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i'm running arch linux and trying to enable amdgpu support for my gpu r9 270x pitcairn architecture. i'm trying to enable core clock control through pp_od_clk_voltage. someone pointed out to me that apparently amdgpu driver does not create the file in the system if this condition is not met in amdgpu_pm.c

if ((is_support_sw_smu(adev) && adev->smu.od_enabled) ||
        (!is_support_sw_smu(adev) && hwmgr->od_enabled)) {
        ret = device_create_file(adev->dev,
                &dev_attr_pp_od_clk_voltage);
        if (ret) {
            DRM_ERROR("failed to create device file "
                    "pp_od_clk_voltage\n");
            return ret;
        }
    }

is it possible for me to fix this as i'm trying to find a way to control gpu core clock.

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  • 1
    Why would you want to "correct it"? That if statement checks for the availability of the feature. If it's not supported by your GPU, enabling it is probably a very bad idea.
    – Marco Bonelli
    Aug 26, 2019 at 6:35
  • 1
    Also, have you tried adding amdgpu.ppfeaturemask=0xffffffff to your kernel boot parameters? That would enable all features, including this one if supported.
    – Marco Bonelli
    Aug 26, 2019 at 6:37
  • Relevant: bugs.freedesktop.org/show_bug.cgi?id=106188
    – Marco Bonelli
    Aug 26, 2019 at 6:45
  • yes i already enabled it in grub config. this is not a linux problem but a hardware failure on my side. the pc crash randomly and it runs perfectly fine if i underclock the gpu core clock slightly lower. its not an overheating problem either. i've installed tlp but it didn't help. so i'm looking for a feature to adjust gpu core clock like in windows with catalyst proprietary driver and ran into a dead end.
    – mangorilla
    Aug 26, 2019 at 6:51
  • i dont think its a bug as the file pp_od_clk_voltage is missing from the system leading me to think the feature is not supported or disabled by default.
    – mangorilla
    Aug 26, 2019 at 6:57

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