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[taiebot65 <taiebot65@xxxxxxxx>]

Ok we ve got someone in our forum http://www.glx-dock.org/bg_topic.php?t=4300&pos=0#mess_56273
which got exactly the same behaviour and this has been tested under lucid. He is not using the same chipset as me (i945 for my self and  GMA3100 for him).

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[i945gm] Opengl is unstable with cairo-dock drmWaitVBlank returned -1
https://bugs.launchpad.net/bugs/428900
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Status in Cairo-Dock : Core: Confirmed
Status in “mesa” package in Ubuntu: Incomplete
Status in “xserver-xorg-video-intel” package in Ubuntu: Invalid

Bug description:
Binary package hint: xserver-xorg-video-intel

I have been testing cairo-dock for quite a while now and the opengl as always been unstable for me.
 When i was testing Jaunty, in alpha 6 i managed to get a full working dock in opengl mode for 2 days since then it never worked fully again.
I am back in Karmic to test the drivers and hopefully fix this unstable opengl.

I am using xorg edgers and i have noticed a great amelioration but OPengl version failed because after some use the background turn to white.

I think it s related to this debug 

 do_wait: drmWaitVBlank returned -1, IRQs don't seem to be working correctly.

I am attaching a video of the problem..

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
    	Subsystem: Gateway 2000 Device [107b:0366]