Bug 111584

Summary:	"pp_od_clk_voltage" unavailable on Hawaii GPU (R9 390)
Product:	DRI	Reporter:	Jonas del Campo <jonasdcdm>
Component:	DRM/AMDgpu	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED MOVED	QA Contact:
Severity:	enhancement
Priority:	not set
Version:	XOrg git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Jonas del Campo 2019-09-07 15:43:15 UTC

I have recently tried to overclock/undervolt my GPU (R9 390) within Linux thanks to the "amdgpu.ppfeaturemask=0xffffffff" boot parameter, but unfortunately the file "pp_od_clk_voltage" is not available after a reboot.

Files "pp_dpm_mclk" and "pp_dpm_sclk" however show correct states and MHz, except that they don't show voltage information. Changing "power_dpm_force_performance_level" to manual allows me to make changes to these files, I can force a state to be used and overclock it, but voltages aren't showed and can't be modified.

I have read that Southern Island GPUs were not expected to get this feature working, and I know Vega is compatible, but I can't find anywhere if Hawaii (CIK) hardware should be able to expose this feature. I might be missing something.

Is there any way to undervolt my GPU under Linux at the moment?

Specs:
OS: Arch Linux
Kernel: 5.2.11.arch1-1
Mesa: 19.1.6-1
Xorg: 1.20.5-2
Boot parameters: radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dpm=1 amdgpu.dc=1 amdgpu.ppfeaturemask=0xffffffff
GPU: [AMD/ATI] Hawaii PRO [Radeon R9 290/390] (rev 80)

Feel free to ask for more details and output if needed.

Thank you for your time.

Comment 1 Martin Peres 2019-11-19 09:51:04 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/901.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.