| Bug ID | 106428 |
|---|---|
| Summary | reported VDDGFX GPU voltage jumps above set limits in pp_od_clk_voltage when UVD is used for VAAPI/VDPAU |
| Product | DRI |
| Version | unspecified |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | tempel.julian@gmail.com |
I adjusted my pstates in "/sys/class/drm/card0/device/pp_od_clk_voltage" that the GPU voltage should never be above 900 mV: (...) 5: 1126Mhz 880 mV 6: 1180Mhz 890 mV 7: 1209Mhz 900 mV And in normal 3D applications "watch -n 0.5 cat /sys/kernel/debug/dri/0/amdgpu_pm_info" accordingly never reports more than 900 mV for VDDGFX. But when I play a video in mpv with VAAPI/VDPAU, reported VDDGFX often jumps to 1100 mV, which clearly is undesired behavior. It sticks again to normal 900 mV as soon as I disable hardware decoding. Now the question is, if the reported voltage is correct (then adjusting pp_od_clk_voltage has a bug) or if the real voltage is just reported wrong (than information in amdgpu_pm_info would be wrong). Happens with both 4.17rc2 and drm-next-4.18-wip. GPU is RX 560.
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