You can disable ACPI by booting with the acpi=off kernel parameter.
I have a few questions:
0) Why are you using the ConnectedMonitor option? Does removing it have any impact?
1) Does this problem persist if you're not using the Composite extension and/or the Triplebuffer option?
2) If you set NvAGP to 0 in xorg.conf, does that have any impact on the problem?
3) Specifically which motherboard are you using, and which BIOS version?
I'm following the other threads as well.
acpi=off makes things a little better, but it still locks up.
I tried all the things in the stability sticky, but I duess since this is a single core cpu, nothing happened.
1)Disabling triple buffering made the lockups more frequent, but they actually unlocked more often.
2)Did this the same time as triple buffering
3)Not sure, dell inspiron 4100, old school.
I'm attaching a new bug report for my feisty install, though it is pre lockup. also i couldn't get startx --logverbose 6 to work, it complained about a font or something.
I'm also including some of my kern.log because there was some interesting nvidia soft lock messages.
Thanks to anyone who looks.