Bug 28992 - 2d is extremely slow with kwin-compositing (bisected)
Summary: 2d is extremely slow with kwin-compositing (bisected)
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: xf86-video-ati maintainers
QA Contact: Xorg Project Team
Depends on:
Reported: 2010-07-09 12:38 UTC by Henning Fleddermann
Modified: 2015-04-25 11:23 UTC (History)
3 users (show)

See Also:
i915 platform:
i915 features:


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Description Henning Fleddermann 2010-07-09 12:38:49 UTC
After updating to 6.13.1, things like opening a right-click menu or a file-dialog (which fade in) became extremely slow. I bisected this to commit 30591320ec46e491ba20904cc64f3405b51c6505.
Author: Jerome Glisse <jglisse@redhat.com>
Date:   Fri May 7 17:35:09 2010 +0200

    kms: add support for the MSC swap & sync API
    This patch is mostly a port over of Intel ddx code for
    MSC support. It needs a radeon KMS module with version
    2.4 which has the query for hw crtc id.
    Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
    Signed-off-by: Jerome Glisse <jglisse@redhat.com>

:040000 040000 8f59eb7c18b2137eb88e3305db5a776fab25bdad ed1fb660478c944ebf849c5b0b4686f4bafd5e06 M      src

So apparently this is related to the swap&sync stuff. My card is a Radeon X1900 XT. Versions of other relevant software on my system: KDE 4.5 rc1, kernel 2.6.35-rc2, Xorg-Server
Comment 1 Michel Dänzer 2015-04-23 01:55:57 UTC
Is this still an issue with current software versions?
Comment 2 Oldrich Jedlicka 2015-04-25 11:23:24 UTC
I am only on CC, but I think that this is not an issue any more at least for me.

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