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* Connecting multiple TB3 eGPUs via USB4 hub?
@ 2026-05-24 14:56 Dag B
  2026-06-08 15:26 ` Connecting multiple TB3 eGPUs via USB4 hub?' Bjorn Helgaas
  0 siblings, 1 reply; 6+ messages in thread
From: Dag B @ 2026-05-24 14:56 UTC (permalink / raw)
  To: linux-pci

I am attempting to connect two TB3 enclosures to the same USB4 port via 
a USB4 hub.

I cannot figure out of this is in violation of the TB3, TB4 or USB4 spec.

.... or, in case it is not:

Can this work with current USB4/Thunderbolt drivers in Linux? (I am not 
worried about bandwidth limitations.)


This appears to be too niche to find answers anywhere else. I would be 
very grateful for any clarifying answer here, really.


Hardware

- Framework 13 mb with 12th gen Alder Lake (Intel Corporation Alder 
Lake-P Thunderbolt 4 NHI)  (4 USB4 ports)

- Sonnettech Echo 5 hub (Intel Corporation Thunderbolt 4 Bridge [Goshen 
Ridge 2020] )

- Razer Core X (Intel Corporation JHL6340 Thunderbolt 3 Bridge (C step) 
[Alpine Ridge 2C 2016])

- GPUs are Nvidia RTX 3090. They expose two PCIe devices, the GPU and an 
audio device.


Using kernel 7.0.10 with gentoo patches.


Been playing *a lot* with various permutations of pci-related kernel 
options. Current options:

pci=realloc=on,hpmmiosize=256M,hpiosize=2M,hpmemsize=1G,hpbussize=0x33,pcie_scan_all,big_root_window 


pcie_port_pm=off

pcie_aspm.policy=performance

thunderbolt.clx=0



Booting with 2 eGPUS directly connected to separate USB4 ports.  (pcie 
messages only):

[    0.000000] Command line: root=/dev/nvme0n1p2 
pci=realloc=on,hpmmiosize=256M,hpiosize=2M,hpmemsize=1G,hpbussize=0x33,pcie_scan_all,big_root_window 
pcie_port_pm=off pcie_aspm.policy=performance thunderbolt.clx=0
[    0.082296] Kernel command line: 
pci=realloc=on,hpmmiosize=256M,hpiosize=2M,hpmemsize=1G,hpbussize=0x33,pcie_scan_all,big_root_window 
\
[    0.082297] Kernel command line: pcie_port_pm=off 
pcie_aspm.policy=performance \
[    0.864174] pcieport 0000:00:06.0: PME: Signaling with IRQ 122
[    0.864343] pcieport 0000:00:07.0: PME: Signaling with IRQ 123
[    0.864358] pcieport 0000:00:07.0: pciehp: Slot #3 AttnBtn- PwrCtrl- 
MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- 
LLActRep+
[    0.864661] pcieport 0000:00:07.1: PME: Signaling with IRQ 124
[    0.864677] pcieport 0000:00:07.1: pciehp: Slot #4 AttnBtn- PwrCtrl- 
MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- 
LLActRep+
[    0.864900] pcieport 0000:00:07.2: PME: Signaling with IRQ 125
[    0.864914] pcieport 0000:00:07.2: pciehp: Slot #5 AttnBtn- PwrCtrl- 
MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- 
LLActRep+
[    0.865139] pcieport 0000:00:07.3: PME: Signaling with IRQ 126
[    0.865153] pcieport 0000:00:07.3: pciehp: Slot #6 AttnBtn- PwrCtrl- 
MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- 
LLActRep+
[    0.865376] pcieport 0000:00:1d.0: PME: Signaling with IRQ 127
[    5.127515] pcieport 0000:00:07.3: pciehp: Slot(6): Card present
[    5.134225] pcieport 0000:00:07.0: pciehp: Slot(3): Card present
[    5.263158] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.263178] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
failed to assign
[    5.263197] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.263215] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
failed to assign
[    5.270527] pcieport 0000:00:07.3: PCI bridge to [bus 7d-a5]
[    5.270529] pcieport 0000:00:07.3:   bridge window [mem 
0x52000000-0x5e1fffff]
[    5.270531] pcieport 0000:00:07.3:   bridge window [mem 
0x6060000000-0x607bffffff 64bit pref]
[    5.270537] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.270537] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
failed to assign
[    5.270538] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.270539] pcieport 0000:00:07.3: bridge window [io  size 0x200000]: 
failed to assign
[    5.270577] pcieport 0000:00:07.3: PCI bridge to [bus 7d-a5]
[    5.270579] pcieport 0000:00:07.3:   bridge window [mem 
0x52000000-0x5e1fffff]
[    5.270581] pcieport 0000:00:07.3:   bridge window [mem 
0x6060000000-0x607bffffff 64bit pref]
[    5.270703] pcieport 0000:7d:00.0: enabling device (0000 -> 0002)
[    5.287127] pcieport 0000:7e:01.0: enabling device (0000 -> 0002)
[    5.325065] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.325560] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
failed to assign
[    5.326061] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.326560] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
failed to assign
[    5.340678] pcieport 0000:00:07.0: PCI bridge to [bus 02-2a]
[    5.340680] pcieport 0000:00:07.0:   bridge window [mem 
0x7c000000-0x881fffff]
[    5.340682] pcieport 0000:00:07.0:   bridge window [mem 
0x6000000000-0x601bffffff 64bit pref]
[    5.340688] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.340689] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
failed to assign
[    5.340690] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
can't assign; no space
[    5.340690] pcieport 0000:00:07.0: bridge window [io  size 0x200000]: 
failed to assign
[    5.340741] pcieport 0000:00:07.0: PCI bridge to [bus 02-2a]
[    5.340744] pcieport 0000:00:07.0:   bridge window [mem 
0x7c000000-0x881fffff]
[    5.340745] pcieport 0000:00:07.0:   bridge window [mem 
0x6000000000-0x601bffffff 64bit pref]
[    5.340866] pcieport 0000:02:00.0: enabling device (0000 -> 0002)
[    5.355410] pcieport 0000:03:01.0: enabling device (0000 -> 0002)


