Dual monitor on radeon

[Alex Deucher]

On 3/31/06, Stuart Langridge <sil at kryogenix.org> wrote:
> > Please read the list archives!  This question gets asked at least
> > twice a day.  Dualhead on radeon was broken in 7.0.  you will need to
> > use Xorg cvs HEAD or the ati-1.0-branch.  Alternatively, there are x86
> > binary cvs snapshots here:
> > http://dri.freedesktop.org/wiki/Download#head-55420c59a1c2e9a70f07a6fa02f0d228ffb87b76
>
> I've similarly experienced dualhead not working with my Radeon Xpress
> 200M, and tried using the binary DRI drivers as above (specifically
> the 20060330 build) on Ubuntu Dapper. Sadly they didn't work; when X
> started with the new drivers installed, the screen was just black. (It
> was obviously *working*, just that the screen was black.) I used the
> install.sh script in both -common- and -radeon- drivers to install
> them.

There may be issues with XPRESS chipsets since they are completely
undocumented and mostly work by luck and guessing.  It's possible the
XPRESS chips may only have one DAC.  if this is the case, try
uncommenting the line below in radeon_driver.c and rebuilding the X
server:

	info->ChipFamily = CHIP_FAMILY_RS400;
	info->IsIGP = TRUE;
	/*info->HasSingleDAC = TRUE;*/ /* ??? */
        break;

If it works let me know and I'll get it committed to cvs.

Alex

>
> --
> sil
>
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>