[clug] Head up for those thinking of Ubunty Jaunty with older ATI cards -a follow up

Ian Bardsley ifb777 at tpg.com.au
Tue Apr 28 12:57:09 GMT 2009

Just a quick follow up on this

Have this evening upgraded my notebook to Ubuntu Jaunty and was unable 
to activate compositing.

> https://bugs.launchpad.net/ubuntu/jaunty/+source/xserver-xorg-video-intel/+bug/36382 explains

The solution for me was to add SKIP_CHECKS=yes to 

Acer Aspire 5720

Hope this helps someone


Ian Bardsley


Thanks Andrew

A similar problem also appears to exist with some Intel chipsets too.  I
tried the release candidate on my Acer note book with similar results.
Haven't had an opportunity to try the final release yet but will comment
agin when I have if the problem still exists.

Have a good day all

Ian Bardsley

Andrew Janke wrote:
> Hi all,
> If you plan on going to Ubuntu Jaunty and have an older ATI card that
> uses the Radeon driver be sure to take a read of these:
>    https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/363238
>    https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/365886
> Otherwise you might just be left with the (somewhat wrong) impression
> that Jaunty is slow and jerky..
> Seems that the default acceleration method changed from XAA to EXA in
> the radeon driver for the Jaunty release and not all cards like it
> that much. It is manifested as slow redraw/window moving/firefox
> scrolling/etc In my case the times reported by gtkperf halved when
> switching back to XAA.
> My machine: T42 Thinkpad with a ATI Technologies Inc RV350 [Mobility
> Radeon 9600 M10]
> --
> Andrew Janke
> (a.janke at gmail.com || http://a.janke.googlepages.com/)
> Canberra->Australia    +61 (402) 700 883

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