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Hi,
Strangely enough, with lernels >=5.3 or something, my laptop runs a bit hotter. Not much, yet enough to trigger the fan much more often.
I already discussed it there https://bbs.archlinux.org/viewtopic.php?id=251433 and on another topic. Anyway.
It's being annoying, new new 'linux-lts' kernel is now 5.4.31 but until recently I managed to cope with 4.19 and everything was fine.
So, I decided to try the i8kutils solution : replace BIOS managed fan control by a custom one. Why not.
It's all detailed here :
https://wiki.archlinux.org/index.php/Fan_speed_control
Works fine enough, can easily be tweaked since it's a tclsh script.
BUT, my issue is that the speed of fans cannot be set corercty.
With BIOS control, there is a "medium" level, at 3600 RPM (noisy already), and a full speed level at 4900 RPM (nightmare, but required when cpu on heavy compuation load)
With i8k, when trying the "probe" thing, it does find some speeds.
( for instance : status(rightspeed) = 0 2084 3255 4302 )
But for real :
- speed 1 --> slow and almost no noise, sensors report it at 2500 rpm but I can't trust it, sounds more like 1000 rpm to me, almost inaudible (and promising !)
- speed 2, 3 whatever : always at max 4900 rpm
Absolutely no way to set the speed that bios usually uses.
I know this is 'old stuff'.
Laptop is 3 year old, i8kutils looks more like an abandonware than anything ... but if anyone steps by, thank you for any advice as how to *control* fan speed for real
Thanks for reading !
Last edited by squalou (2020-04-12 17:03:21)
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Damn, I think I'll close this.
From this issue :
https://github.com/vitorafsr/i8kutils/issues/5
I conclude that it's not really possible unless getting information from Dell about their BIOS. Too bad.
Last edited by squalou (2020-04-12 17:03:35)
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