Wakeup from sleep and hibernation with continuous fan noise

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juppes
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Joined: Wed Dec 05, 2012 8:42 am

Wakeup from sleep and hibernation with continuous fan noise

Post by juppes »

After an upgrade to Mint 17.3 with Cinnamon I have a strange problem on my HP 6910p: whenever I put the computer to sleep (be it just sleep or hibernation), and when I wake it up, the fan in the machine starts spinning at full speed, and it stays like that all the time.

In normal use, after a normal boot, the fan is rather quiet. The phenomenon described above can be stopped by a reboot.

This, though, is nothing you want to do in daily life just to stop the fan noise. Does anyone here have an idea what could be the reason for this behaviour? In the BIOS I cannot find any option about the processor or the fan to fiddle around with, so I assume it must be some hardware recognition problem.

Thank you for any suggestion to cure the "sickness"
tolkien
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Joined: Sat Nov 14, 2015 9:50 am

Re: Wakeup from sleep and hibernation with continuous fan no

Post by tolkien »

Sounds like an acpi problem.
When you say "upgrade" do you mean you made a fresh install or upgraded on top of the old version? Because it may have to do with the new kernel, so maybe switching kernels could work.
You can also try different kernel boot parameters as suggested here:
https://wiki.archlinux.org/index.php/DSDT
In addition, it may be possible to turn off the fan manually when waking up the computer.
What is the output of: sudo find /sys -name "*pwm*"
juppes
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Joined: Wed Dec 05, 2012 8:42 am

Re: Wakeup from sleep and hibernation with continuous fan no

Post by juppes »

Hello,

Thank you for your answer. The console output is:

Code: Select all

/sys/class/pwm
/sys/kernel/debug/pwm
I can tell you, however, that in the meantime I have solved the issue by means of the script I found on this webpage:

http://superuser.com/questions/229849/h ... -on-ubuntu

Your assumption that this was an ACPI problem is definitely confirmed :!:

Thank you again and have a Merry Christmas and a Happy New Year

Greetings from Germany
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