[Bug 83262] New: Radeon DPM re-clocking fails after resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83262

          Priority: medium
            Bug ID: 83262
          Assignee: xorg-driver-ati at lists.x.org
           Summary: Radeon DPM re-clocking fails after resume from suspend
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: wittyman37 at yahoo.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/Radeon
           Product: xorg

I noticed that when I suspend my machine, resume, and then play openGL games
like Dota 2 or L4D2 that the performance is not as good as a fresh boot. The
framerates are reduced and the overall experience is less smooth. I am using
the open source radeon graphics drivers with a Saphire R7 260X and Arch Linux
64-bit with Cinnamon desktop. I had a similar issue with my HD6670 graphics
card. 

It seems like dpm (dynamic power management) is not enabled after resuming from
suspend. When running `cat /sys/kernel/debug/dri/64/radeon_pm_info` my system
should move from mclk: 15000 to mclk:150000 when running Dota 2 or L4D2, but
this does not happen after I have resumed from suspend unless I reboot.

I have had this issue since at least the 3.14 kernel and still have this issue
with the the latest stable 3.16.1 kernel, xf86-video-ati 1:7.4.0-3 and mesa
10.2.6-1.

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