[Bug 29787] New: random XRandR failures (i2c related?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29787

           Summary: random XRandR failures (i2c related?)
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: aelschuring at hotmail.com


A few weeks ago, X started displaying weird errors during normal use. These
range from simple output resets to application crashes due to X BadAlloc
responses. In detail, this is what I see happening:

- output blink. Usually the screen goes dark for about a second. When the
screen returns, I see either:
- display position getting cancelled (xrandr --pos 0x0) on my left screen
  when this happens I can usually get it back to the correct position via the
xrandr command line tool, but sometimes that triggers a WM crash
- display rotation getting cancelled (xrandr --rotate normal) on the right
screen. When this happens:
  - quodlibet (python-gtk app) crashing with BadAlloc (serial 255 error_code 11
request_code 53 minor_code 0). It will keep crashing like this until I restart
X
  - whatever other app I had running on the right screen has disappeared as
well
  - window manager (e17) crashing. It can recover succesfully, though
  - when I re-enable screen rotation, the display gets completely garbled

I have started seeing this happen with 2.6.35-rc3 (was running 2.6.34-rc6
before that), and with 2.6.35.1 this happens a lot less frequently (from once a
day to twice in a week).