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dglt

Member

Registered: 2019-08-14

Posts: 82

RTX 2060 mobile only drawing 80w max, should be 115w

hi, i've been trying to figure out why my RTX2060 mobile refresh gpu is only drawing 80w when it should be drawing 115w under load as it does on windows when im stuck using it. i've tried 3-4 different kernels, a few different driver versions but result is always the same. i can overclock, set performance profile, i even managed to get g-sync working on a non g-sync panel if anyone's interested but why the gpu wont make use of its potential i cant seem to figure out.

thanks in advance for any ideas on how to fix this.

Lone_Wolf

Forum Moderator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,922

Re: RTX 2060 mobile only drawing 80w max, should be 115w

The tool that provides the numbers may be faulty or just calculate things differently then windows.

Use benchmarks available for windows and linux to compare performance like unigine-superposition or unigine-valley (both are in AUR) .

See https://benchmark.unigine.com/ to get the windows versions.

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

dglt

Member

Registered: 2019-08-14

Posts: 82

Re: RTX 2060 mobile only drawing 80w max, should be 115w

The tool that provides the numbers may be faulty or just calculate things differently then windows.

Use benchmarks available for windows and linux to compare performance like unigine-superposition or unigine-valley (both are in AUR) .

See https://benchmark.unigine.com/ to get the windows versions.

i ran a few benchmarks before making this thread, geekbench vulkan/opencl/cuda, and unigine heaven but all much lower compared to windows @115w so i think the power measurement is accurate but i cant understand why it would limit at 80w on linux but 115w windows.

Lone_Wolf

Forum Moderator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,922

Re: RTX 2060 mobile only drawing 80w max, should be 115w

unigine heaven is rather old (and is not pure 64-bit) , but when all perfrorm worse that doesn't matter.

Power saving tools like laptop mode tools, TLP , KDE powerdevil , gnome powermanager etc can have bad effects on performance.

Are you using any of those ?

I assume you are using the proprietary nvidia driver ?
http://us.download.nvidia.com/XFree86/L … index.html is the readme for the latest version with a lot of information.

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

dglt

Member

Registered: 2019-08-14

Posts: 82

Re: RTX 2060 mobile only drawing 80w max, should be 115w

unigine heaven is rather old (and is not pure 64-bit) , but when all perfrorm worse that doesn't matter.

Power saving tools like laptop mode tools, TLP , KDE powerdevil , gnome powermanager etc can have bad effects on performance.

Are you using any of those ?

tlp i uninstalled a while back, nothing else of its kind are installed other than intel-undervolt. im plugged in 99% of the time so power savings couldnt possibly be any less of a priority to me.

I assume you are using the proprietary nvidia driver ?
http://us.download.nvidia.com/XFree86/L … index.html is the readme for the latest version with a lot of information.

yes, i've tried the current available version as well as the dkms package on linux, linux-zen, and the covaluna kernel from aur. i've also tried the vulkan beta drivers from nvidia as well as the last few available versions with each of those kernels but the result remains the same. the laptop is a i7-10750H/RTX2060 mobile refresh lenovo legion 5i, there are 3 variants of vbios for these models (85w, 100w, 115w) and i've tried all three but on linux it just maxes out at 80-81w even when throwing multiple synthetic stress tests at it.

http://us.download.nvidia.com/XFree86/L … index.html is the readme for the latest version with a lot of information.

i'll have another look at the possible power management options built in but so far i've tried enabling/disabling dynamic pm used on the turing cards, im running in discrete mode to avoid any of the usual optimus quirks.  it's a strange one, thanks for the replies because im truly running out of ideas on this one.

EDIT: unfortunately, i've tried everything i could find in the nvidia documentation related to power without success.

Last edited by dglt (2020-11-25 13:36:49)