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mangorilla

Member

Registered: 2019-08-24

Posts: 3

need help trying to enable amdgpu driver for old gpu

i have an old graphic card saphire r9 270x (pitcairn architecture) that constantly crash when in maximum load. the stock clock is 1070mhz but when underclock to 1000mhz the crash stop. i already installed TLP but the crash did not stop. i have a dual boot machine (together with windows) and the gpu is underclock with catalyst driver in windows system. in the wiki it says amdgpu allow to control gpu clock through p-state. and so i enable amd gpu experimental. in grub config

GRUB_CMDLINE_LINUX_DEFAULT="radeon.cik_support=0 amdgpu.cik_support=1 radeon.si_support=0 amdgpu.si_support=1 amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1

lspci -nnk | grep -i vga -A3 | grep 'in use'

Kernel driver in use: amdgpu

but the file pp_od_clk_voltage is missing in /sys/class/drm/card0/device. I can only find pp_sclk_od, pp_mclk_od, pp_dpm_sclk and pp_dpm_mclk. so i create pp_od_clk_voltage myself.

OD_SCLK:
0:        300MHz        900mV
1:        400MHz        942mV
2:        500MHz        984mV
3:        600MHz       1026mV
4:        700MHz       1068mV
5:        800MHz       1110mV
6:        900MHz       1152mV
7:       1000MHz       1200mV
OD_MCLK:
0:        300MHz        900mV
1:       1000MHz       1050mV
2:       1400MHz       1200mV
OD_RANGE:
SCLK:     300MHz       1000MHz
MCLK:     300MHz       1400MHz
VDDC:     900mV        1200mV

i'm trying to move this file to /sys/class/drm/card0/device/ but i get an error

mv pp_od_clk_voltage /sys/class/drm/card0/device

mv: cannot create regular file '/sys/class/drm/card0/device': Permission denied

i also try the same thing with touch command and going to the directory and using nano create the file and ended up with the same error. this is all done with su command to log in to the root account before entering the command in the terminal. i also already check the file permission to sys folder

ls -l

drwxr-xr-x  13 root root     0 Aug 23 23:01 sys

i've run out of options and am not sure if my gpu is supported. can someone help me?

loqs

Member

Registered: 2014-03-06

Posts: 18,349

Re: need help trying to enable amdgpu driver for old gpu

https://github.com/torvalds/linux/blob/ … _pm.c#L557

mangorilla

Member

Registered: 2019-08-24

Posts: 3

Re: need help trying to enable amdgpu driver for old gpu

i think you missunderstood, i cannot edit anything in the p-state.

echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level

cat /sys/class/drm/card0/device/power_dpm_force_performance_level
manual

echo "s 0 300 900" > /sys/class/drm/card0/device/pp_od_clk_voltage
bash: /sys/class/drm/card0/device/pp_od_clk_voltage: Permission denied

cat /sys/class/drm/card0/device/pp_od_clk_voltage
/sys/class/drm/card0/device/pp_od_clk_voltage: No such file or directory

touch /sys/class/drm/card0/device/pp_od_clk_voltage
touch: cannot touch '/sys/class/drm/card0/device/pp_od_clk_voltage': Permission denied

i already use amdgpu.ppfeaturemask=0xffffffff in boot parameter and log in to root account using su command before entering those command.

loqs

Member

Registered: 2014-03-06

Posts: 18,349

Re: need help trying to enable amdgpu driver for old gpu

https://github.com/torvalds/linux/blob/ … pm.c#L2613 is where the sysfs file is created if the conditions are met.

mangorilla

Member

Registered: 2019-08-24

Posts: 3

Re: need help trying to enable amdgpu driver for old gpu

is there any other option i can try to set the preset gpu clock?