[ltp] Radeon: hot-swap VGA-out monitor

[Alex Deucher]

On 9/9/07, Christopher Singley <csingley@singleycapital.com> wrote:
> On Friday 07 September 2007 08:48:04 Andrey Kislyuk wrote:
>
> > You need not only xrandr 1.2, but also >=libxrandr-1.2.1,
> > xorg-server-1.3, libdrm-git, and xf86-video-ati-git. (These are now out
> > as part of xorg 7.3.) The easiest way I've found to use display hotplug
> > is to run randr --auto when adding or removing a display, and configure
> > the resolution of each output. This can be completely automated in a
> > udev rule, but I haven't seen one yet.
> >
> > -ak
>
> xorg-7.3 made it into Portage (thanks guys!) and I installed the update; I
> downloaded xf86-video-ati-6.7.192 and installed that manually.
>
> That has got the display hotplug working -- it looks like pretty impressive
> work, too.
>
> However, the radeon driver's mergedFB seems to be no longer working.  It's
> always just in clone mode; I can't get a 2048x768 desktop.  Whether
> I hotplug the external monitor or start X with it attached, Xorg.log always
> gives this output:
> ===
> (WW) RADEON(0): Option "MergedFB" is not used
> (WW) RADEON(0): Option "CRT2Position" is not used
> (WW) RADEON(0): Option "MetaModes" is not used
> (WW) RADEON(0): Option "CRT2HSync" is not used
> (WW) RADEON(0): Option "CRT2VRefresh" is not used
> ===
> I notice that the man page for radeon that ships with this version of
> xf86-video-ati has an abbreviated list of options that doesn't include all
> the MergedFB stuff.  Is it the case that this functionality just hasn't yet
> been ported to the new driver?
>
> Have you (has anyone) got MergedFB working with the new xorg?
> Or regular Xinerama, for that matter -- anything that does a dubl-wide
> desktop?

mergedfb is dead and gone.  use xrandr, e.g.,;
xrandr --output VGA-0 --right-of LVDS

depending on how big a desktop you want, you may have to add a virtual
line to your config since we have to statically allocate buffers until
we finish memory management support for the drm.

Alex