Good day, I have recently got a Lenovo G570 and installed Arch Linux on it. As it turns out (lspci), the laptop has 2 graphical controllers - an Intel built-in one, and an AMD Radeon HD 6300. Now, after installing both Intel and Radeon drivers, X appears working, but I think it only utilizes the Intel one. How (and is there at all a way to?) do I configure X to utilize the Radeon card instead of the Intel one? Thanks.

Can you disable the intel graphics in your bios setup? I think that's the only way to get it to use the radeon card. Your intel hardware is designed with the power saving feature of using the integrated intel graphics most of the time and only switching to the radeon card for graphically demanding applications. That feature is not yet supported under linux AFAIK. You have to disable the integrated intel graphics to get your system to use the radeon card and not all bioses have the option to do that.

Hm, the BIOS on my laptop is silly and won't let change a lot of stuff. But whatever.

I have dug around with X configs (/etc/X11/xorg.conf.d/), and so far, I have found out something interesting... So, this is my /etc/X11/xorg.conf.d/10-monitor.conf:
Using this config (and without this config at all), it works properly (0:2:0 is the PCI ID of the built-in Intel card).

Now, if I change it to something like this:
1:0:0 is the PCI ID of the radeon card reported by lspci
It stops working with a segmentation fault error. However, if I try to use this on a non-radeon card PCI ID, it just says "no screens found". Does that mean that I will be unable to utilize that card under Linux, or this is a fault of the drivers or something like that? Wonder if anyone else got this working.

Check this thread out:

https://bbs.archlinux.org/viewtopic.php?id=120622

particularly, Coacher's post re MUX and MUX-less displays. See also:

http://forums.dolphin-emulator.com/s....php?tid=17668

You probably have "MUX-less" hardware and that is not currently supported under linux.