Then, connecting the hub with two additional eGPUs to a third USB4 port 
(all messages):

[  596.449718] thunderbolt 0-3: new device found, vendor=0x8 device=0x5f
[  596.449771] thunderbolt 0-3: Sonnet Technologies, Inc. Echo 5 
Thunderbolt 4 Hub
[  596.710380] thunderbolt 0-0:3.1: new retimer found, vendor=0x8087 
device=0x15ee
[  596.962295] usb 3-3: new high-speed USB device number 4 using xhci_hcd
[  597.156102] usb 3-3: New USB device found, idVendor=1d5c, 
idProduct=5801, bcdDevice= 1.01
[  597.156118] usb 3-3: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[  597.156130] usb 3-3: Product: USB2.0 Hub
[  597.156138] usb 3-3: Manufacturer: Fresco Logic, Inc.
[  597.157120] hub 3-3:1.0: USB hub found
[  597.157152] hub 3-3:1.0: 6 ports detected
[  597.458933] usb 2-2: new SuperSpeed Plus Gen 2x1 USB device number 4 
using xhci_hcd
[  597.472670] usb 2-2: New USB device found, idVendor=8087, 
idProduct=0b40, bcdDevice=12.34
[  597.472687] usb 2-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[  597.472700] usb 2-2: Product: USB3.0 Hub
[  597.472711] usb 2-2: Manufacturer: Intel Corporation.
[  597.473459] hub 2-2:1.0: USB hub found
[  597.473587] hub 2-2:1.0: 4 ports detected
[  597.559335] thunderbolt 0-303: new device found, vendor=0x127 device=0x1
[  597.559350] thunderbolt 0-303: Razer Core X
[  597.702310] usb 3-3.5: new full-speed USB device number 5 using xhci_hcd
[  597.801389] usb 3-3.5: New USB device found, idVendor=2a8c, 
idProduct=205f, bcdDevice=17.46
[  597.801406] usb 3-3.5: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[  597.801418] usb 3-3.5: Product: Echo 5 Thunderbolt 4 Hub
[  597.801428] usb 3-3.5: Manufacturer: Sonnet Technologies,Inc.
[  597.801438] usb 3-3.5: SerialNumber: 11AD1D0A510D2E0D381E0B00
[  597.885632] usb 3-3.6: new high-speed USB device number 6 using xhci_hcd
[  597.983768] usb 3-3.6: New USB device found, idVendor=1d5c, 
idProduct=5530, bcdDevice= 1.01
[  597.983785] usb 3-3.6: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[  597.983798] usb 3-3.6: Product: Frescologic VENDOR HID
[  597.983807] usb 3-3.6: Manufacturer: Frescologic
[  597.985769] hid-generic 0003:1D5C:5530.0002: hidraw1: USB HID v1.01 
Device [Frescologic Frescologic VENDOR HID] on usb-0000:00:14.0-3.6/input0
[  598.294042] thunderbolt 0-503: new device found, vendor=0x127 device=0x1
[  598.294057] thunderbolt 0-503: Razer Core X
[  598.619985] pcieport 0000:00:07.1: pciehp: Slot(4): Card present
[  598.619999] pcieport 0000:00:07.1: pciehp: Slot(4): Link Up
[  598.745860] pci 0000:2b:00.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Upstream Port
[  598.745987] pci 0000:2b:00.0: PCI bridge to [bus 00]
[  598.746028] pci 0000:2b:00.0:   bridge window [io 0x0000-0x0fff]
[  598.746061] pci 0000:2b:00.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.746113] pci 0000:2b:00.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.746173] pci 0000:2b:00.0: enabling Extended Tags
[  598.746450] pci 0000:2b:00.0: supports D1 D2
[  598.746471] pci 0000:2b:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.747002] pci 0000:2b:00.0: Adding to iommu group 22
[  598.755705] pci 0000:2b:00.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.755945] pci 0000:2c:00.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.756014] pci 0000:2c:00.0: PCI bridge to [bus 00]
[  598.756039] pci 0000:2c:00.0:   bridge window [io 0x0000-0x0fff]
[  598.756059] pci 0000:2c:00.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.756094] pci 0000:2c:00.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.756136] pci 0000:2c:00.0: enabling Extended Tags
[  598.756346] pci 0000:2c:00.0: supports D1 D2
[  598.756359] pci 0000:2c:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.756675] pci 0000:2c:00.0: Adding to iommu group 23
[  598.756854] pci 0000:2c:01.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.756925] pci 0000:2c:01.0: PCI bridge to [bus 00]
[  598.756950] pci 0000:2c:01.0:   bridge window [io 0x0000-0x0fff]
[  598.756970] pci 0000:2c:01.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.757863] pci 0000:2c:01.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.758743] pci 0000:2c:01.0: enabling Extended Tags
[  598.759822] pci 0000:2c:01.0: supports D1 D2
[  598.760599] pci 0000:2c:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.761582] pci 0000:2c:01.0: Adding to iommu group 24
[  598.762477] pci 0000:2c:02.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.763270] pci 0000:2c:02.0: PCI bridge to [bus 00]
[  598.764010] pci 0000:2c:02.0:   bridge window [io 0x0000-0x0fff]
[  598.764697] pci 0000:2c:02.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.765266] pci 0000:2c:02.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.765832] pci 0000:2c:02.0: enabling Extended Tags
[  598.766513] pci 0000:2c:02.0: supports D1 D2
[  598.767016] pci 0000:2c:02.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.767686] pci 0000:2c:02.0: Adding to iommu group 25
[  598.768272] pci 0000:2c:03.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.768804] pci 0000:2c:03.0: PCI bridge to [bus 00]
[  598.769323] pci 0000:2c:03.0:   bridge window [io 0x0000-0x0fff]
[  598.769815] pci 0000:2c:03.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.770317] pci 0000:2c:03.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.770816] pci 0000:2c:03.0: enabling Extended Tags
[  598.771451] pci 0000:2c:03.0: supports D1 D2
[  598.771929] pci 0000:2c:03.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.772596] pci 0000:2c:03.0: Adding to iommu group 26
