On Thu Jul 13 2023, Heiner Kallweit wrote:
> On 13.07.2023 09:01, Kurt Kanzenbach wrote:
>> Hello Heiner,
>> 
>> On Mon Jul 10 2023, Heiner Kallweit wrote:
>>> On 05.07.2023 00:25, Tobias Klausmann wrote:
>>>> Hi, top posting as well, as im on vacation, too. The system does not
>>>> allow disabling ASPM, it is a very constrained notebook BIOS, thus
>>>> the suggestion is nit feasible. All in all the sugesstion seems not
>>>> favorable for me, as it is unknown how many systems are broken the
>>>> same way. Having a workaround adviced as default seems oretty wrong
>>>> to me.
>>>>
>>>
>>> To get a better understanding of the affected system:
>>> Could you please provide a full dmesg log and the lspci -vv output?
>> 
>> I'm having the same problem as described by Tobias on a desktop
>> machine. v6.3 works; v6.4 results in transmit queue timeouts
>> occasionally. Reverting 2ab19de62d67 ("r8169: remove ASPM restrictions
>> now that ASPM is disabled during NAPI poll") "solves" the issue.
>> 
>> From dmesg:
>> 
>> |~ % dmesg | grep -i ASPM
>> |[    0.152746] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
>> |[    0.905100] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
>> |[    0.906508] acpi PNP0A08:00: FADT indicates ASPM is unsupported, using BIOS configuration
>> |[    1.156585] pci 10000:e1:00.0: can't override BIOS ASPM; OS doesn't have ASPM control
>> |[    1.300059] r8169 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
>> 
>> In addition, with commit 2ab19de62d67 in kernel regular messages like
>> this show up:
>> 
>> |[ 7487.214593] pcieport 0000:00:1c.2: AER: Corrected error received: 0000:03:00.0
>> 
>> I'm happy to test any patches or provide more info if needed.
>> 
> Thanks for the report. It's interesting that the issue seems to occur only on systems
> where BIOS doesn't allow OS to control ASPM. Maybe this results in the PCI subsystem
> not properly initializing something.
> Kurt/Klaus: Could you please boot with cmd line parameter pcie_aspm=force and see
> whether this changes something?
> This parameter lets Linux ignore the BIOS setting. You should see a message
> "PCIe ASPM is forcibly enabled" in the dmesg log with this parameter.

Seems like this does not help. There are still PCIe errors:

|~ # dmesg | grep -i ASPM
|[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.4.2-gentoo-kurtOS root=/dev/nvme0n1p3 ro kvm-intel.nested=1 vga=794 pcie_aspm=force
|[    0.044016] Kernel command line: BOOT_IMAGE=/vmlinuz-6.4.2-gentoo-kurtOS root=/dev/nvme0n1p3 ro kvm-intel.nested=1 vga=794 pcie_aspm=force
|[    0.044048] PCIe ASPM is forcibly enabled
|[    0.153011] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
|[    0.916341] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
|[    0.917719] acpi PNP0A08:00: FADT indicates ASPM is unsupported, using BIOS configuration
|~ # dmesg | grep -i r8169
|[    1.337417] r8169 0000:03:00.0 eth0: RTL8168h/8111h, 6c:3c:8c:2c:bd:de, XID 541, IRQ 164
|[    1.337422] r8169 0000:03:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
|[    2.833876] r8169 0000:03:00.0 enp3s0: renamed from eth0
|[   20.886564] Generic FE-GE Realtek PHY r8169-0-300:00: attached PHY driver (mii_bus:phy_addr=r8169-0-300:00, irq=MAC)
|[   21.168373] r8169 0000:03:00.0 enp3s0: Link is Down
|[   24.006543] r8169 0000:03:00.0 enp3s0: Link is Up - 1Gbps/Full - flow control off
|~ # dmesg | tail
|[   20.886564] Generic FE-GE Realtek PHY r8169-0-300:00: attached PHY driver (mii_bus:phy_addr=r8169-0-300:00, irq=MAC)
|[   21.168373] r8169 0000:03:00.0 enp3s0: Link is Down
|[   24.006543] r8169 0000:03:00.0 enp3s0: Link is Up - 1Gbps/Full - flow control off
|[   24.006568] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
|[   24.567803] ACPI Warning: \_SB.PC00.PEG1.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20230331/nsarguments-61)
|[   41.563396] pcieport 0000:00:1c.2: AER: Corrected error received: 0000:03:00.0
|[   47.065441] pcieport 0000:00:1c.2: AER: Multiple Corrected error received: 0000:03:00.0
|[   54.264285] pcieport 0000:00:1c.2: AER: Corrected error received: 0000:03:00.0
|[   54.424210] pcieport 0000:00:1c.2: AER: Corrected error received: 0000:03:00.0
|[   55.443439] pcieport 0000:00:1c.2: AER: Corrected error received: 0000:03:00.0

Thanks,
Kurt