Random xrandr behaviour

[Magnus Kessler]

With uptodate git versions of xrandr, xserver, mesa and the intel driver I 
observe a random behaviour of xrandr.

In the same session the output of xrandr randomly switches between

$> xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
VGA connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm 
x 270mm
   1280x1024      60.0*+   75.0     60.0*
   1152x864       75.0
   1024x768       75.0     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3     56.2
   640x480        75.0     72.8     66.7     59.9
   720x400        70.1

and

$> xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
VGA disconnected 1280x1024+0+0 (normal left inverted right x axis y axis) 
338mm x 270mm
  1280x1024 (0x3c)  108.0MHz
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock 
64.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock 60.0Hz

I also observe a more or less pronounced flickering of the screen when 
xrandr is run.

I wonder if the observed behaviour may have the same root cause as the 
crashes observed with SDL applications when they try to obtain mode lines 
[0] [1].

Can someone please advise how I could track down this issue further?

Regards,

Magnus Kessler

[0] http://bugs.freedesktop.org/show_bug.cgi?id=17431
[1] http://bugs.freedesktop.org/show_bug.cgi?id=13952
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