Virtual screen sizes no longer working in radeon.

[Alex Deucher]

On Fri, Mar 6, 2009 at 7:22 PM, Thomas Richter <thor at math.tu-berlin.de> wrote:
> Hi folks,
>
> due to my profession, I often have to work with larger images and use,
> for this reason, an oversized desktop on a regular sized monitor. Up to
> the 6.6.x driver series (? I hope ?) this worked correctly with the
> following configuration:
>
> Section "Screen"
>   DefaultDepth 24
>    SubSection "Display"
>     Depth      24
>     Modes      "1280x1024"
>     ViewPort 1280 1024
>     Virtual 2560 2048    # <--- this here
>   EndSubSection
>   Device       "Device[0]"
>   Identifier   "Screen[0]"
>   Monitor      "Monitor[0]"
> EndSection
>
> This gives me a screen of 2560x2048 pixels I can scroll around in.
> Exactly what I need.
>
> Unfortunately, not any longer as of 6.9.0. The above options simply do
> nothing useful at all. The screen stays the size it is.
>
> xrandr seems like a solution, as
>
> xrandr --fb 2560x2048
>
> gives me a frame buffer the right size, but: it doesn't scroll anymore
> if I hit the boundary of the screen. Alas, it's unusable.
>
> Thus, my questions:
>
> o) Any hope for a fix of this?
> o) As it seems, old versions of the driver like this chipset o.k., so
> any chance getting an older version to compile on this machine?
>
> Before you ask: No, getting a better supported graphics card is not an
> option. This is a desktop workplace at a university, and installing new
> hardware there is a major hassle as it has to go through the administration.

Virtual desktop scrolling got dropped when xrandr 1.2 support was
added to the driver.  It has since been re-added, but requires xserver
1.6 and xrandr 1.3.

Alex