Originally posted by cip91
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Samsung Introduces "LAB" Linux Frequency Governor
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Originally posted by cip91 View PostFor people with an AMD gpu: the oss drivers keep the gpu in the "mid" or even "high" profile, even if it's not doing anything. That's because a (really) small number of gpus tend to output errors/artifacts on the "low" profile. However, this increases temperature. If you want to enable dynamic power profile or force a particular profile (you may want to, expecially on laptops), follow this steps from archwiki.
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Originally posted by Ibidem View PostMyself, I use "low" profile, conservative governor (believe it or not, it actually does make a difference in temperature), and phc (with a patch for 3.8...)
Besides that, I've got thinkpad_acpi configured to allow fan control--I use "level auto" by default, but thinkfan or a script to switch to level 7 for high loads.
I rather wish there were a daemon that combines the features of acpid, thinkfan, and cpufreqd, so you can base settings on cpu frequency, programs running, acpi events, _and_ temperatures.
Oh, and by the way...LAB is more-or-less like Turbo Boost, except for its relation to the nominal frequency and capabilities of the processor.
Powersave keeps it at lets say 800mhz under any load
Ondemand lets it sit at 800mhz, but kicks it up to MAX (for me 1.6ghz) immediately under any load to get it done as fast as possible.
Conservative sits at 800mhz, and when a load hits gradually kicks the frequency up by one step (I think a step on intel is like...50mhz? I could be totally wrong on that though) until the load is done, then it drops it back to 800mhz.
Conservative helps temperature because you're only ever gonna hit max frequencies if its a sustained load in which case you probably WANT maximum frequency, otherwise you're sitting around middle frequency. Lower frequency = lower temperature.
And yeah LAB is like turbo boost.
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Myself, I use "low" profile, conservative governor (believe it or not, it actually does make a difference in temperature), and phc (with a patch for 3.8...)
Besides that, I've got thinkpad_acpi configured to allow fan control--I use "level auto" by default, but thinkfan or a script to switch to level 7 for high loads.
I rather wish there were a daemon that combines the features of acpid, thinkfan, and cpufreqd, so you can base settings on cpu frequency, programs running, acpi events, _and_ temperatures.
Oh, and by the way...LAB is more-or-less like Turbo Boost, except for its relation to the nominal frequency and capabilities of the processor.
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Originally posted by Nuc!eoN View PostThank you, I'll look through it!
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Originally posted by cip91 View PostFor people with an AMD gpu: the oss drivers keep the gpu in the "mid" or even "high" profile, even if it's not doing anything. That's because a (really) small number of gpus tend to output errors/artifacts on the "low" profile. However, this increases temperature. If you want to enable dynamic power profile or force a particular profile (you may want to, expecially on laptops), follow this steps from archwiki.
Leave a comment:
-
For people with an AMD gpu: the oss drivers keep the gpu in the "mid" or even "high" profile, even if it's not doing anything. That's because a (really) small number of gpus tend to output errors/artifacts on the "low" profile. However, this increases temperature. If you want to enable dynamic power profile or force a particular profile (you may want to, expecially on laptops), follow this steps from archwiki.
Leave a comment:
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Originally posted by Ericg View PostWe're aware that it uses more frign, but for some bizarre reason linux seems to be worse at thermal management than windows (I dont know how thats possible... im just speaking from experience.)
For example. This very laptop (Dell XPS 13z) running Arch linux, if I place it on my lap in such a way that my leg blocks the vent the laptop will gradually rise in temperature until it hits 95C and then BIOS kills the power to the entire laptop to prevent damage.
The same laptop running Windows 7 doing the same thing, also with my leg blocking the vent, will hit 85C and stay there, never shutting down.
^While anecdotal evidence, this isnt a "This happened once, so im telling the story." I had Arch Linux on this laptop for about 8 months or so and would accidentally overheat it at least once a week. I've had Win7 on this thing for about a month now and havent accidentally overheated it even once.
If I ever put arch linux back on this laptop I very well may stick to the powersave governor just to make sure I dont accidentally damage the internals from thermal output
my post:
same for my Laptop. The temps on archlinux are significantly higher than on Windows. For me thats around 10C difference, too.
I didnt compare it to ubuntu, but I shall do that. Also I will compare the temps of my desktop PC soon (Arch vs Ubuntu vs Windows 7).
I started a similar thread in the German forums some 2 months ago: https://bbs.archlinux.de/viewtopic.php?id=22089
Arch in general seems to be very affected as there is a vast numberof complains about cpu overheating in the forums
e.g. https://bbs.archlinux.org/viewtopic.php?id=143580
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Originally posted by frign View PostLaptops are an unique case when it comes to Linux: I for example have a small Apple Desktop computer and actually had to write my own fan-control software, because the Kernel was just doing such a bad job with it.
I would recommend everybody to do the same to keep the temperature low enough. But still, my computer idles at 42?C, which is a lot for my purposes.
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Sadly a common problem
Originally posted by Ericg View PostWe're aware that it uses more frign, but for some bizarre reason linux seems to be worse at thermal management than windows (I dont know how thats possible... im just speaking from experience.)
For example. This very laptop (Dell XPS 13z) running Arch linux, if I place it on my lap in such a way that my leg blocks the vent the laptop will gradually rise in temperature until it hits 95C and then BIOS kills the power to the entire laptop to prevent damage.
The same laptop running Windows 7 doing the same thing, also with my leg blocking the vent, will hit 85C and stay there, never shutting down.
^While anecdotal evidence, this isnt a "This happened once, so im telling the story." I had Arch Linux on this laptop for about 8 months or so and would accidentally overheat it at least once a week. I've had Win7 on this thing for about a month now and havent accidentally overheated it even once.
If I ever put arch linux back on this laptop I very well may stick to the powersave governor just to make sure I dont accidentally damage the internals from thermal output
Laptops are an unique case when it comes to Linux: I for example have a small Apple Desktop computer and actually had to write my own fan-control software, because the Kernel was just doing such a bad job with it.
I would recommend everybody to do the same to keep the temperature low enough. But still, my computer idles at 42?C, which is a lot for my purposes.
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