Comment 25 for bug 748137

Right .... I have upgraded my laptop to 11.4 & Unity.
I was unable to use the fglrx driver as I do not believe that the R690M X1200 is supported any more (Thanks ATI).

To get Unity working I used a I manual xorg.conf and used the radeon driver as I did in 10.10. Previously I had to use radeon.modeset=0 as a kernel argument in grub to avoid screen corruption. This time in 11.4 I had to remove the boot arg to get Unity to initialize.

It works ... and I must say, yes it appears sluggish. The latency appears to be the time from clicking on the icon in the Ubuntu side bar to the window for the app appearing on the desktop. There is also a lot of screen corruption around the fonts that is triggered when I launch the 64bit Firefox (makes the system completely unusable & needs a reboot). I do not get the issue when I launch 32 bit firefox.

Strangely enough the same issues I have using the Desktop with the HD 6870 occur on the laptop, such as missing gnome top panel in Compiz Cube. Also in Unity there are missing windows title bars.

Sounds like these are all Compiz errors?

Keep up the good work with Unity guys, when it works it has lots of promise to get the newbies on board!

I have a ATI X1900 and HD 3450 lying around, let me know if you want me to do some more specific testing.

Thx
Axel