[Bug 108704] 4.19 amdgpu Tonga powerplay regressions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108704

            Bug ID: 108704
           Summary: 4.19 amdgpu Tonga powerplay regressions
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: daniel at constexpr.org

Created attachment 142423
  --> https://bugs.freedesktop.org/attachment.cgi?id=142423&action=edit
dmesg output

With Gentoo's 4.19.0 and 4.19.1 kernels, powerplay does not seem to be working
on my Radeon R9 380X card: 3D applications run noticeably slower than before
(but otherwise work fine) and there a number of errors in dmesg during startup
and when trying to switch dpm states via sysfs.

Everything works fine with 4.18.17-gentoo.

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