Ubuntu
xserver-xorg-input-evdev package

  1. Bug #343528
  2. Comment #31

Comment 31 for bug 343528

Revision history for this message
In , Peter Hutterer (peter-hutterer) wrote :

Created an attachment (id=30107)
0001-Finalize-the-middle-button-emulation-when-a-read-err.patch

I think this should fix it. If I read the log right, the necessary steps to reproduce the bug are:

get a read error ENODEV on the device, hope that the reopen timer manages to find the device again if it comes back. Then really remove the device, possibly multiple times. Look out for a message like this in the log:

[32099.630886] (EE) HID 062a:0000: Read error: No such device
[32100.187449] (II) HID 062a:0000: Device reopened after 5 attempts.

If that message occurs, removing the device and re-adding should lead to a crash. The read error seems to be quite difficult to trigger, hence why I haven't been able to reproduce it myself. I would explain why removing the kernel module seems to work quite well.

Anyway, in the code, what happens is that in this case the reopen timer isn't removed. When the device is reopened, the timer is overwritten and the old one hangs around, eventually crashing the server.

Please test this patch and let me know if it works.