[Bug 101491] Can't wake up the dedicated graphics card unless power management is disabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101491

            Bug ID: 101491
           Summary: Can't wake up the dedicated graphics card unless power
                    management is disabled
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: drkdfndr at rocketmail.com

Created attachment 132031
  --> https://bugs.freedesktop.org/attachment.cgi?id=132031&action=edit
dmesg output

I have a ASUS K53TK with a AMD A6-3420M. It has an integrated graphics card the
AMD HD 6520G, and a dedicated one HD 7670M.
I am only able to use the dedicated card if I set the parameter
"radeon.runpm=0".
Otherwise xrandr only sees one provider, and DRI_PRIME=1 can't render any
program.

At boot time, if I don't disable the power management I get several error like
[  458.460874] [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed
(scratch(0x8504)=0xFFFFFFFF).

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