[  598.773173] pci 0000:2c:04.0: [8086:0b26] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.773694] pci 0000:2c:04.0: PCI bridge to [bus 00]
[  598.774196] pci 0000:2c:04.0:   bridge window [io 0x0000-0x0fff]
[  598.774683] pci 0000:2c:04.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.775179] pci 0000:2c:04.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.775687] pci 0000:2c:04.0: enabling Extended Tags
[  598.776319] pci 0000:2c:04.0: supports D1 D2
[  598.776794] pci 0000:2c:04.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.777437] pci 0000:2c:04.0: Adding to iommu group 27
[  598.777985] pci 0000:2b:00.0: PCI bridge to [bus 2c-53]
[  598.778481] pci 0000:2c:00.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.778983] pci 0000:2c:01.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.779463] pci 0000:2c:02.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.779939] pci 0000:2c:03.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.780408] pci 0000:2c:04.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.780987] pci 0000:2c:00.0: PCI bridge to [bus 2d-53]
[  598.781458] pci_bus 0000:2d: busn_res: [bus 2d-53] end is updated to 2d
[  598.782096] pci 0000:2e:00.0: [8086:15da] type 01 class 0x060400 PCIe 
Switch Upstream Port
[  598.782628] pci 0000:2e:00.0: PCI bridge to [bus 00]
[  598.783089] pci 0000:2e:00.0:   bridge window [io 0x0000-0x0fff]
[  598.783548] pci 0000:2e:00.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.784020] pci 0000:2e:00.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.784493] pci 0000:2e:00.0: enabling Extended Tags
[  598.785172] pci 0000:2e:00.0: supports D1 D2
[  598.785624] pci 0000:2e:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.786319] pci 0000:2e:00.0: Adding to iommu group 28
[  598.792407] pci 0000:2c:01.0: PCI bridge to [bus 2e-53]
[  598.792880] pci 0000:2e:00.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.793579] pci 0000:2f:01.0: [8086:15da] type 01 class 0x060400 PCIe 
Switch Downstream Port
[  598.794094] pci 0000:2f:01.0: PCI bridge to [bus 00]
[  598.794559] pci 0000:2f:01.0:   bridge window [io 0x0000-0x0fff]
[  598.795014] pci 0000:2f:01.0:   bridge window [mem 
0x00000000-0x000fffff]
[  598.795485] pci 0000:2f:01.0:   bridge window [mem 
0x00000000-0x000fffff 64bit pref]
[  598.795981] pci 0000:2f:01.0: enabling Extended Tags
[  598.796665] pci 0000:2f:01.0: supports D1 D2
[  598.797111] pci 0000:2f:01.0: PME# supported from D0 D1 D2 D3hot D3cold
[  598.797785] pci 0000:2f:01.0: Adding to iommu group 29
[  598.798344] pci 0000:2e:00.0: PCI bridge to [bus 2f-53]
[  598.798826] pci 0000:2f:01.0: bridge configuration invalid ([bus 
00-00]), reconfiguring
[  598.799576] pci 0000:30:00.0: [10de:2204] type 00 class 0x030000 PCIe 
Legacy Endpoint
[  598.800146] pci 0000:30:00.0: BAR 0 [mem 0x00000000-0x00ffffff]
[  598.800598] pci 0000:30:00.0: BAR 1 [mem 0x00000000-0x0fffffff 64bit 
pref]
[  598.801062] pci 0000:30:00.0: BAR 3 [mem 0x00000000-0x01ffffff 64bit 
pref]
[  598.801512] pci 0000:30:00.0: BAR 5 [io  0x0000-0x007f]
[  598.801961] pci 0000:30:00.0: ROM [mem 0x00000000-0x0007ffff pref]
[  598.802697] pci 0000:30:00.0: PME# supported from D0 D3hot
[  598.803421] pci 0000:30:00.0: 8.000 Gb/s available PCIe bandwidth, 
limited by 2.5 GT/s PCIe x4 link at 0000:00:07.1 (capable of 252.048 
Gb/s with 16.0 GT/s PCIe x16 link)
[  598.804053] pci 0000:30:00.0: Adding to iommu group 29
[  598.804517] pci 0000:30:00.0: vgaarb: bridge control possible
[  598.804969] pci 0000:30:00.0: vgaarb: VGA device added: 
decodes=io+mem,owns=none,locks=none
[  598.805427] i915 0000:00:02.0: vgaarb: VGA decodes changed: 
olddecodes=none,decodes=none:owns=io+mem
[  598.806033] pci 0000:30:00.1: [10de:1aef] type 00 class 0x040300 PCIe 
Endpoint
[  598.806622] pci 0000:30:00.1: BAR 0 [mem 0x00000000-0x00003fff]
[  598.807434] pci 0000:30:00.1: Adding to iommu group 29
[  598.808118] pci 0000:2f:01.0: PCI bridge to [bus 30-53]
[  598.808614] pci_bus 0000:30: busn_res: [bus 30-53] end is updated to 30
[  598.809107] pci_bus 0000:2f: busn_res: [bus 2f-53] end is updated to 30
[  598.809575] pci_bus 0000:2e: busn_res: [bus 2e-53] end is updated to 53
[  598.810077] pci_bus 0000:54: busn_res: [bus 54-7c] end is updated to 7c
[  598.810714] pci_bus 0000:7d: busn_res: [bus 7d-a5] end is updated to a5
[  598.811226] pci_bus 0000:a6: busn_res: [bus a6] end is updated to a6
[  598.811682] pci_bus 0000:2c: busn_res: [bus 2c-53] end can not be 
updated to a6
[  598.812141] pci 0000:2c:00.0: disabling bridge window [mem 
0x00000000-0x000fffff 64bit pref] to [bus 2d] (unused)
[  598.812621] pci 0000:2c:00.0: disabling bridge window [mem 
0x00000000-0x000fffff] to [bus 2d] (unused)
[  598.813082] pci 0000:2c:01.0: bridge window [io  0x1000-0x1fff] to 
[bus 2e-53] add_size 1ff000
[  598.813544] pci 0000:2c:01.0: bridge window [mem 
0x10000000-0x21ffffff 64bit pref] to [bus 2e-53] add_size 2e000000 
add_align 10000000
[  598.814007] pci 0000:2c:01.0: bridge window [mem 
0x01000000-0x020fffff] to [bus 2e-53] add_size 3ef00000 add_align 1000000
[  598.814474] pci 0000:2b:00.0: bridge window [io  0x1000-0x2fff] to 
[bus 2c-53] add_size 1ff000
[  598.814942] pci 0000:2b:00.0: bridge window [mem 
0x10000000-0x21ffffff 64bit pref] to [bus 2c-53] add_size 2e000000 
add_align 10000000
[  598.815414] pci 0000:2b:00.0: bridge window [mem 
0x01000000-0x020fffff] to [bus 2c-53] add_size 3ef00000 add_align 1000000
[  598.815908] pcieport 0000:00:07.1: bridge window [io  size 0x200000] 
to [bus 2b-53] add_size 1ff000
[  598.816393] pcieport 0000:00:07.1: bridge window [io  size 0x3ff000]: 
