Comment 38 for bug 228624

To follow up, I did extensive testing on my new laptop (Thinkpad T61 model 7658-CTO).

I installed the following distros:

1) Mandriva 2008 Spring
2) Fedora 9
3) Debian Lenny
4) Debian Sid (upgrade from Lenny as this is the only way)
5) OpenSuSE 11
6) Ubuntu 8.04 - Hardy
7) Ubuntu 7.10 - Gutsy

I had three criterion for the distributions to stay on the laptop and they were as follows: 1) Brightening/dimming the laptop screen *must* work properly, 2) Wifi should be at least detected on the laptop and finally, 3) DVD playback must work.

Of these, only Ubuntu(8.04 and 7.10) passed brightening/dimming (1), most passed wifi detection with Fedora and Ubuntu working best, and all EXCEPT Ubuntu 8.04 worked for dvd playback.

The laptop presently has Gutsy on it as it was the one best fitting my needs.

From the above test, which took forever, you can see that this is definitely something wrong with Hardy. I'm not sure what, but I'll bet the kernel. The all_generic_ide=1 fix does not work with my laptop. The problem still manifests itself regardless of fixes attempted. Short of reverting kernels to a Hardy beta kernel, I have no option but to use a different distribution. That is, the last three kernels do not work with dvd playback.