Ubuntu
linux package

  1. Bug #751689
  2. Comment #53

Comment 53 for bug 751689

Revision history for this message
KC (kc00) wrote : Re: ThinkPads overheat due to slow fans when on 'auto'

This appears to affect me on an X220 i7, 11.10 Oneiric.

This bug seems to relate to the OS and not firmware for me. I was on 11.04 previously and did not have a problem. During high-load the fan would spin to a high RPM (don't know how fast since I never had reason to check it but certainly faster than on 11.10).

After upgrading to 11.10 I almost instantly found that the laptop becomes too hot to hold during high-load. Agree with others finding that "auto" mode will only run the fan at around ~4500rpm whereas "disengaged" will go to ~6300rpm.

4500rpm will allow the CPU to reach ~99/100C. 6300rpm will keep it < 80C while running the same workload.