Hello, i don't know whether you already heard of someone using the radeonhd-1.2.5 driver with a ATI Mobility Radeon HD 4570. If not: Well, here is the first person. I successfully installed the driver on my Dell Studio 1555 with some major performance increases to the fglrx driver. To be honest, when I bought the notebook, I was not that deep into the story of using the radeon, radeonhd or fglrx driver with Ubuntu, so I actually got all the major information about running these drivers during the last two nights --- not sleeping and spending the time in front of my notebook. I love the ideology of open-source, so I want to contribute a bit and thought of maybe just publish the experiences I got to this mailingslist; also because I love your work. At the beginning, I used the radeon driver and got an information from Ubuntu that I maybe want to activate the driver developed by ATI. I don't know which version it was, is think something about 8.x, but I'm not sure because I was not interested in this topic at that time. In the end, I activated the driver. Consequently, I had some problems like black bars when scrolling in Firefox. Additionally, STR and STD didn't work. I decided to install the newer version of the driver, which can be found at ATI's official website at http://support.amd.com/de/gpudownload/Pages/index.aspx selecting Linux x86_64 > Radeon > ATI Radeon HD 4550 series. This one worked quite well and I even got 3D acceleration support. I was used to work with compiz activated but then figured out that it causes some problems, e.g. toggling to fullscreen mode did not work that well and windows with 3D objects in them flickered or did not move with the window when I try to move or resize the window. You know, I recognized that this wasn't the optimal solution for me. As a consequence, I googled for some information about available ATI drivers (open-source or not) and decided to install the radeonhd driver. And thanks to your documentation it worked. (Of course here and there were some problems and it took me maybe three hours last night, but now it works.) Well, I haven't got 3D acceleration support now but glxgears runs with 400 FPS, which is in my case quite a lot because with the fglrx it was only 60 FPS with UXA activated and 40 FPS without. I don't know how much it would be with the radeon driver, because I did not know glxgears at the time I used this driver. And I must say that videos are displayed a lot better, e.g. vertical sync is really, really great! It didn't work that well with the fglrx driver. So, now I'm actually keen to get 3D acceleration support like it's described in http://www.x.org/wiki/radeonhd%3Aexperimental_3D. Of course it says that one should not use this howto, but actually the written commands should work, shouldn't they? I don't know whether I helped you telling you all this but it's also a nice way to say: Thank you, you did nice work here! :) Cheers from Germany, Niklaas -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org