can't assign; no space
[  598.816870] pcieport 0000:00:07.1: bridge window [io  size 0x3ff000]: 
failed to assign
[  598.817346] pcieport 0000:00:07.1: bridge window [io  size 0x200000]: 
can't assign; no space
[  598.817828] pcieport 0000:00:07.1: bridge window [io  size 0x200000]: 
failed to assign
[  598.818304] pci 0000:2b:00.0: bridge window [mem size 0x40000000 
64bit pref]: can't assign; no space
[  598.818785] pci 0000:2b:00.0: bridge window [mem size 0x40000000 
64bit pref]: failed to assign
[  598.819281] pci 0000:2b:00.0: bridge window [mem 
0x6e000000-0x7a0fffff]: assigned
[  598.819765] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
can't assign; no space
[  598.820250] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
failed to assign
[  598.820740] pci 0000:2b:00.0: bridge window [mem 
0x6e000000-0x7a0fffff]: releasing
[  598.821235] pci 0000:2b:00.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: assigned
[  598.821727] pci 0000:2b:00.0: bridge window [mem 
0x6e000000-0x7a0fffff]: assigned
[  598.822227] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
can't assign; no space
[  598.822722] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
failed to assign
[  598.823206] pci 0000:2b:00.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: failed to expand by 0x2e000000
[  598.823697] pci 0000:2b:00.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: failed to add optional 2e000000
[  598.824186] pci 0000:2c:01.0: bridge window [mem size 0x40000000 
64bit pref]: can't assign; no space
[  598.824679] pci 0000:2c:01.0: bridge window [mem size 0x40000000 
64bit pref]: failed to assign
[  598.825173] pci 0000:2c:01.0: bridge window [mem 
0x6e000000-0x720fffff]: assigned
[  598.825677] pci 0000:2c:00.0: bridge window [io  size 0x1000]: can't 
assign; no space
[  598.826173] pci 0000:2c:00.0: bridge window [io  size 0x1000]: failed 
to assign
[  598.826666] pci 0000:2c:01.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.827161] pci 0000:2c:01.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.827652] pci 0000:2c:01.0: bridge window [mem 
0x6e000000-0x720fffff]: releasing
[  598.828140] pci 0000:2c:01.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: assigned
[  598.828630] pci 0000:2c:01.0: bridge window [mem 
0x6e000000-0x720fffff]: assigned
[  598.829132] pci 0000:2c:00.0: bridge window [io  size 0x1000]: can't 
assign; no space
[  598.829623] pci 0000:2c:00.0: bridge window [io  size 0x1000]: failed 
to assign
[  598.830116] pci 0000:2c:01.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.830606] pci 0000:2c:01.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.831099] pci 0000:2c:01.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: failed to expand by 0x2e000000
[  598.831588] pci 0000:2c:01.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: failed to add optional 2e000000
[  598.832080] pci 0000:2c:00.0: PCI bridge to [bus 2d]
[  598.832605] pci 0000:2e:00.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: assigned
[  598.833106] pci 0000:2e:00.0: bridge window [mem 
0x6e000000-0x720fffff]: assigned
[  598.833599] pci 0000:2e:00.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.834091] pci 0000:2e:00.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.834590] pci 0000:2e:00.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.835088] pci 0000:2e:00.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.835592] pci 0000:2f:01.0: bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]: assigned
[  598.836098] pci 0000:2f:01.0: bridge window [mem 
0x6e000000-0x720fffff]: assigned
[  598.836600] pci 0000:2f:01.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.837097] pci 0000:2f:01.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.837585] pci 0000:2f:01.0: bridge window [io  size 0xab000]: can't 
assign; no space
[  598.838073] pci 0000:2f:01.0: bridge window [io  size 0xab000]: 
failed to assign
[  598.838559] pci 0000:30:00.0: BAR 1 [mem 0x6020000000-0x602fffffff 
64bit pref]: assigned
[  598.839079] pci 0000:30:00.0: BAR 3 [mem 0x6030000000-0x6031ffffff 
64bit pref]: assigned
[  598.839581] pci 0000:30:00.0: BAR 0 [mem 0x6e000000-0x6effffff]: 
assigned
[  598.840063] pci 0000:30:00.0: ROM [mem 0x6f000000-0x6f07ffff pref]: 
assigned
[  598.840538] pci 0000:30:00.1: BAR 0 [mem 0x6f080000-0x6f083fff]: 
assigned
[  598.841020] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: can't assign; 
no space
[  598.841496] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: failed to assign
[  598.841974] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: can't assign; 
no space
[  598.842463] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: failed to assign
[  598.842941] pci 0000:2f:01.0: PCI bridge to [bus 30]
[  598.843429] pci 0000:2f:01.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.843918] pci 0000:2f:01.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.844415] pci 0000:2e:00.0: PCI bridge to [bus 2f-30]
[  598.844901] pci 0000:2e:00.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.845388] pci 0000:2e:00.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.845890] pci 0000:2c:01.0: PCI bridge to [bus 2e-53]
[  598.846369] pci 0000:2c:01.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.846845] pci 0000:2c:01.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.847319] pci 0000:2b:00.0: PCI bridge to [bus 2c-53]
[  598.847789] pci 0000:2b:00.0:   bridge window [mem 
0x6e000000-0x7a0fffff]
[  598.848255] pci 0000:2b:00.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.848720] pcieport 0000:00:07.1: PCI bridge to [bus 2b-53]
