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

[Christopher Singley]

Thanks a lot, I hadn't picked up on these architectural changes when people 
were talking about xrandr 1.2.  The man page for the new xrandr helps a lot.

It's working for me now.
I just say "xrandr --output VGA-0 --auto --right-of LVDS"
(need the --auto switch to enable the output)
To switch back, I just say "xrandr --output VGA-0 --off"

I'm grateful for the assistance (not to mention the coding); this is going to 
be a big improvement for the way I use my laptop.

If I can push my luck a little  - Andrey mentioned the idea of writing a udev 
rule, which sounds like a terrific idea.  I'm really hoping all this 
autodetection of outputs shows up in /sys somewhere;  anybody have an idea 
where I might poke around to experiment with udev?

Thanks a lot guys.

cs

On Tuesday 11 September 2007 10:23:44 Alex Deucher wrote:
> 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



-- 
Christopher Singley, CFA
President, Singley Capital Management, Inc.
tel (713) 459-0881