help On 3 October 2015 at 20:00, <[email protected]> wrote:
> Send xorg mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.x.org/mailman/listinfo/xorg > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of xorg digest..." > > > Today's Topics: > > 1. Re: Dual 4K slowness due to xorg threading concept? > (Thomas Wunder) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 03 Oct 2015 12:06:47 +0200 > From: Thomas Wunder <[email protected]> > To: [email protected], [email protected] > Subject: Re: Dual 4K slowness due to xorg threading concept? > Message-ID: <1897081.Xq4AIt4pgz@i7wstom> > Content-Type: text/plain; charset="iso-8859-1" > > On Freitag, 2. Oktober 2015 07:23:57 PDT, Thomas Lübking wrote: > > On Freitag, 2. Oktober 2015 12:59:30 CEST, Christopher Barry wrote: > > >> 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. > > > > You're likely running into texture/shader limitations and fallover to > some > > software emulation - the GPU is indeed not fully suited for such > > resolutions. > > > > => suspend the compositor (SHIFT+Alt+F12, no shadows, no translucency) or > > use the XRender backend (kcmshell[4] kwincompositing") *Maybe* even > > disabling the blur filter and setting the scale method to anything but > > "accurate" (ie. try smooth) might aid. > > > > Cheers, > > Thomas > Hello Thomas, > thanks for your reply (which I haven't received through the mailing list > for > some reason but found it on the archive site). Your advice of switching > from > OpenGL to XRender did the trick. Now things are running much smoother than > before. For the long run I think I would go for a more powerful GPU just as > Christopher suggested. > > Thanks a million! > Thomas > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > xorg mailing list > [email protected] > http://lists.x.org/mailman/listinfo/xorg > > ------------------------------ > > End of xorg Digest, Vol 123, Issue 4 > ************************************ > -- Gary Smith [email protected]
_______________________________________________ [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
