ubuntu-x-swat team mailing list archive

[Øyvind Stegard <oyvinst@xxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-ati

HTML5 videos embedded in web pages in a certain way are unusably slow
with Radeon KMS and cause xorg process to use 100% CPU.

Examples of web pages with videos that cripple Xorg:
http://www.dailymotion.com/openvideodemo
http://hacks.mozilla.org/2010/04/account-manager-coming-to-firefox/
http://videos.videoonwikipedia.org/

There is no crash, and situation is recoverable if web page with video
is closed and/or video stopped and not in view.

There is an upstream bug report here:
https://bugs.freedesktop.org/show_bug.cgi?id=27139

There seems to be a problem with how Firefox uses Xrender and how this
is implemented in the Xorg driver, which causes usage of software
fallbacks.

I would guess this bug causes many web pages with HTML5 video to become
unusable in Ubuntu Lucid+Firefox for users of ATI graphics cards with
radeon-KMS driver. I found no Ubuntu bug report tracking this problem,
so I'm reporting it now.

I've got an ATI X1400 (r500) card, but this also affects r600 (from
upstream report).

Ubuntu Lucid x86
xserver-xorg-video-ati 1:6.13.0-1ubuntu5
firefox 3.6.3+nobinonly-0ubuntu4

** Affects: xserver-xorg-driver-ati
     Importance: Unknown
         Status: Unknown

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New

** Bug watch added: freedesktop.org Bugzilla #27139
   http://bugs.freedesktop.org/show_bug.cgi?id=27139

** Also affects: xserver-xorg-driver-ati via
   http://bugs.freedesktop.org/show_bug.cgi?id=27139
   Importance: Unknown
       Status: Unknown

-- 
Xorg 100% CPU usage with HTML5 video in Firefox [Radeon KMS]
https://bugs.launchpad.net/bugs/587636
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which is the registrant for xserver-xorg-driver-ati.