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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 79806] New: Performance degradation after resume
Date: Sun, 08 Jun 2014 20:02:26 +0000	[thread overview]
Message-ID: <bug-79806-502@http.bugs.freedesktop.org/> (raw)


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https://bugs.freedesktop.org/show_bug.cgi?id=79806

          Priority: medium
            Bug ID: 79806
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Performance degradation after resume
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: enyecz@gmail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Radeon
           Product: DRI

I have a Radeon HD 4350/4550 (RV770) card in my notebook. After resuming from
suspend, there is a significant 3D performance drop (a bit less than 1/4 of
original performance remains). The performance drop is exactly at the same
level as it is after "echo low >
/sys/class/drm/card0/device/power_dpm_force_performance_level", albeit
power_dpm_force_performance_level still contains "auto".

Bug is found in Ubuntu 14.04, but it was there at least since 13.10 (I have
just found the workaround). The bug is there with kernel 3.13 (official), with
3.14 mainline and 3.15-RC8 which was build for Ubuntu 14.10.

Workaround: when resume, execute "echo auto >
/sys/class/drm/card0/device/power_dpm_force_performance_level".

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             reply	other threads:[~2014-06-08 20:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-08 20:02 bugzilla-daemon [this message]
2014-06-08 20:03 ` [Bug 79806] Performance degradation after resume bugzilla-daemon
2014-06-09  5:45 ` bugzilla-daemon
2014-06-26 18:00 ` bugzilla-daemon
2014-06-26 18:11 ` bugzilla-daemon
2014-07-04 17:23 ` bugzilla-daemon
2014-07-04 17:28 ` bugzilla-daemon
2014-07-15 16:16 ` bugzilla-daemon
2014-07-15 16:17 ` bugzilla-daemon
2014-07-15 16:31 ` bugzilla-daemon
2019-11-19  8:50 ` bugzilla-daemon

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