Xorg and intel graphics - instant crash: *ERROR* Potential atomic update failure on pipe A: -35

[Riccardo Mottola <riccardo.mottola%libero.it@localhost>]

Hi,

I was able to reproduce several times an immediate crash of Xorg.
I can open xterm... and if I want I can open many.
But if I open xterm and then do "Launch" from windowmaker's menu on 
xterm (which usually just launches another xterm) I get an Xorg crash. I 
relaunched Xorg and got the crash again.

In dmesg I see, however I am not sure this is the immediate cause of the 
crash - I have seen this error in dmesg without Xorg crashing.

[  1379.692811] kern error: 
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_sprite.c:132)intel_pipe_update_start] 
*ERROR* Potential atomic update failure on pipe A: -35
[  2496.820019] kern error: 
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_sprite.c:132)intel_pipe_update_start] 
*ERROR* Potential atomic update failure on pipe A: -35

I smell a bug here...  Intel graphics has issues, I noticed them on 
other systems too, but this I never had.

[     6.247928] i915drmkms0: interrupting at ioapic0 pin 16 (i915drmkms0)
[     6.297957] intelfb0 at i915drmkms0
[     6.297957] intelfb0: framebuffer at 0xffff8d8065070000, size 
1366x768, depth 32, stride 5504


Riccardo