[  598.849198] pcieport 0000:00:07.1:   bridge window [mem 
0x6e000000-0x7a1fffff]
[  598.849667] pcieport 0000:00:07.1:   bridge window [mem 
0x6020000000-0x603bffffff 64bit pref]
[  598.850136] PCI: No. 2 try to assign unassigned res
[  598.850602] pci 0000:2c:00.0: disabling bridge window [mem 
0x00000000-0x000fffff 64bit pref disabled] to [bus 2d] (unused)
[  598.851083] pci 0000:2c:00.0: disabling bridge window [mem 
0x00000000-0x000fffff disabled] to [bus 2d] (unused)
[  598.851556] pci 0000:2c:01.0: bridge window [io  size 0xab000] to 
[bus 2e-53] add_size 155000
[  598.852035] pci 0000:2b:00.0: bridge window [io  size 0x200000] to 
[bus 2c-53] add_size 155000
[  598.852530] pcieport 0000:00:07.1: bridge window [io  size 0x200000] 
to [bus 2b-53] add_size 155000
[  598.853014] pcieport 0000:00:07.1: bridge window [io  size 0x355000]: 
can't assign; no space
[  598.853493] pcieport 0000:00:07.1: bridge window [io  size 0x355000]: 
failed to assign
[  598.853971] pcieport 0000:00:07.1: bridge window [io  size 0x200000]: 
can't assign; no space
[  598.854448] pcieport 0000:00:07.1: bridge window [io  size 0x200000]: 
failed to assign
[  598.854921] pci 0000:2b:00.0: bridge window [io  size 0x355000]: 
can't assign; no space
[  598.855401] pci 0000:2b:00.0: bridge window [io  size 0x355000]: 
failed to assign
[  598.855896] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
can't assign; no space
[  598.856376] pci 0000:2b:00.0: bridge window [io  size 0x200000]: 
failed to assign
[  598.856847] pci 0000:2c:00.0: bridge window [io  size 0x1000]: can't 
assign; no space
[  598.857319] pci 0000:2c:00.0: bridge window [io  size 0x1000]: failed 
to assign
[  598.857788] pci 0000:2c:01.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.858255] pci 0000:2c:01.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.858722] pci 0000:2c:00.0: bridge window [io  size 0x1000]: can't 
assign; no space
[  598.859209] pci 0000:2c:00.0: bridge window [io  size 0x1000]: failed 
to assign
[  598.859677] pci 0000:2c:01.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.860143] pci 0000:2c:01.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.860609] pci 0000:2c:00.0: PCI bridge to [bus 2d]
[  598.861088] pci 0000:2e:00.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.861556] pci 0000:2e:00.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.862018] pci 0000:2e:00.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.862501] pci 0000:2e:00.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.862970] pci 0000:2f:01.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.863429] pci 0000:2f:01.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.863891] pci 0000:2f:01.0: bridge window [io  size 0x11c000]: 
can't assign; no space
[  598.864349] pci 0000:2f:01.0: bridge window [io  size 0x11c000]: 
failed to assign
[  598.864802] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: can't assign; 
no space
[  598.865254] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: failed to assign
[  598.865715] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: can't assign; 
no space
[  598.866163] pci 0000:30:00.0: BAR 5 [io  size 0x0080]: failed to assign
[  598.866615] pci 0000:2f:01.0: PCI bridge to [bus 30]
[  598.867073] pci 0000:2f:01.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.867528] pci 0000:2f:01.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.867992] pci 0000:2e:00.0: PCI bridge to [bus 2f-30]
[  598.868448] pci 0000:2e:00.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.868907] pci 0000:2e:00.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.869374] pci 0000:2c:01.0: PCI bridge to [bus 2e-53]
[  598.869833] pci 0000:2c:01.0:   bridge window [mem 
0x6e000000-0x720fffff]
[  598.870286] pci 0000:2c:01.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.870749] pci 0000:2b:00.0: PCI bridge to [bus 2c-53]
[  598.871209] pci 0000:2b:00.0:   bridge window [mem 
0x6e000000-0x7a0fffff]
[  598.871670] pci 0000:2b:00.0:   bridge window [mem 
0x6020000000-0x6031ffffff 64bit pref]
[  598.872132] pcieport 0000:00:07.1: PCI bridge to [bus 2b-53]
[  598.872613] pcieport 0000:00:07.1:   bridge window [mem 
0x6e000000-0x7a1fffff]
[  598.873080] pcieport 0000:00:07.1:   bridge window [mem 
0x6020000000-0x603bffffff 64bit pref]
[  598.873649] pcieport 0000:2b:00.0: enabling device (0000 -> 0002)
[  598.874666] pcieport 0000:2c:01.0: enabling device (0000 -> 0002)
[  598.875244] pcieport 0000:2c:01.0: pciehp: Slot #1 AttnBtn- PwrCtrl- 
MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- 
LLActRep+
[  598.876454] pcieport 0000:2c:02.0: pciehp: Hotplug bridge without 
secondary bus, ignoring
[  598.877284] pcieport 0000:2c:03.0: pciehp: Hotplug bridge without 
secondary bus, ignoring
[  598.878335] pcieport 0000:2e:00.0: enabling device (0000 -> 0002)
[  598.879210] pcieport 0000:2f:01.0: enabling device (0000 -> 0002)
[  598.880224] nvidia 0000:30:00.0: enabling device (0000 -> 0002)
[  598.880833] nvidia 0000:30:00.0: vgaarb: VGA decodes changed: 
olddecodes=io+mem,decodes=none:owns=none
[  599.171370] [drm] [nvidia-drm] [GPU ID 0x00003000] Loading driver
[  599.172273] [drm] Initialized nvidia-drm 0.0.0 for 0000:30:00.0 on 
minor 3
[  599.172936] pci 0000:30:00.1: extending delay after power-on from 
D3hot to 20 msec
[  599.173650] pci 0000:30:00.1: D0 power state depends on 0000:30:00.0
[  683.104898] Loading firmware: nvidia/595.71.05/gsp_ga10x.bin
[  683.634039] Loading firmware: nvidia/595.71.05/gsp_ga10x.bin
[  684.043158] Loading firmware: nvidia/595.71.05/gsp_ga10x.bin

