Re: [gentoo-user] Re: Anyone using xfce4 with compositing turned off?

[bitlord]

On Sat, 2015-08-22 at 19:08 -0700, walt wrote:
> On Sat, 22 Aug 2015 04:08:41 +0200
> <wabenbau@×××××.com> wrote:
>
> > I'm using XFCE as DE and xfwm4 as WM. Since I bought a new GPU
> > (Radeon
> > R7 250), I don't use compositing any more because it causes tearing
> > when I watch videos in fullscreen with 3840x2160. With this GPU I
> > also had some random freezes when compositing was enabled.
> >
> > Beside this, performance is very good, regardless compositing is
> > enabled or disabled. Scrolling text or moving windows around is a
> > bit
> > faster and smoother with compositing enabled, especially when other
> > windows are in the foreground.
> >
> > With my old GPU (Radeon HD4550) I always had compositing enabled.
> > Everything was smoother and I saw absolutely no glitches, but
> > performance was also good with compositing disabled, just not quite
> > as smooth as with
>
> I forgot about xf86-video-ati until you mentioned it, so I just
> emerged
> it and (I think) made all the changes needed to reconfigure Xorg to
> use
> it instead of fglrx.
>
> Maybe I'm just too tired right now to think straight, but the error
> messages I see in Xorg.log tell me that my video chip is not
> supported.
>
> But, in the process of switching to xf86-video-ati and then back
> again
> to fglrx I noticed this error message from xfwm4:
>
> "Error opening /dev/dri/card0: No such file or directory"
>
> Correct, I have no /dev/dri directory.  Do you have one?
>
>
For radeon (free driver) you need to configure more than Xorg, check
wiki article about radeon driver [1], It needs in kernel support, also
most cards especially "newer" (>=r600) need proprietary firmware.


[1] https://wiki.gentoo.org/wiki/Radeon