[Bug 64950] New: Powersaving don't work on second card

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri May 24 03:27:50 PDT 2013


          Priority: medium
            Bug ID: 64950
          Assignee: xorg-driver-ati at lists.x.org
           Summary: Powersaving don't work on second card
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lexa at cfotr.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/Radeon
           Product: xorg

Created attachment 79751
  --> https://bugs.freedesktop.org/attachment.cgi?id=79751&action=edit
dmesg from machine with two cards.

I have a laptop with two ati cards:
Mobility Radeon HD 6620G 
Radeon HD 6400M

Enabled powersave mode on both cards:

#echo dynpm > /sys/class/drm/card0/device/power_method
#echo dynpm > /sys/class/drm/card1/device/power_method

Clock speed on the first card reduced almost immediatly:

#cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 200000 kHz
current engine clock: 7990 kHz
default memory clock: 667000 kHz

But second card don't react at all:

#cat  /sys/kernel/debug/dri/1/radeon_pm_info
default engine clock: 800000 kHz
current engine clock: 799940 kHz
default memory clock: 800000 kHz
current memory clock: 799870 kHz
voltage: 900 mV

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