http://bugs.freedesktop.org/show_bug.cgi?id=22494
Summary: Black screen in OpenGL app with dual head in extend mode
Product: Mesa
Version: unspecified
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/i915
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: kaou...@crazydwarves.org
Created an attachment (id=27162)
--> (http://bugs.freedesktop.org/attachment.cgi?id=27162)
xorg logs
Hello,
I am using the intel driver 2.7.1 with libdrm 2.4.9 and xorg server 7.4
(kubuntu jaunty with backports of drm and intel driver
http://ppa.launchpad.net/ubuntu-x-swat/ppa/ubuntu/).
I am using the opengl application impressive
(http://impressive.sourceforge.net).
I tried it in different configuration, all of these worked with the driver
version 2.6.3 with libdrm 2.4.5:
* one screen, 1280x800, impressive in fullscreen: works, good accel
* two screen, clone mode, 1024x768, impressive in fullscreen: works, bad accel
* two screen, extend mode, 2048x768, impressive at 1024x768: works, bad accel
* two screen, extend mode, 2048x768, impressive at 2048x768: black screen
* two screen, extend mode, 2048x768, impressive at 2040x768: works, bad accel
Apart the fact that when there is two screen, the acceleration is bad (not very
fluid, not really usable), it looks like that with a resolution of 2048x768, it
doesn't work.
Also if I choose 2047 for example, I get strange results (the image is
distorted and it crashes soon after launching).
I attach my xorg logs.
Thanks.
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