video artifacts in Intel 945GSE (atom chipset) dual monitor VGA output

[jsass]

Testing Karmic Koala's newest release with a http://www.disklessworkstations.com 1520 term via LTSP. The Intel drivers work properly with both DVI and VGA outputs run singularly. However, once running dual monitors, strange artifacting can be seen on the VGA output monitor. Once past LDM, the problem becomes more apparent. Upon opening a window, or even moving the mouse, the VGA output monitor's wallpaper appears to "tear", causing the monitor to be unusable while the mouse is moving. It appears to only be mouse movements and Xwindows changes that cause it. Working in a terminal is fine, but as a test I tried out the game Iagno (Othello/reversi). It caused the artifacts to appear whenever a piece was moved. Quite a different result from Nibbles, which caused no issues whatsoever.

"uname -a" returns the following:
Linux ubuntu 2.6.31-7-generic #27-Ubuntu <server time> i686 GNU/Linux

[Jesse Barnes (jbarnes-virtuousgeek)]

I think this is a dupe of https://bugs.freedesktop.org/show_bug.cgi?id=23368, can you try the patch in that bug and confirm?

[jsass (sass-joel)]

Testing Karmic Koala's newest release with a http://www.disklessworkstations.com 1520 term via LTSP. The Intel drivers work properly with both DVI and VGA outputs run singularly. However, once running dual monitors, strange artifacting can be seen on the VGA output monitor. Once past LDM, the problem becomes more apparent. Upon opening a window, or even moving the mouse, the VGA output monitor's wallpaper appears to "tear", causing the monitor to be unusable while the mouse is moving. It appears to only be mouse movements and Xwindows changes that cause it. Working in a terminal is fine, but as a test I tried out the game Iagno (Othello/reversi). It caused the artifacts to appear whenever a piece was moved. Quite a different result from Nibbles, which caused no issues whatsoever.

"uname -a" returns the following:
Linux ubuntu 2.6.31-7-generic #27-Ubuntu <server time> i686 GNU/Linux

[jsass (sass-joel)]

Retrieved from client -- Xorg.7.log

[jsass (sass-joel)]

Retrieved from client -- LSHW output

[jsass (sass-joel)]

Client image uname -a reports as follows:

Linux <client name> 2.6.31-5-generic #24-Ubuntu <server time> i686 GNU/Linux

[jsass (sass-joel)]

UPDATE: due to the incongruent kernels, the video problem may have presented itself. After ltsp-update-kernels, the problem was fixed.

[jsass (sass-joel)]

Problem was incongruent kernel versions between client image and server

[jsass (sass-joel)]

Problem was due to incongruent kernel versions between client and server. ltsp-update-kernel fixed the issue.

[jsass (sass-joel)]

Incongruent kernel versions between ltsp server and ltsp image were to blame. ltsp-kernel-update fixed the issues