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[axel <748137@xxxxxxxxxxxxxxxxxx>]

Yes,
      does not surprise me, basically I suspect it comes down to the fact that your ATI chip set is not functional enough with the Xorg radeon driver to run Unity .....Also like my R690M you will not be supported by the ATI fglrx driver (anything older than R600 is not supported in current releases). My R690M should work but has a driver bug and now defaults back to classic Gnome. Previously it ran Unity but became unusable because of the bug and the screen corruption it caused. I suspect a ppa daily release of Unity \ Compiz triggered this change in behavior so I can not even get the screen corruption.

I have not found any work around / manual config of xorg.conf to get unity working. If I do I will post and let you know.
In the past I used a kernel parameter radeon.modeset=0 in my grub.conf and managed to get compiz cube working with the radeon driver and a manual xorg.conf. You could try that.

I have yet to see anything that Unity does that does seems radically any more demanding than running Compiz Cube!
Its worth persevering as Unity has some really great features. I am even managing to run it as my desktop default on a 24In Monitor! :-)

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/748137

Title:
  unity rendering broken with fglrx (black masks)