As an experiment, I removed the powerclamp driver and monitored the temp
sensors. The GPU never got close to high. The CPU has two thresholds,
high of 86 C and critical of 100 C. With the powerclamp driver, the idle
injection always kicked in at 86. Without, the temp stayed at around 99
C, never ev
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
The fans are working fine, although maybe not as fast as before, and the
top tasks are java as expected.
There is something here that is new behavior, but I can't quite pin what
it is. Either:
1. The older kernels did not protect the CPU from overheating.
2. The older kernels used a different for
I found a workaround by rmmod intel_powerclamp. This removed the
kidle_inject threads and the speed was returned to normal.
However, I looked at my CPU temperature, and it was 87 deg C, over the
high threshold. It is possible that the idle injection is a new kernel
feature that is kicking in to pr
There are no warnings whatsoever in my syslog file about thermal
temperature.
I do see this message that seems to correspond with the slowdown:
intel_powerclamp: Start idle injection to reduce power
I have tried the 3.18.0-031800rc3-generic kernel. After running for a
few minutes, I did not
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1389077
Title:
Intel Powerclamp is Slowing CPU
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Public bug reported:
I upgraded from KUbuntu 14.04 to 14.10. Immediately, while playing
minecraft with my daughter, I noticed the game was running very slowly.
Even after closing the game, my web browsing slowed to a crawl.
Looking at the processes in top, I noticed there were 4 tasks called
kidl