So, only one of the two hub-connected eGPUs are recognized.


pciehp: Hotplug bridge without secondary bus, ignoring <-  This sounds 
less promising.


lspci (after connecting hub):

00:00.0 Host bridge: Intel Corporation 12th Gen Core Processor Host 
Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-P GT2 
[Iris Xe Graphics] (rev 0c)
00:04.0 Signal processing controller: Intel Corporation Alder Lake 
Innovation Platform Framework Processor Participant (rev 02)
00:06.0 PCI bridge: Intel Corporation 12th Gen Core Processor PCI 
Express x4 Controller #0 (rev 02)
00:07.0 PCI bridge: Intel Corporation Alder Lake-P Thunderbolt 4 PCI 
Express Root Port #0 (rev 02)
00:07.1 PCI bridge: Intel Corporation Alder Lake-P Thunderbolt 4 PCI 
Express Root Port #1 (rev 02)
00:07.2 PCI bridge: Intel Corporation Alder Lake-P Thunderbolt 4 PCI 
Express Root Port #2 (rev 02)
00:07.3 PCI bridge: Intel Corporation Alder Lake-P Thunderbolt 4 PCI 
Express Root Port #3 (rev 02)
00:08.0 System peripheral: Intel Corporation 12th Gen Core Processor 
Gaussian & Neural Accelerator (rev 02)
00:0a.0 Signal processing controller: Intel Corporation Platform 
Monitoring Technology (rev 01)
00:0d.0 USB controller: Intel Corporation Alder Lake-P Thunderbolt 4 USB 
Controller (rev 02)
00:0d.2 USB controller: Intel Corporation Alder Lake-P Thunderbolt 4 NHI 
#0 (rev 02)
00:0d.3 USB controller: Intel Corporation Alder Lake-P Thunderbolt 4 NHI 
#1 (rev 02)
00:14.0 USB controller: Intel Corporation Alder Lake PCH USB 3.2 xHCI 
Host Controller (rev 01)
00:14.2 RAM memory: Intel Corporation Alder Lake PCH Shared SRAM (rev 01)
00:15.0 Serial bus controller: Intel Corporation Alder Lake PCH Serial 
IO I2C Controller #0 (rev 01)
00:15.1 Serial bus controller: Intel Corporation Alder Lake PCH Serial 
IO I2C Controller #1 (rev 01)
00:15.3 Serial bus controller: Intel Corporation Alder Lake PCH Serial 
IO I2C Controller #3 (rev 01)
00:16.0 Communication controller: Intel Corporation Alder Lake PCH HECI 
Controller (rev 01)
00:16.3 Serial controller: Intel Corporation Alder Lake AMT SOL 
Redirection (rev 01)
00:1d.0 PCI bridge: Intel Corporation Alder Lake PCI Express Root Port 
#9 (rev 01)
00:1f.0 ISA bridge: Intel Corporation Alder Lake PCH eSPI Controller 
(rev 01)
00:1f.3 Audio device: Intel Corporation Alder Lake PCH-P High Definition 
Audio Controller (rev 01)
00:1f.4 SMBus: Intel Corporation Alder Lake PCH-P SMBus Host Controller 
(rev 01)
00:1f.5 Serial bus controller: Intel Corporation Alder Lake-P PCH SPI 
Controller (rev 01)
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe 
SSD Controller PM9C1a (DRAM-less)
02:00.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
03:01.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
04:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 
3090] (rev a1)
04:00.1 Audio device: NVIDIA Corporation GA102 High Definition Audio 
Controller (rev a1)
2b:00.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2c:00.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2c:01.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2c:02.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2c:03.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2c:04.0 PCI bridge: Intel Corporation Thunderbolt 4 Bridge [Goshen Ridge 
2020] (rev 03)
2e:00.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
2f:01.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
30:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 
3090] (rev a1)
30:00.1 Audio device: NVIDIA Corporation GA102 High Definition Audio 
Controller (rev a1)
7d:00.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
7e:01.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C 
step) [Alpine Ridge 2C 2016] (rev 02)
7f:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 
3090 Ti] (rev a1)
7f:00.1 Audio device: NVIDIA Corporation GA102 High Definition Audio 
Controller (rev a1)
a6:00.0 Ethernet controller: Intel Corporation Ethernet Controller 
I226-V (rev 04)


