Comment 2 for bug 446421

We are not expecting KMS to be stable for all ATI cards in 2.6.31 and not enabling it there by default for Karmic. That said if it worked on 2.6.31-11.38 then I am supprised it does not do so on .41 as I cannot see any radeon changes in the kernel between those two versions.

Can we try booting the .41 kernel without modeset enabled and without quiet to see if we get to see something prior to the panic. Also there was one tty related panic in .41 which was fixed in subsequent kernels. So does this occur with the latest available kernel .42 and later? Again if it occurs with modeset can we try booting without modeset and without quiet there.

Please report back here. Thanks.