I would like to spread my desktop across 3 monitors, having been using only 2 until now against my GeForce GT 730/PCIe/SSE2. I have read mixed accounts of whether that is possible or not, some of them quite old. When I plug the third monitor in, it immediately becomes visible in the System Settings -> displays window, but trying to activate it from there results in two windows of mostly awkward error messages - it never activates.
Would be nice managing to configure this, either by a driver upgrade or whatever, rather than adding a another card. Any advice? should I check my driver version?
While these error messages describe many display modes, each my displays trivially works with this computer when it is part of a two monitor ensemble, so there is no problem with the card matching the right display mode for any given monitor of the three.
BTW Nvidia product pages have been very dubious about this kind of support last I looked a while back, maybe you may have greater clarity reading them.
Here's some driver version information,
vendor : NVIDIA Corporation
modalias : pci:v000010DEd00000F02sv00001462sd00008A9Fbc03sc00i00
driver : nvidia-346-updates - distro non-free
driver : nvidia-340-updates - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
driver : nvidia-346 - distro non-free recommended
driver : nvidia-340 - distro non-free
from running sudo ubuntu-drivers devices. Not sure how that particular output really makes sense; which driver is being used is unclear from it.
And here's another useful output correctly depicting the max resolution of each of the monitors, while they are all connected, but only two of them "active", whereas it is the hopeful goal to get all three active and spreading the desktop among them.
$ xrandr
Screen 0: minimum 8 x 8, current 3286 x 1080, maximum 16384 x 16384
DVI-I-0 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0*+
1680x1050 60.0
1440x900 59.9
1280x1024 75.0 60.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
VGA-0 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 410mm x 230mm
1366x768 59.8*+
1280x720 60.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected (normal left inverted right x axis y axis)
1920x1080 60.0 + 59.9 50.0
1280x720 59.9
1024x768 60.0
800x600 60.3
720x480 59.9
640x480 59.9
