[Bug 112071] 5700 XT: ppfeaturemask doesn't work with iGPU multi-monitor

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Oct 20 10:46:00 UTC 2019


            Bug ID: 112071
           Summary: 5700 XT: ppfeaturemask doesn't work with iGPU
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: zamundaaalp at gmail.com

If the BIOS option "iGPU multi-monitor" is enabled (so I can use the internal
GPU ports, namely DVI) amdgpu.ppfeaturemask doesn't do anything anymore.
"cat /sys/module/amdgpu/parameters/ppfeaturemask" gives the mask I set (either
fffd7fff or simply 0xffffffff) but the files like
/sys/class/drm/card0/device/pp_od_clk_voltage don't actually get created. They
do if I disable iGPU multi-monitor.

Wether I'm on kernel 5.3.6 or 5.4rc2 doesn't matter, wether I'm on Mesa 19.2 or
19.3 (git) doesn't matter as well.

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