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User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.8.1) Gecko/20061010 Firefox/2.0

Description of problem:
with kernel 2.6.20-1.3104 everything works fine. 
i installed f7test4 from the life cd, installed the nvidia driver from freshrpms and made an "yum update". with the new kernel the system hangs after boot and only keyboard leds a blinking.
with standart nv driver its the same.
the system hangs after different times (sometimes 1 minute sometimes 10 minutes)

in /var/log/messages sometimes there is a error message before the system hangs:

setroubleshoot: [rpc.ERROR] attempt to open server connection failed: (2, 'Datei oder Verzeichnis nicht gefunden')

i disabled selinux und setroubleshoot but its still the same

Version-Release number of selected component (if applicable):
kernel-2.6.21-1.3116.fc7

How reproducible:
Always


Steps to Reproduce:
1. just boot with 2.6.21-1.3116 kernel
2.
3.

Actual Results:
after a few minutes the system hangs

Expected Results:
system should not hang

Additional info: