Display DefaultDepth wrong after upgrading to Gutsy requires manual setting to 16bpp

[Piotr Kozłowski]

i was upgrading to gutsy from feisty on my old IBM i1300 laptop. after upgrade depth of my display was reduced to 8bpp (although DefaultDepth in /etc/X11/xorg.conf was set to 24). looked into Xorg logs, and i found that my card (driver: siliconmotion) should be able to display 32bpp, so i set that in xorg.conf. after x restart the screen was black, and all i could do was restart in rescue mode and switch to 16bpp. this solved the problem. nevertheless someone should fix that bug.

[Update]
Same problem here, after updating to gutsy my Amilo M (Silicon Motion SM720 Lynx3DM) runs awfully slow. The Xorg process took 100% CPU just to redraw a window.

To get rid of the corruptions and performance problems change in the /etc/X/xorg.conf from 24bit color depth to 16 bit color depth (Display Section).

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage. I have classified this bug as a bug in xorg.

[bugbot (bugbot)]

This bug report was filed against an old version of Ubuntu.
Can you confirm whether this is still an issue in natty?

If you don't mind, it would be very helpful if you could update the bug
report in launchpad to 'Fix Released' if it is no longer an issue for
you, or if it is still occurring under natty, please tag the bug 'natty'
so it's easier for us to track.

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.