Re: [-next regression] USB keyboard stops working occasionally

On 05/20/2012 12:39 AM, Greg Kroah-Hartman wrote:

On Sun, May 20, 2012 at 12:17:29AM +0200, Jiri Slaby wrote:

quoted

Hi,

sometimes, in the middle of writing, my USB HID keyboard stops sending
interrupts (no changes in /proc/interrupts). I have to hit a key on
another USB interface of that keyboard to resurrect the other. It
happens once or twice a day. It happens with -next since around Friday 4th.

I tried to bisect it a bit (three or four times because of fuzz) in the
past 3 weeks and my suspect number one is currently:
commit 3d9545cc375d117554a9b35dfddadf9189c62775
Author: Alan Stern [off-list ref]
Date:   Mon Apr 23 13:54:36 2012 -0400

    EHCI: maintain the ehci->command value properly

===

I'm currently running on -next 20120518 with that commit reverted for
one whole day and the issue seems to be gone.

Could you take a look and double-check that commit? (Or do you have any
other ideas where to take a look?)

Yes, we realized this a few days ago, and I committed a fix for this a
few hours ago to the usb-next tree, and should show up in the next -next
release.

I've included the patch below that should fix this problem, please let
me know if it doesn't for you.

FWIW after running the kernel a couple of days without a glitch I can
conclude that it is fixed now.

thanks,
-- 
js
suse labs