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[Launchpad Bug Tracker <307253@xxxxxxxxxxxxxxxxxx>]

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I don't know if this is an xserver-xorg-video-intel issue, or a kwin
issue, or some other issue. I also don't know if it is the same bug as
Bug #146298, or Bug #146859, or Bug#207770. Feel free to reclassify as
necessary.

I am running on an Intel DQ45CB (Intel Q45, integrated X4500 graphics)
with a dual-head display set up (1280x960+0+0, 1280x1024+1280+0), non-
Xinerama, in a fresh install of Kubuntu 8.10. The "Virtual" setting in
Xorg is "2560 1024" and this seems to all be fine. However, when a
window on the desktop is dragged out beyond 2048 pixels in width (which
corresponds to GL_MAX_TEXTURE_SIZE according to glxinfo -l), it turns
black. Interestingly (or not), the shadow on the box continues to
display properly, and the compositing continues to work fine (eg. when I
drag the window, it still turns partially transparent): only the content
of the window disappears. The window stays black even if I drag it off-
screen so that less than 2048 columns of the window are actually being
drawn to the screen. This is not a huge issue but it is a little weird
to have window content disappear, and as monitor resolutions continue to
increase this is going to become a more significant issue.

Please let me know if additional information is needed.

00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Intel(R) Q45/Q43 20061102
OpenGL version string: 1.4 Mesa 7.2

Regards,

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New

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Windows larger than GL maximum texture size (2048) turn black / blank
https://bugs.launchpad.net/bugs/307253
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