I hit this bug on a Dell Latitude E5510, up-to-date BIOS version
installed.
I'm running up-to-date ubuntu 12.04.4 with last hardware-enablement stack
installed (uname -a:
Linux i306l 3.11.0-17-generic #31~precise1-Ubuntu SMP Tue Feb 4 21:25:43 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux).
For me, the problem occurs, when I watch some video using adobe flash
for some time (e.g. 10 minutes). Then, my laptop slows down extremely,
even after killing the browser (firefox or chromium). top shows 95%
idle, but the system still performs very bad.
However, the reason for all the problems seems to be the audio codec
problem.
after setting everything to "good", powertop shows:
Auslastung Gerätename
6,6% CPU use
100,0% Audiocodec hwC0D0:IDT (pulseaudio )
Note that I currently don't play any audio, but still get 100% audio
codec usage.
It takes about 30-40 minutes until the system is getting faster again.
Could be a temperature issue. The reason for the temperature problems
seems to be the audio codec bug.
As my system is very different to the samsung system, I guess it's not a
BIOS issue.
As the problems exists for 1-2 years now, it's an old one. I don't
expect it's solved in Kernel 3.12.
Over the years, I was installing every hardware enablement stack for
precise and every kernel I installed had similar problems.
Please reopen this bug report. I guess many people will not find it
because the don't have powertop installed. I mean the "heat" of this bug
would be much higher if people would find this bug report.
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https://bugs.launchpad.net/bugs/1213719
Title:
[Samsung NP900X3D-A03IT] Powertop shows 100% Device Usage for audio
codecs
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