[Bug 222049] xhci_hcd: USB device on onboard port fails to enumerate (error -110/-71), delays boot around 70s on ASUS ROG Strix X870-F

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=222049

Michał Pecio (michal.pecio@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |michal.pecio@gmail.com

--- Comment #1 from Michał Pecio (michal.pecio@gmail.com) ---
Did this device ever work in the past?

It's probably Mediatek Bluetooth, they get stuck in such state and need a
standby power cycle to recover (disconnect the PC from power for a minute). I
recall some discussion about this on linux-bluetooth, but not sure how far it
went. IIRC some users had luck blacklisting btusb (which implies that the
driver puts the device in the bad state), or maybe it was with Realtek chips,
not sure. Others found that some BIOS settings like "ErP ready" cut power to BT
during standby and thus "fix" this device automatically.

IIRC the delay itself is not the kernel's fault - userspace started quickly,
but then it chooses to wait long time for enumeration to complete (or fail).

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.