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Wihajster
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Joined: 05 Jul 2014
Posts: 8
Location: United Kingdom

PostPosted: Sun Jul 06, 2014 5:50 pm    Post subject: No Laptop Fan Speed Control: pwmconfig ineffective Reply with quote

Before preparing my laptop (Samsung NV355) for emerging xfce4, I updated my USE flags to include "-gnome -kde -qt3 -qt4" and performed a complete system update (followed by depclean and revdep-rebuild); in the large amount of compilation that followed twice my laptop overheated and shut down.

As a stopgap, I stepped down the number of cores used to compile by changing MAKEOPTS="-j4" to -j2, but even so my laptop runs quite hot, sitting around 58-60 Celsius. I emerged acpi and lm_sensors; the first lets me monitor temperatures fine, but does not seem to recognise the fans, and the latter picks up no devices at all.

I tried running pwmconfig as was suggested successfully for others that I found with this problem, but was met only with an error. Attached are my kernel config and makefile along with the outputs of 'acpi -V' (ran almost immediately after login), 'pwmconfig' and 'lspci' as root.

Kernel config.
make.conf
acpi -V
pwmconfig
lspci
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haarp
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Joined: 31 Oct 2007
Posts: 517

PostPosted: Tue Jul 08, 2014 2:46 pm    Post subject: Reply with quote

60°C is nothing to worry about. 80-85 is when it gets worrisome, but some craptops are so bad they regularly run even hotter.
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The Doctor
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Joined: 27 Jul 2010
Posts: 2574

PostPosted: Tue Jul 08, 2014 7:04 pm    Post subject: Reply with quote

May I suggest that you invest in a laptop cooler? Gentoo is extremely demanding on hardware and a laptop cooler will help keep temperatures under control while compiling. It is probably the case that your fans are working and are simply inadequate for the job.
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First things first, but not necessarily in that order.

Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box.
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Wihajster
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Joined: 05 Jul 2014
Posts: 8
Location: United Kingdom

PostPosted: Wed Jul 09, 2014 4:04 pm    Post subject: Reply with quote

Yeah, further investigation found the fans quite happily spinning away, just not doing much good when the CPU or graphics are under heavy load. A laptop cooler would definitely be a good idea: thanks.
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