assert failed when trying to output nouveau on UDL device
Intel/Nvidia laptop (MSI GP70), Xorg 1.20.8, UDL device connected. Nouveau as Nvidia driver. Xrandr shows three providers: 0 - modesetting for Intel, 1 - nouveau, 2 -modesetting for UDL.
xrandr --setprovideroutputsource 2 1 results in crash due to assertion failing:
in dix/dispatch.c:4036 assert(!new->is_output_slave);
This not necessarily has to be possible, but in such case shouldn't it be handled more gracefully instead of just crashing and dumping the core?