On Sat, Jun 15, 2013 at 11:31:35PM +0200, Armin K. wrote:
> On 06/15/2013 06:32 PM, Ken Moffat wrote:
> > On Sat, Jun 15, 2013 at 05:02:12PM +0100, Ken Moffat wrote:
> >>
> >> So, although my much earlier R600 (RS780) is now using it without
> >> any apparent problems, that combination isn't really tested.
> >>
> > Fedora appear to be enabling glamor for all users of the ATI driver,
> > so it looks as if it will be in common use. Not sure if I should
> > reword or not.
> >
> > ĸen
> >
>
> Glamor won't be used unless you force it in Xorg.conf. The driver has
> to, however, be compiled against libglamor in order to use it. It was
> originaly meant for Intel hardware as a replacement to UXA, but it was
> replaced and overpowered by now popular SNA.
Thanks for the information. You are right, it wasn't being used.
I prefer to put the conf files (evdev, kbd, and now video) in
/usr/lib/X11/xorg.conf.d/ - with the following I have now had glamor
enabled on my RS780 :
12-glamor.conf
Section "Module"
Load "dri2"
Load "glamoregl"
EndSection
20-radeon.conf
Section "Device"
Identifier "Radeon"
Driver "radeon"
Option "AccelMethod" "glamor"
EndSection
Visibly, everything seemed to work ok like that. However, running
glxgears at anything larger than its default tiny window, or moving
its window across the screen, reduced the reported frames per second
to values between 37 and 54 FPS instead of the default 60 FPS. For
comparison, with glamor not enabled I get a consistent 300 - 301
frames in 5 seconds, i.e. 60 FPS.
This is a "basic" video chip [ on the motherboard ], perhaps PCI-e
cards will show better results. However, I also note that gentoo's
wiki says that glamor is only usable for R300 and newer - I've still
got an R100 radeon for hte moment, and I expect that some of our
users might have almost-as-old kit for a few more years (when I
first tried LFS, it was on an old machine that was no longer in
day-to-day use).
My current conclusions :
1. For South Islands glamor needs to be shown as required
2. For R300 through to Northern Islands glamor should be marked as
optional.
3. For R300 through to Northern Islands we should explain how to
load gloregl and turn on glamor.
I'll start another thread about /etc/X11/xorg.conf or
${XORG_PREFIX}/share/X11/xorg.conf.d
ĸen
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