Same problem with a Kubuntu 10.04 Lucid Lynx 64-bits fully upgraded.
It happens like each 1 of 2 boots. Mostly the first time I try to boot it crash and then it works after rebooting.
----------------
Linux karmapolice 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010 x86_64 GNU/Linux
Nvidia GeForce 9800 GT
Athlon Athlon 64 X2 3800+
----------------
Same problem with a Kubuntu 10.04 Lucid Lynx 64-bits fully upgraded.
It happens like each 1 of 2 boots. Mostly the first time I try to boot it crash and then it works after rebooting.
----------------
Linux karmapolice 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010 x86_64 GNU/Linux
Nvidia GeForce 9800 GT
Athlon Athlon 64 X2 3800+
----------------
PD: Could it have something to do with this old and solved bug https:/ /bugzilla. redhat. com/show_ bug.cgi? id=323501 reported by Linus Torvalds for Fedora 8?