I'm beginning to think more and more that this is a problem with overheating. I think my ACPI thermal zone trip points are way off.
critical (S5): 100 C
passive: -248 C: tc1=4 tc2=3 tsp=60 devices=0xc17fc338
active: -266 C: devices=0xc17fcdec
Those negative values look way off. Can somebody who knows something about this suggest what they should be?