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After quite some time I have used windows i have returned to Linux, I used to love Linux but than I had to use windows for gaming purposes.
Now, I have decided to try Linux again in dual boot with windows 7 ultimate.
Installation was pretty smooth, I successfully installed Ubuntu 10.10 (64 bit amd).
Amd phenom 2 X2 550 3.0 GHZ
Samsung 500GB hard disk
AMD ATI Raedon hd 4870
I have A few problems.
I have a dual screen setup, one 17'' screen in the left and a main 22'' screen in the middle. It works perfectly in windows but for some bizarre reason I can't manage to configure my 22'' inch screen as a main screen in ubuntu. Furthermore, when I set them together the smaller screen (which it sets as main) as some weird location issues. (may have something to do with 2 and 3).
My 17'' inch screen (mentioned above), is a native 1280X1024. But ubuntu doesn't give me that as an option. I have 1360X768 (which is over the native) and 1152X864.
This is probably the cause for the 2 first problems. I have installed ATI CATALYST control panel in order to fix those problems, and it says :
There was a problem initializing Catalyst Control Center Linux edition. It could be caused by the following.
No ATI graphics driver is installed, or the ATI driver is not functioning properly.
Please install the ATI driver appropriate for you ATI hardware, or configure using aticonfig.
I will probably come out with more problems as ill play with it.
it has been a long time since I used the proprietary driver for my ATI card (it's no longer supported). However, I do recall that I had to change some settings in the xorg.conf file to get some decent performance. Unfortunately I do not remember what exactly I changed. Maybe you could post your xorg.conf here. I assume, xorg.conf is still needed for the ATI drivers to work.
I do recall that the option
Option "MigrationHeuristic" "greedy"
was the decisive option that got my card working back years ago. I am not sure if this will also help you, but it is worth a try. If not, try google with the following search terms:
linux ati driver slow
You might also want to include your card model. Keep us posted if this solves your issue.
which ATI driver did you install from the ubuntu software manager? the ATI Binary X.org driver? because ubuntu has several different "ATI" drivers to choose from... and also if you go to System > Administration > Additional drivers does it say that the ati proprietary driver is in use?