On Tuesday 23 November 2010, Nikos Chantziaras wrote:
> On 11/22/2010 09:40 PM, Robin Atwood wrote:
> > On Tuesday 23 November 2010, Nikos Chantziaras wrote:
> >> On 11/22/2010 07:02 PM, Robin Atwood wrote:
> >>> I have just gone through the steps to use the Radeon KMS driver on my
> >>> old laptop which has an RV350 [Mobility Radeon 9600 M10]. Everything
> >>> seems to work all right and I get the right "render string" from
> >>> glxinfo. However, I thought it might enable compositing to work on the
> >>> KDE4 desktop but there is no change. What's more, glxgears used to
> >>> give about 2200 FPS but now it's 50! So have I been wasting my time?
> >>
> >> You have to enable compositing yourself in System Settings.
> >
> > Of course, but it didn't take.
> >
> >> KMS means you're using DRI2 now, which results in a VSync'ed OpenGL
> >> rendering. Though I'd expect 60FPS because of VSync, not 50 :-P
> >>
> >> One other thing you should do is to enable the "gallium" USE flag and
> >>
> >> re-emerge Mesa. Then switch to the Gallium driver using:
> >> eselect mesa r300 gallium
> >>
> >> Because that driver is the recommended one for your hardware (R300).
> >> The classic driver should be avoided.
> >
> > Thanks, I would try that, but...
> >
> > # emerge -av media-libs/mesa
> >
> > These are the packages that would be merged, in order:
> >
> > Calculating dependencies... done!
> > [ebuild U ] x11-libs/libX11-1.4.0 [1.3.6] USE="-doc -ipv6
> > -static-libs - test (-xcb%*)" 2,036 kB
> > [ebuild R ] media-libs/mesa-7.8.2 USE="nptl pic xcb -debug
> > (-gallium) - motif (-selinux)" VIDEO_CARDS="radeon -intel -mach64 -mga
> > -nouveau -r128 - savage -sis -svga -tdfx -via" 0 kB
> >
> > I set "gallium" in /etc/make.conf but (-gallium) means the flag is turned
> > off in a profile somewhere?
>
> Oh, you're not on ~arch. I assumed to much. I don't know how that
> works on old versions of the drivers and Mesa, or whether Gallium3D was
> any good with old versions of Mesa. I can only confirm that it works on
> recent versions.
>
> For your KDE problem, try adding/changing these in your
> ~/.kde4/share/config/kwinrc:
>
> [Compositing]
> Backend=OpenGL
> CheckIsSafe=false
> DisableChecks=true
> Enabled=true
> GLDirect=true
> GLTextureFilter=1
> GLVSync=false
> OpenGLIsUnsafe=false
When I try to enable compositing KDE gives a message that it's not possible.
Setting "Disable checks" also gives an error message. So I cannot see any
actual benefit.
Thanks for the tips!
-Robin
--
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Robin Atwood.
"Ship me somewheres east of Suez, where the best is like the worst,
Where there ain't no Ten Commandments an' a man can raise a thirst"
from "Mandalay" by Rudyard Kipling
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