Hey Mathias,
On 04-04-16 13:30, Mathias Nyman wrote:
On 04.04.2016 12:06, Olliver Schinagl wrote:
Hi list,
I have a Apple Inc. MacBookPro11,1 (with the most recent 'bios': BIOS
MBP111.88Z.0138.B16.1509081438 09/08/2015).
At the beginning, USB worked normally. After a while (and after newer
kernel versions released by debian?) things started to act strangely.
For one, the bios/efi boot takes a very long time (probably due to
the same reason I describe later) just to get to the bootloader/grub.
Likley resetting and probing for USB ports/mass storage. When grub
finally pops up, I can use the (internal USB based keyboard) normally
to select a grub entry etc.
Booting the kernel then works reasonably fine, until it loads the
xhci module.
It spews some messages in dmesg (taking some 15 seconds) and only
then, the keyboard starts to work again.
The log is filled with messages like:
[ 7.248479] xhci_hcd 0000:00:14.0: Command completion event does
not match command
[ 7.248495] xhci_hcd 0000:00:14.0: Timeout while waiting for setup
device command
[ 12.256347] xhci_hcd 0000:00:14.0: Timeout while waiting for setup
device command
[ 12.256363] usb 1-2: hub failed to enable device, error -62
[ 17.264166] xhci_hcd 0000:00:14.0: Timeout while waiting for setup
device command
(followed by USB hub/device enumeration)
Could be related to the usb wide -> per bus locking changes.
xHCI handles both a usb2 and usb3 bus.
There's a possible fix here:
http://marc.info/?l=linux-usb&m=145493945408601&w=2
I will try this fix and report on its success, the only things I can say
now is that you mention a 6% failure rate of all boots, but what I am
seeing is 99.9% failure rate :)
But the kernel is compiling so i'll report back when I find anything
interesting.
Olliver
Does it help?
-Mathias
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