https://bugzilla.kernel.org/show_bug.cgi?id=205977

Bug ID: 205977 Summary: [amdgpu] Vega10 dpm defaults cause card to overvolt and overboost Product: Drivers Version: 2.5 Kernel Version: 5.4.6-gentoo Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: stefanspr94@gmail.com Regression: No

On a Vega 64 with completely stock settings, boost clocks of 1800mhz+ can be observed when running Minecraft with shader mod or Outward (DXVK) or any OpenCL workload, sometimes leading to driver crashes. When no changes to overdrive settings are made, AVFS will also overvolt the card accordingly (I've seen up to 1.35V Vcore). This can potentially damage the hardware.

When disabling AVFS through enabling ppfeaturemask=fffd7fff and using a custom pp_table, the max voltage of 1.2V is respected, but the core clocks are still exceeded like before.

But there is a workaround: pp_table + echoing "profile_peak" or "high" to "power_dpm_force_performance_level", leads to max clocks AND voltages being respected. Even when setting it to "auto" afterwards. Maybe this points to where to look for the bug.

This is also an issue under Windows, so hopefully resolving this bug on Linux will also lead to a fix on that platform (I figure, there is some code sharing, considering I get the same behavior on both). This behaviour is present since the launch of Vega.