Ubuntu - Dual screen impossible by unity crash

Question

I recently received my new hardware. I installed Ubuntu 15 but got an error with my dual screen. I downgraded to the stable 14.04 ... But still the same.

I have two monitors connected in HDMI and DVI on my GTX970 by Strix.

The two of them are mirroring themselves. I tried to go in the "Displays" preference menu, but the window shuts down with :

Sorry, Ubuntu 14.04 has experienced an internal error.

The detail reports this message : unity-settings-daemon crashed SIGABRT in g_assertion_message()

Also, the Ctrl+Alt+T shortcut does not work.

It's a fresh install, I did not do anything ... Is this the hardware ? What can I do to fix it and be able to extend my desktop ?

Answer 1

It now works, not properly but it is ok.

After tweaking in the menus, i managed to reach a button where i could enable nVidia binary tested driver. The computer crashed and after a reboot the two screens were in extended desktop, but inverted (had to go left to hoover the right screen).

I tried to go in "Displays" which now works but not the "apply" button (an error says i can't apply changes).

But then i used these commands (they didn't work earlier, saying internal error) :

xrandr --output DVI-I-0 --off
xrandr --output DVI-I-0 --auto --right-of HDMI-0

And now, the terminal shortcut works an the monitors are in extended desktop mode, all i asked. I just hope that the error in the preference menu will not cause further problems.