So I turned off speedstep, and so far no crashes, but I will report if that changes. I also had to disable CPU frequency scaling under ubuntu (powernowd) because it was occuring anyway (?). /sys/ devices/system/cpu/cpu*/cpufreq/scaling_governor must be set to "performance".
Interestingly, my processor only goes to 900MHz under ubuntu now, even though this is an Intel Core 2 Duo 6600 (2.4GHz); setting the CPU frequency manually to 2400000 only got it to 900MHz...
So I turned off speedstep, and so far no crashes, but I will report if that changes. I also had to disable CPU frequency scaling under ubuntu (powernowd) because it was occuring anyway (?). /sys/ devices/ system/ cpu/cpu* /cpufreq/ scaling_ governor must be set to "performance".
Interestingly, my processor only goes to 900MHz under ubuntu now, even though this is an Intel Core 2 Duo 6600 (2.4GHz); setting the CPU frequency manually to 2400000 only got it to 900MHz...