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SubjectRe: CPU overheat with 2.2
Simon Richter writes:
> I just switched my brother's computer to a 2.2 kernel, and now the CPU
> overheats under Linux after about half an hour (reproducible). It works
> fine under Windows 95b and worked under Linux 2.0.38.
>
> CPU is a Pentium 166 MMX on an Asus TX97 mainboard, ISA cards are a 3c509
> and a Soundblaster.
> ...
> CONFIG_APM=y
> CONFIG_APM_DO_ENABLE=y
> CONFIG_APM_CPU_IDLE=y
> CONFIG_APM_DISPLAY_BLANK=y

Try leaving CONFIG_APM_CPU_IDLE unset. I've learned the hard way that this
option doesn't do any good on many boards, and actually can _increase_ the
CPU temperature by preventing Linux' ordinary "hlt when idle" from triggering.
My ASUS P3B-F + PIII dropped 10+ degrees C when I unset CONFIG_APM_CPU_IDLE.
YMMW, of course.

/Mikael
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