Changing dimensions of a Screen in XOrg at runtime

[Reinhard Tartler]

On 5/5/05, Reinhard Tartler <siretart at gmail.com> wrote:
> On 5/5/05, ZIYAD A. M. AL-BATLY <zamb at saudi.net.sa> wrote:
> > On Thu, 2005-05-05 at 10:08 +0200, Reinhard Tartler wrote:
> > Maybe I didn't understand what you're saying (and I'm sure there are
> > much more experience people in the list whom are better than me and will
> > answer your needs) but here goes nothing: Set your '/etc/X11/xorg.conf'
> > at the largest resolution that you need (or even larger) and make sure
> > that RANDR (not a spelling error) Extension is enabled (it's enabled by
> > default unless otherwise disabled in the xorg.config file, but to make
> > sure it's enabled run "xdpyinfo | grep RANDR" from within X) and use
> > "System" --> "Preference" --> "Screen Resolution" (or use the command
> > "xrandr" from a terminal under X) to switch between resolutions whenever
> > needed/desired.
> Thank you for your explanation. I did try this out, and in fact, it
> works when not using xinerama.  Googling further brought me this bug:
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=1423
> 
> However using MergedFB gave me better results.  Thank you both, Trent
> and Ziyad for pointing me to xrandr

The mergedfb solution suits me much better, but I'd rather want to be
able to have my non rectangular Virtual Desktop from Xinerama back.
(in my case, a 1024x768 + 1280x1024 virtual desktop without scrolling
the smaller one).

This is reported here: https://bugs.freedesktop.org/show_bug.cgi?id=1956

My hardware is a ati radeon 7500 mobile, using xorg radeon driver.
Thomas Winischofer writes at
http://www.winischhofer.at/linuxsispart3.shtml, that he implemented
this in the sis version of MergedFB, so I wonder if it is included
also in the radeon version. Did anyone manage to setup this?

-- 
regards,
    Reinhard