Problems with kernel-2.6.26 and 2.6.27-0.x.rc2

[Dave Airlie]

On Sat, 2008-08-30 at 08:31 +0200, Joshua C. wrote:
> 2008/8/29 Joshua C. <joshuacov at googlemail.com>:
> > I have a strange problem with the 2.6.26 series kernel. 2.6.27-rc1
> > branch is ok but the same thing happens with 2.6.27.rc2 and the
> > following. 2.6.25 branch is ok.
> > I filed a bug report here https://bugzilla.redhat.com/show_bug.cgi?id=458901.
> >
> > The kernel loads fine until showing "starting udev". then it just
> > stops and cannot continue. on the 2.6.26 branch i need to keep pressed
> > atleast one key for it to continue. Then it goes further and
> > everything freezes when no key is pressed.
> > 2.6.27.rc1 was ok but the same thing showed in 2.6.27.rc2 onwards.
> > with the lastes kernel-2.6.27-0.287.rc4.git7.fc10 after "startig udev"
> > I get black and white stripps on my screen and only hardware reset
> > helps. This makes me think it is something connected with the kernel
> > modesetting and my radeon gpu. It could also be udev but it is fine
> > with 2.6.25 and if i keep at least one key pressed then 2.6.26 works
> > fine. in everycase dmesg shows nothing. What could it be? How can I
> > see where the problem is?

So you have two problems.. one is a kernel module is loading and hanging
the boot process, this is usually blamed on udev, the fact that hitting
a key helps implies some interrupt handling problem maybe..

The other is the graphical boot not working properly on your card, for
that you can boot with nomodeset on the command line, if udev hangs that
is the other problem. For the graphical boot, I'd need to know the
graphics card and type of card, agp pci etc. and type of display plugged
in.

Dave.