amd64/190061: Losing ability to click in X11

[Michael Danilov]

>Number:         190061
>Category:       amd64
>Synopsis:       Losing ability to click in X11
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 21 12:10:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Michael Danilov
>Release:        FreeBSD 9.2-RELEASE-p6 amd64
>Organization:
>Environment:
System: FreeBSD strutter 9.2-RELEASE-p6 FreeBSD 9.2-RELEASE-p6 #0: Fri May 16 08:44:01 YEKT 2014 root at strutter:/usr/src/sys/amd64/compile/STRUTTER amd64

>Description:
	X11 stops responding to mouse buttons once in a while, usually after freezes caused by heavy disk I/O. xev(1) shows events from neither mouse buttons, nor "clicks" made using xdotool(1).
>How-To-Repeat:
	Start a job that requires a lot of memory and causes swapping. Use any mouse-reliant program and wait for the freeze. After it, the pointer will be unable to click.
>Fix:
	Restarting X. In about one percent occurences, randomly moving the cursor around, clicking and typing returns it back to normal.
>Release-Note:
>Audit-Trail:
>Unformatted: