[Linux-fbdev-devel] Radeon X300, radeonfb, dual head

[Alex Deucher]

On 4/18/07, Hans-Jürgen Koch <hjk at linutronix.de> wrote:
> Am Mittwoch, 18. April 2007 17:02 schrieb Hans-Jürgen Koch:
> > Am Mittwoch, 18. April 2007 15:45 schrieb Michel Dänzer:
> > > On Wed, 2007-04-18 at 14:09 +0200, Hans-Jürgen Koch wrote:
> > > >
> > > > 1.) I compiled radeonfb statically into my kernel and booted with
> > > > video=radeonfb:1280x1024-32 at 60. This works fine, the framebuffer
> > > > console works as expected. But the X server doesn't come up
> > > > properly. Xorg.0.log ends like this:
> > > >
> > > > [...]
> > > > (**) RADEON(0): RADEONSaveScreen(2)
> > > > (**) RADEON(0): FIFO timed out: 2 entries, stat=0x80026102
> > > > (EE) RADEON(0): FIFO timed out, resetting engine...
> > >
> > > Please file a bug for this at http://bugs.freedesktop.org if it hasn't
> > > been reported yet.
> >
> > I'll do that, but want to experiment a little bit more first.
>
> I found that compiling radeonfb into the kernel never works. X server
> is hanging at 100% CPU, almost completely blocking the system. Even
> a ssh login becomes so slow (about 30 seconds to respond to a key press)
> that it is practically useless.
>
> Should I also report this as a bug against radeonfb ?
>
> I don't have that effect with vesafb. I also disabled framebuffer support
> completely and booted with a VGA console, this also works.
>
> But even with vesafb or VGA, the X server shows the same picture on
> both monitors. It starts without errors, even AIGLX comes up,
> glxgears says 1400fps (Core2Duo at 1.86GHz).
> KDE control center shows the settings as they should be, and in fact
> the X server uses a screen with 3360x1050. But instead of displaying
> the left half on the left monitor and the right half on the right,
> it shows the right half on both monitors.
>
> Could it be possible that X in fact draws both halves correctly, but
> some "internal switch" connects both connectors to the same output?
>
> Could it be a problem that I use a DVI-VGA-adaptor for one of the
> monitors? I don't get a digital DVI signal at that output, is this
> normal?
>
> Any ideas?

Can you post your full Xorg log and the config you are using?  Also
what release of the Xserver and radeon driver are you using?

Alex