/proc/iomem after connecting hub

00000000-00000fff : Reserved
00001000-0009efff : System RAM
0009f000-000fffff : Reserved
   000a0000-000bffff : PCI Bus 0000:00
   000f0000-000fffff : System ROM
00100000-3727bfff : System RAM
3727c000-372cafff : Reserved
372cb000-388b2fff : System RAM
388b3000-388b3fff : Reserved
388b4000-3b138fff : System RAM
3b139000-3ba38fff : Reserved
3ba39000-3d84efff : System RAM
3d84f000-40a7efff : Reserved
40a7f000-43a2efff : ACPI Non-volatile Storage
   43945000-43945fff : USBC000:00
43a2f000-43afefff : ACPI Tables
43aff000-43afffff : System RAM
43b00000-47ffffff : Reserved
49200000-493fffff : Reserved
4a000000-503fffff : Reserved
   4c800000-503fffff : Graphics Stolen Memory
50400000-bfffffff : PCI Bus 0000:00
   50400000-50400fff : 0000:00:1f.5
   50500000-507fffff : PCI Bus 0000:a6
     50500000-505fffff : 0000:a6:00.0
       50500000-505fffff : igc
     50600000-506fffff : 0000:a6:00.0
     50700000-50703fff : 0000:a6:00.0
       50700000-50703fff : igc
   52000000-5e1fffff : PCI Bus 0000:7d
     52000000-5e0fffff : PCI Bus 0000:7e
       52000000-5e0fffff : PCI Bus 0000:7f
         52000000-52ffffff : 0000:7f:00.0
           52000000-52ffffff : nvidia
         53000000-5307ffff : 0000:7f:00.0
         53080000-53083fff : 0000:7f:00.1
   60000000-6c1fffff : PCI Bus 0000:54
   6e000000-7a1fffff : PCI Bus 0000:2b
     6e000000-7a0fffff : PCI Bus 0000:2c
       6e000000-720fffff : PCI Bus 0000:2e
         6e000000-720fffff : PCI Bus 0000:2f
           6e000000-720fffff : PCI Bus 0000:30
             6e000000-6effffff : 0000:30:00.0
               6e000000-6effffff : nvidia
             6f000000-6f07ffff : 0000:30:00.0
             6f080000-6f083fff : 0000:30:00.1
   7a400000-7a4fffff : PCI Bus 0000:01
     7a400000-7a403fff : 0000:01:00.0
       7a400000-7a403fff : nvme
   7a600000-7a60ffff : 0000:00:14.0
     7a600000-7a60ffff : xhci-hcd
   7a611000-7a611fff : 0000:00:16.3
   7c000000-881fffff : PCI Bus 0000:02
     7c000000-880fffff : PCI Bus 0000:03
       7c000000-880fffff : PCI Bus 0000:04
         7c000000-7cffffff : 0000:04:00.0
           7c000000-7cffffff : nvidia
         7d000000-7d07ffff : 0000:04:00.0
         7d080000-7d083fff : 0000:04:00.1
c0000000-cfffffff : PCI ECAM 0000 [bus 00-ff]
   c0000000-cfffffff : PNP0C02:01
fd000000-fd68ffff : PNP0C02:02
fd690000-fd69ffff : INTC1055:00
fd6a0000-fd6affff : INTC1055:00
fd6b0000-fd6cffff : PNP0C02:02
fd6d0000-fd6dffff : INTC1055:00
fd6e0000-fd6effff : INTC1055:00
fd6f0000-fdffffff : PNP0C02:02
fe000000-fe01ffff : PNP0C02:02
fe04c000-fe04ffff : PNP0C02:02
fe050000-fe0affff : PNP0C02:02
fe0d0000-fe0fffff : PNP0C02:02
fe200000-fe7fffff : PNP0C02:02
fec00000-fec003ff : IOAPIC 0
fed00000-fed003ff : HPET 0
   fed00000-fed003ff : PNP0103:00
fed20000-fed7ffff : Reserved
   fed40000-fed44fff : NTC0702:00
fed90000-fed90fff : dmar0
fed91000-fed91fff : dmar1
feda0000-feda0fff : PNP0C02:01
feda1000-feda1fff : PNP0C02:01
fedc0000-fedc7fff : PNP0C02:01
fee00000-feefffff : PNP0C02:01
ff000000-ffffffff : PNP0C02:02
100000000-10afbfffff : System RAM
   d6a000000-d6b1e52f7 : Kernel code
