[Bug 220237] Bluetooth: MediaTek MT7925 (0e8d:7925) fails to load firmware with timeout (-110)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220237

jens.nitschke@mailbox.org changed:

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                 CC|                            |jens.nitschke@mailbox.org

--- Comment #4 from jens.nitschke@mailbox.org ---
Device: HP OmniBook X Flip 14-fk0178ng
BIOS: F.10 (2025-10-22)
OS: CachyOS (Arch-based)
Kernel: 7.0.3-1-cachyos
WiFi/BT chip: MediaTek MT7925 (PCIe ID: 14c3:7925, Subsystem: 8c38)
I can confirm this issue on my device. The Bluetooth USB interface never
enumerates successfully. WiFi works fine via mt7925e driver.
Key symptoms from dmesg:

usb 3-5: device descriptor read/64, error -110
xhci_hcd 0000:65:00.0: Timeout while waiting for setup device command
usb 3-5: device not accepting address, error -62

The BT device never appears in lsusb or rfkill. No hci0 interface is created.
Workarounds that had no effect:

pcie_aspm=off
usbcore.autosuspend=-1
xhci_hcd.quirks=0x80000
Early loading of mt7925e via initramfs
linux-firmware up to date, firmware files present in
/lib/firmware/mediatek/mt7925/

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