I've tried numerous times to get my nvidia card running on Ubuntu with no success so far, but that's ok, I don't actually need the power nor the advanced graphics that the card provides so I'll make my peace with it and let that go.
The machine in question is a Lenovo T440s with dual graphics card, here's the "lspci -nnk" output related to the video adapters:
00:02.0 VGA compatible controller : Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) Subsystem: Lenovo Device [17aa:220d] Kernel driver in use: i915
04:00.0 VGA compatible controller : NVIDIA Corporation GK208M [GeForce GT 730M] [10de:1290] (rev a1) Subsystem: Lenovo Device [17aa:220d] Kernel driver in use: nouveau
The problem I'm facing now is that I've just made a fresh Kubuntu 14.04 install on this machine and almost everything works fine, everything but having multiple monitors.
When I connect a new monitor (either using vga or displayport) everything works fine and its even able to play sound through the displayport cable, the problem comes when I tried to disable the second monitor using the system setting interface in KDE or the special key in the laptop (F7), when it switches to only one monitor unequivocally my KDE session crash and restarts itself leaving me only the choice to unplug the monitor physically.
The only message I can get when that happens is:
nouveau E[ PIBUS][0000:04:00.0] GPC0: 0x4188ac 0x00000001 (0x1e70822e)
I understand nouveau is the open source driver for the nvidia card but I was wondering if it is possible to eliminate the nouveau drivers from my system since I don't really need to use the nvidia adapter and if that's possible how can I do it safely. And in a related question, do you guys think that that could help me with my issue?
Worth mention that I've tried Ubuntu 14.04 (Unity), Ubuntu Gnome 14.04 and even Fedora Gnome 20 (all of them fresh installations) on this very same PC and neither one showed the problem I'm portraying in here.
Thank you very much for your attention, have a good one!