   d6b200000-d6b7a0fff : Kernel rodata
   d6b800000-d6bac0cff : Kernel data
   d6c247000-d6c30ffff : Kernel bss
10afc00000-10afffffff : RAM buffer
4000000000-7fffffffff : PCI Bus 0000:00
   4000000000-400fffffff : 0000:00:02.0
   4010000000-4016ffffff : 0000:00:02.0
   4017000000-4017000fff : 0000:00:15.0
     4017000000-40170001ff : lpss_dev
       4017000000-40170001ff : i2c_designware.0 lpss_dev
     4017000200-40170002ff : lpss_priv
     4017000800-4017000fff : idma64.0
   4017001000-4017001fff : 0000:00:15.1
     4017001000-40170011ff : lpss_dev
       4017001000-40170011ff : i2c_designware.1 lpss_dev
     4017001200-40170012ff : lpss_priv
     4017001800-4017001fff : idma64.1
   4017002000-4017002fff : 0000:00:15.3
     4017002000-40170021ff : lpss_dev
       4017002000-40170021ff : i2c_designware.2 lpss_dev
     4017002200-40170022ff : lpss_priv
     4017002800-4017002fff : idma64.2
   4020000000-40ffffffff : 0000:00:02.0
   6000000000-601bffffff : PCI Bus 0000:02
     6000000000-6011ffffff : PCI Bus 0000:03
       6000000000-6011ffffff : PCI Bus 0000:04
         6000000000-600fffffff : 0000:04:00.0
         6010000000-6011ffffff : 0000:04:00.0
   6020000000-603bffffff : PCI Bus 0000:2b
     6020000000-6031ffffff : PCI Bus 0000:2c
       6020000000-6031ffffff : PCI Bus 0000:2e
         6020000000-6031ffffff : PCI Bus 0000:2f
           6020000000-6031ffffff : PCI Bus 0000:30
             6020000000-602fffffff : 0000:30:00.0
             6030000000-6031ffffff : 0000:30:00.0
   6040000000-605bffffff : PCI Bus 0000:54
   605c000000-605cffffff : 0000:00:02.0
   605d000000-605d0fffff : 0000:00:1f.3
   605d100000-605d13ffff : 0000:00:0d.3
     605d100000-605d13ffff : thunderbolt
   605d140000-605d17ffff : 0000:00:0d.2
     605d140000-605d17ffff : thunderbolt
   605d180000-605d19ffff : 0000:00:04.0
     605d180000-605d19ffff : proc_thermal
   605d1a0000-605d1affff : 0000:00:0d.0
     605d1a0000-605d1affff : xhci-hcd
   605d1b0000-605d1b7fff : 0000:00:0a.0
   605d1b8000-605d1bbfff : 0000:00:1f.3
   605d1bc000-605d1bffff : 0000:00:14.2
   605d1c0000-605d1c00ff : 0000:00:1f.4
     605d1c0000-605d1c00ff : i801_smbus
   605d1c1000-605d1c1fff : 0000:00:16.0
     605d1c1000-605d1c1fff : mei_me
   605d1c5000-605d1c5fff : 0000:00:14.2
   605d1c6000-605d1c6fff : 0000:00:0d.3
   605d1c7000-605d1c7fff : 0000:00:0d.2
   605d1c8000-605d1c8fff : 0000:00:08.0
   6060000000-607bffffff : PCI Bus 0000:7d
     6060000000-6071ffffff : PCI Bus 0000:7e
       6060000000-6071ffffff : PCI Bus 0000:7f
         6060000000-606fffffff : 0000:7f:00.0
         6070000000-6071ffffff : 0000:7f:00.0



^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2026-06-11  5:28 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-24 14:56 Connecting multiple TB3 eGPUs via USB4 hub? Dag B
2026-06-08 15:26 ` Connecting multiple TB3 eGPUs via USB4 hub?' Bjorn Helgaas
2026-06-09 12:08   ` Mika Westerberg
2026-06-10 22:48     ` Dag B
2026-06-11  4:41       ` Mika Westerberg
2026-06-11  5:28         ` Mika Westerberg

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