[CentOS] Problems after update to 5.5

On Sat, 2010-05-15 at 12:27 +0100, Colin Coles wrote:
> Hi,
>  I have updated 8 machines so far and 2 are refusing to boot on 
> 2.6.18-194.3.1.el5 kernel, they just hang at: 'Starting udev:' but when I 
> revert to 2.6.18-164.15.1.el5 kernel they boot fine. Any pointers?

I just updated a machine and also got a hang at udev. When I revert to
kernel 2.6.18-164 it works fine. It appears to be a hard hang. Caps lock
and num lock have no effect and I have to hit the reset button.

I tried increasing udev log level to debug and it did not hang. I
reduced the log level to info and it still did not hang. However, when I
start X, esd seems to get stuck in a loop on a short segment of audio.
If I kill esd, the desktop will finish initializing. Logging out of X
also hung, but killing X manually worked. I have reverted to the old
kernel.

Linus