Comment 68 for bug 270798

I am having this problem too, on Karmic 9.10, 2.6.31-19-generic-tuxonice #56~ppa1-Ubuntu SMP Thu Feb 4 10:56:23 UTC 2010 x86_64. Machine is Acer Aspire Timeline 3810T-6775.

Besides installing tuxonice kernel (and fbsplash tuxoniceui) a few days ago I edited the broken laptop-mode script /usr/share/laptop-mode-tools/modules/wireless-iwl-power today as described here: https://bugs.launchpad.net/ubuntu/+source/laptop-mode-tools/+bug/508938 to properly enable power management on my intel 5100 wifi.

Since this is my most recent change and hpet-related system freezes have only happened so far while unplugged (turning iwlagn power management on) I suspect it may have to do with iwlagn or laptop-mode I also have to use backports wireless module for power saving, even though it yeilds generally abysmal b/g/n speeds.

My system only shows one hpet message before applications start to segfault, sometimes quite a bit later (happened with Virtualbox, NetworkManager and a few other programs):
Feb 10 14:25:38 xuphoria kernel: [14091.043420] CE: hpet increasing min_delta_ns to 22500 nsec
Feb 10 14:29:08 xuphoria pulseaudio[2716]: ratelimit.c: 8 events suppressed
Feb 10 14:43:54 xuphoria kernel: [15186.721736] npviewer.bin[3597]: segfault at 430 ip 00000000f61a8776 sp 00000000ffeab3a8 error 6 in libflashplayer.so[f5f70000+a71000]
Feb 10 14:56:54 xuphoria kernel: [15967.262654] npviewer.bin[16560]: segfault at 430 ip 00000000f60d5776 sp 00000000ffab6288 error 6 in libflashplayer.so[f5e9d000+a71000]

Or it's the last thing logged before I get the dreaded black screen with blinking cursor and must cold-boot:
Feb 10 22:09:04 xuphoria kernel: [14456.583461] CE: hpet increasing min_delta_ns to 15000 nsec
Feb 10 22:23:01 xuphoria kernel: imklog 4.2.0, log source = /var/run/rsyslog/kmsg started.

Any ideas?? I will try hpet=disable or clocksource=jiffies. Not really sure where to post this bug...