Problem with screen resolution on laptop.

[sivare]

Hi! I've been using Salix for a few months in my desktop computer and I'm really happy with it (although I'm not a really advanced user) but last weekend I tried to install it on my laptop without success. Everything seems to work fine but the screen resolution doesn't works, it's always 1024x768 but I know for sure my screen supports 1366x768. Searching on Google I found something about xrandr and xorg.conf but I couldn't add the new mode, when I type xrandr I get the following error:
"xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024x768, current 1024x768, maximum 1024x768
default connected 1024x768+0+0 0mm x 0mm
1024x768 0.0*"
as oppossed to the info I get when I type it on my desktop in which I have a lot of options and instead of default it says VGA1. I also search in this forum and just monitor+resolution+problems (I'm not allowed to post URLs) but it's not exactly my problem, there I read that xorg.conf is not used anymore, where can I get some info about the files on xorg.conf.d?.
When I type lspci | grep VGA I get this 2 lines:
"00:01.0 VGA compatible controller: ATI Technologies Inc Device 9648
01:00.0 VGA compatible controller: ATI Technologies Inc NI Whistler [AMD Radeon HD 6600M Series]"

Finally, first I thought that maybe my monitor was not supported on Linux, but I tried a live cd based on Ubuntu and the resolution was fine, on 1366x768. I know I could use Ubuntu but I really like Salix, so any help will be greatly appreciated.

[thenktor]

I suggest to try the AMD Radeon binary driver.

[sivare]

Thanks a lot!, it works perfect now ...

By any chance you know where to find more info about screen configuration, and video on Linux, I've been trying to find something to know about the drivers and framebuffer and all that, but I did not even know there was a AMD binary driver, and still can't figure out how it works (xrandr, xorg and stuff), any suggestion will be appreciated, a link to an article or some words to search on Google for better results. Thanks again.