I just installed [i:3qnbc1km]antergos-2014.08.07-i686.iso[/i:3qnbc1km] on a [i:3qnbc1km]Thinkpad 540[/i:3qnbc1km] and everything works right out of the box (as far as I have checked). So I also tried to upgrade my [i:3qnbc1km]Lenovo x121e[/i:3qnbc1km] netbook (from [i:3qnbc1km]Crunchbang/Debian Wheezy[/i:3qnbc1km]) to have the same system on my both of my laptops.
On the [i:3qnbc1km]x121e[/i:3qnbc1km] I did not have any problems with the grafic card, which is a [i:3qnbc1km]Radeon HD 6310[/i:3qnbc1km]. It also ran okay starting [i:3qnbc1km]Antergos[/i:3qnbc1km] from iso installed on a usb stick. Now having installed it, the grafic card performs very, very poorely, showing huge black artefacts and slow or almost unusable rendering of desktop elements.
I tried several optimization tipps listed e.g. in [url:3qnbc1km]https://wiki.archlinux.org/index.php/ATI[/url:3qnbc1km] without any effect. Up to now I did not try to install the proprietary driver (catalyst) driver as
1. the card did obviously work with the oss driver for [i:3qnbc1km]ati/amd radeon[/i:3qnbc1km] (under [i:3qnbc1km]Crunchbang/Debian Wheezy[/i:3qnbc1km])
2. the card works running the [i:3qnbc1km]Antergos[/i:3qnbc1km] live systems
Is there a chance to find out and set up the configuration which the live systems has?
I do not have clue, what I can do to 1. find out, what goes wrong and 2. to set up the card in order to regain the performance it had.