** Changed in: linux
Status: Unknown => New
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https://bugs.launchpad.net/bugs/1861633
Title:
Rx vega m gl undervolt and overclock pp_od_clk_voltage values cannot
be changed using echo
Status in Linux:
New
Status in linux package in Ubuntu:
New
Status in xserver-xorg-video-amdgpu package in Ubuntu:
New
Bug description:
GPU=Rx vega m gl
Release=Focal, 20.04 (development)
xserver-xorg-video-amdgpu version=19.1.0-1 (active development)
/sys/class/drm/card1/device/pp_od_clk_voltage cannot be change beyond
the parameters stated at the bottom of this file within the title
OD_RANGE, as follows:
OD_RANGE:
SCLK: 225MHz 1011MHz
MCLK: 300MHz 700MHz
VDDC: 750mV 750mV
The parameters in OD_RANGE are too constrictive and do not allow
practicable overclocking/undervolting. Please could these values be
changed to the following?:
OD_RANGE:
SCLK: 225MHz 1500MHz
MCLK: 300MHz 850MHz
VDDC: 300mV 1500mV
This bug was also found here;
https://gitlab.freedesktop.org/drm/amd/issues/574
The voltages and clock speeds cannot be amended above 1011Mhz, the
HBM2 cannot exceed 700MHz and all voltages can only equal 750mV.
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