From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 79806] New: Performance degradation after resume Date: Sun, 08 Jun 2014 20:02:26 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1366364297==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 7C44389078 for ; Sun, 8 Jun 2014 13:02:26 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1366364297== Content-Type: multipart/alternative; boundary="1402257746.BFaD0.15219"; charset="us-ascii" --1402257746.BFaD0.15219 Date: Sun, 8 Jun 2014 20:02:26 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" 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". -- You are receiving this mail because: You are the assignee for the bug. --1402257746.BFaD0.15219 Date: Sun, 8 Jun 2014 20:02:26 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"
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".

You are receiving this mail because:
  • You are the assignee for the bug.
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