My GPU seems fine, well under the high threshold. I can see what the
logic is of throttling the CPU because the GPU is overheating--if the
CPU is throttled then less data is being fed to the GPU so the GPU is
indirectly slowed. But you're right, reducing the CPU by half is
overkill. And that seems to be my problem as well. Without the
powerclamp, my temperature goes slightly over the high threshold, maybe
87 deg with a threshold of 85 degrees, but the idle goes at 50% for
quite some time.
I don't want to remove the powerclamp driver, since I don't want my CPU
to overheat. But 50% CPU reduction to control temperature that is
slightly exceeding the max makes my machine unusable.
Looking at the documentation for the powerclamp technology and the proc
values, it looks like any level under 50% can be selected. I don't think
it is powerclamp itself choosing the value, so there must be some
thermal protection module that is choosing all or nothing. It really
should gradually start injecting until the temperature is acceptable,
IMO.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1389077
Title:
[HP ProBook 4530s] Intel Powerclamp is Slowing CPU
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