This model of thinkpad has 8 levels of fan control:
0=off,
1-2 = 1900 RPM
3-5 = ~3000 RPM,
6-7 = ~3500 RPM
and a disengaged mode works at ~5100 RPM
The 6-7 level @ 3500 RPM should be enough to dissipate heat generated by
a loaded CPU. The fact that your fan is running at 3500 RPM is
indicating that the fan control is correctly enabling the highest fan
control level (6-7) and even that is not enough to dump all the heat out
of the laptop. Also, thermald should be actively throttling back the
CPU as a passive mode control, so this should also help reduce the
overheating. The fact that this seems to be occurring across a wide
range of kernel versions suggests to me that that perhaps this is
hardware related, for example, is the thermal paste between the CPU and
the thermal pipe/fan unit working correctly?
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https://bugs.launchpad.net/bugs/1491797
Title:
Shuts down when supposed to suspend as a reaction to self-caused
overheat, session lost
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