I can confirm exactly same bug with Gutsy Gibbon Tribe 2 June 27 2007.
xorg.log for machine exhibiting this problem attached
10 sparkling vertical lines in blue/green when using i810 driver on
Compaq Deskpro i815.
Looks a lot like video memory is being mis-mapped, or memory used for
video is also being used for graphics driver scratch pad.
Following resolutions tested and OK:
1024x768 24bpp
1280x768 16bpp
Problem resolution:1280x1024 24bpp.
When booting Gutsy directly from live CD with higher res monitor, this
problem manifests itself.
lspci -v :
00:02.0 VGA compatible controller: Intel Corporation 82815 CGC [Chipset
Graphics Controller] (rev 02) (prog-if 00 [VGA])
Subsystem: Compaq Computer Corporation Unknown device 001a
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
Memory at 44000000 (32-bit, prefetchable) [size=64M]
Memory at 40400000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [dc] Power Management version 2
Tested with both TFT and CRT screens.
** Attachment added: "xorg.log for machine showing problem"
http://launchpadlibrarian.net/8262482/Xorg.0.log-i815-shimmering-lines
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Vertical green lines bands in 24-bit on Compaq Deskpro (i815)
https://bugs.launchpad.net/bugs/32716
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