[Libdlo] Multiscreen troubles with displaylink and intel
bernie at berniethompson.com
Thu Oct 8 08:49:48 PDT 2009
My testing has been nearly all with multiseat, so I'm ignorant of many of
the Xinerama and Xrandr ins and outs of getting extended desktop working.
So I may get this wrong, but some of the potential causes:
* Because xorg doesn't have multiadapter support yet -- without Xinerama on,
the displaylink and intel drivers can't coexist in the same layout, which
may be the cause of the unload. Anyone know another way in which they
* The current displaylink framebuffer driver is 16bpp (and may want to stay
that way for performance/simplicity reasons). Xinerama requires all screens
to be at the same color depth.
* Probably don't want to have a SubSection "display" today for any
displaylink device if you're using the monitor's preferred mode, as
displaylink-mod gets the best timings from EDID, there are no Depth options,
and 24bpp may cause a problem (seemed like removing that solved a problem
recently - mentioned on this list)
I'd try setting the Intel/TV to 16bpp and turn Xinerama on, and see if that
Again, I'm ignorant of a bunch of things, so I may be missing a better way.
If anyone has a suggestion, hopefully they'll hop in. And it'd be great if
you can report back if you're able to get it working.
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