Radeon Driver Default Display Resolution

[Alex Deucher]

On Mon, Mar 31, 2008 at 11:07 AM, Hamish <hamish at travellingkiwi.com> wrote:
> On Sunday 30 March 2008 14:38:47 you wrote:
>  > On Tue, Mar 25, 2008 at 8:42 AM, Hamish <hamish at travellingkiwi.com> wrote:
>  > > On Monday 24 March 2008 14:12:33 Alex Deucher wrote:
>  > >  > On Mon, Mar 24, 2008 at 8:54 AM, Greg Treantos <gtreanto at gmail.com>
>  wrote:
>  > >  > > Thanks Alex adding the modelines worked. I tried Beso's suggestion
>  > >  > > first without success. I have 2 follow up questions,
>  > >  > >
>  > >  > > 1) What changed in 7.3 that caused this issue?
>  > >  >
>  > >  > The radeon driver got xrandr 1.2 support.  Previous versions of the
>  > >  > driver assumed one monitor per driver instance while with xrandr you
>  > >  > may have several monitors.  With xrandr it is much more important to
>  > >  > get mode information about each monitor since you may have two or more
>  > >  > monitors connected with vastly different capabilities.  The previous
>  > >  > version of the driver more or less always assumed a monitor was
>  > >  > connected and forced whatever mode you specified.  You can still do
>  > >  > this, but as you see, the configuration has changed a bit.  This page
>  > >  > should give you a good overview:
>  > >  > http://www.intellinuxgraphics.org/dualhead.html
>  > >
>  > >  Sorry to appropriate the thread, but I'm also running gentoo, and having
>  > > a VERY similar problem with my setup (Dual monitors, X300 graphics, xorg
>  > > ati/radeon drivers, 1024x768 VGA-0 LCD on left, 1680x1050 DVI-0 LCD on
>  > > right).
>  > >
>  > >  In my case the Xorg log file shows the modes being probed for the two
>  > >  monitors... I've also been through the intelligraphics page and tried to
>  > >  setup for static config... BUt mine still comes up with 1024x768 on both
>  > >  monitors and requires xrandr to set 1680x1050 on the large monitor...
>  >
>  > The "PreferredMode" option did not properly work with xserver 1.3  By
>  > default xrandr tries to pick the closest mode possible supported by
>  > each monitor rather than the preferred modes.
>  >
>
>  Thanks Alex. I'll try 1.4 & see how that goes.
>
>  > >  Admittedly the Screen section confuses me a bit... Why do I specify the
>  > > total virtual screensize of both monitors in the Screen section but the
>  > > screen section only references one of the monitor sections? Do I have
>  > > that wrong? (Although it seems the same as what
>  > > www.intellinuxgraphics.org says).
>  >
>  > The monitor in the screen section is irrelevant if you specify per
>  > output monitors.  The screen defines the total desktop size in which
>  > one or more monitors can be configured.
>  >
>
>  Ah. Ta. The only docs I can really find are for 7.0 or 6.8... There doesn't
>  seem to be an up-to-date man page for radeon (xf86-video-ati 6.8.0) that I
>  can find... (The man page on my Gentoo still mentions mergedFB etc).
>
>  On the same vein... I find my X600 to be really really slow.. Painfully slow.
>  Could that be due to too a large desktop (2704x1050)? Or am I doing something
>  wrong? Is an X600 just a slow card? I thought it should be good enought for
>  compiz even... But only if you're prepared for several seconds wait whenever
>  focus changes...
>

The coordinate limits of the 3D engine are 2560x2560 and the max
texture size is 2048x2048.  Beyond these limits you are left with
basic 2D accel, which doesn't do much for modern desktops.  For now
you'll probably have better luck with XAA if you were using EXA.

Alex

>  H
>  > Alex
>
>
>