Just some update on the 'progress'
shashir's advice was to compile MESA, but this didn't make a difference. To top this off, I followed http://dri.freedesktop.org/wiki/Building
to build X from CVS. This pretty much made
starting X impossible, but I can't remember the specifics...I reinstalled slackware's own X again real fast.
I followed LiNuCe's suggestion and installed the two archives. Now, the driver correctly finds my external monitor so I have a lovely mergedfb, which I was also trying to get to work. However, the dri has become worse. Loading the dri module form xorg.conf now causes X not to start at all...
Symbol noXFree86DRIExtension from module /usr/X11R6/lib/modules/extensions/libdri.a is unresolved!
*** If unresolved symbols were reported above, they might not
*** be the reason for the server aborting.
Fatal server error:
Caught signal 11. Server aborting
Commenting out the DRI parts makes the server start, but no direct rendering of course. There are no errors being reported, and only warnings when the driver is looking for the vrefreshrange of the monitor.
Disabling the mergedfb to only load one monitor doesn't solve anything.
I also installed the archive http://dri.freedesktop.org/snapshots...x.i386.tar.bz2
but this didn't
make a difference.
I'm taking a small break from this all, as I'm already happy that mergedfb works nicely and I have exams coming up. When I get around to it, I'll try all this again, because I might have messed up a few things installing all the packages.
Thanks for the advice so far!