Random usb failure at bootup
Hi,
this morning I experienced a bad issue that worried me for a while, but
happily it ended well with no consequences.
After resuming from suspend, the monitor was black, and I had to press the
power button to hard shutdown the computer.
On reboot, the monitor still didn't switch on. I tried several times. In the
last tries the monitor switched on, but the keybord still didn't work. This
affected the boot loader as well. The system booted up, and I got the login
screen, however no key worked (apart from the power button, it's a MacBookPro
12,1).
I brutally switched off the laptop, and leaved off for some time (1 hour).
When I tried and rebooted it, everything worked well again.
I inspected the kernel messages, and found the following usb errors (keyboard
and monitor are USB devices on the MacBookPro 12,1):
====
Mar 29 09:06:25 alan kernel: usb 2-3: device not accepting address 2, error
-62
Mar 29 09:06:36 alan kernel: usb 2-3: device not accepting address 3, error
-62
Mar 29 09:06:55 alan kernel: xhci_hcd 0000:00:14.0: Stopped the command ring
failed, maybe the host is dead
Mar 29 09:06:55 alan kernel: xhci_hcd 0000:00:14.0: Abort command ring failed
Mar 29 09:06:55 alan kernel: xhci_hcd 0000:00:14.0: HC died; cleaning up
Mar 29 09:06:55 alan kernel: xhci_hcd 0000:00:14.0: HC died; cleaning up
Mar 29 09:06:55 alan kernel: xhci_hcd 0000:00:14.0: HC died; cleaning up
Mar 29 09:06:56 alan kernel: usb 2-3: device not accepting address 4, error
-108
Mar 29 09:06:56 alan kernel: usb usb2-port3: couldn't allocate usb_device
====
It seems that some rest is sometimes needed ;-)
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