Sorry guys, attention wandered and I got wrapped up in something else. That, and the problem seems to have stopped somehow... (Like the system finally recognized how fast the fan can run, or something... Darned if I know what's going on anymore...)
One of the sensors with the program T6 provided DOES match the Hardware Temperature Settings widget, and all the others were lower. I currently have battery reconnected and the plate on the bottom reinstalled. However, I have NOT reinstalled laptop-mode-tools.
As per coffeetime's request...
acpi -VBattery 0: Full, 100%
Battery 0: design capacity 8700 mAh, last full capacity 8250 mAh = 94%
Adapter 0: on-line
Thermal 0: ok, 56.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 85.0 degrees C
Thermal 0: trip point 1 switches to mode passive at temperature 82.0 degrees C
Cooling 0: Processor 0 of 10
Cooling 1: Processor 0 of 10
cpufreq-infocpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to
cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.67 GHz
available frequency steps: 1.67 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 1000 MHz and 1.67 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1000 MHz.
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.67 GHz
available frequency steps: 1.67 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: ondemand, conservative, powersave, userspace, performance
current policy: frequency should be within 1000 MHz and 1.67 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.67 GHz.
sensorsacpitz-virtual-0
Adapter: Virtual device
temp1: +57.0°C (crit = +85.0°C)
eeepc-isa-0000
Adapter: ISA adapter
fan1: 1300 RPM
So... I'm going to go ahead and mark this as [Solved?], I guess. System isn't spazzing out anymore, but T6 might be right about using an outdated Kernel. (Would've been nice if Synaptic had let me know that a new kernel was out, but I guess I'll manually have to keep an eye out for it.)