Comment 189 for bug 561802

Just an update to post #182, I was able to restore functionality only by reinstalling from the 10.04.1 ISO distribution image that had the 2.6.32-24 kernel.

I used meld to compare my two machines running 2.6.32-25, the one that was broken had been updated to 2.6.32-26 by update manager, then I tried to go back to 2.6.32-25. This left slight differences (0.1 rev) in Xorg and Plymouth that maybe were related to this bug. Anyway, there was no way I could find to get back to the state where the internal monitor would come on without plugging in an external monitor, even under previous kernels linked by grub and the recovery modes.

The version of plymouth on the working machine was 0.8.2-2ubuntu2, the broken was 0.8.2-2ubuntu2.1
the version of Xorg on the working machines was xserver-common 2:1.7.6-2ubuntu7.3 and broken version was 7.4. Similarly grub had slight differences version 1.98-1ubuntu7 to 1.98-1ubuntu8. From what I can tell by reading various wikis, hard to image much else video related other than plymouth and xserver is running at the time the splash screen goes dark after grub menu. Plugging in a monitor during the plymouth splash or the login screen instantly would restore the internal display.

Looking forward to hearing some more test reports of the ppa kernel post and bios fix of previous two posts. I may be able to dedicate one machine to testing later this week.