On Fri, 02 Oct 2015 09:44:19 +0200 Thomas Wunder <[email protected]> wrote:
>Hi all, > >Recently I got a new workstation consisting of these components: >Two 4K Monitors (DP 1.2 at 60Hz), i7-5820K (not yet overclocked), MSI >X99A- based mainboard, Radeon R7 250. >This is the software I'm running on it (Debian Jessie): >Linux 3.16.0 Debian build 4, fglrx 14.9, xorg 7.7, (KDE 4.12) > >Problem: >"Graphics stuff" seems to work smoothly on lower resolutions (e.g. 2x >2560x1600). On high resolution (2x 3840x2160) still everything >(moving/resizing windows, playing videos, scrolling through lists, >text views or consoles, opening menus) goes smoothly but only as long >as single windows are really small (and as long as there are not too >many of them). As soon as a window becomes half the size of a screen >or even full screen, operations mentioned before become horribly slow >(K-Menu takes up to 8 secs to even open up) and CPU usage of the Xorg >process is vastly increasing (to about 100%). I don't really have an >idea of what's going wrong here. There are no apparent errors etc. >The only thing that seems really suspect to me is the 100% CPU which I >would attribute to a (multi-)threading issue... I'd really appreciate >if you could give me a hand and point me to the right direction to get >things working. > >Cheers > Thomas http://gpu.userbenchmark.com/Compare/AMD-R9-380-vs-AMD-R7-250/3482vsm8217 Get a real card would be my advice. _______________________________________________ [email protected]: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s
