Some time ago I installed kubuntu-desktop on my Ubuntu 14.04 using these instructions.
However, after some time I noticed that my Eclipse started crashing often under KDE so I decided to remove it. I followed the following instructions.
Unfortunately, not all of the components could be removed, some of them were reported as non-existent. It wasn't until then that I noticed these instructions were for Ubuntu 12.10, whereas mine is 14.04, so I tried to google the answer and ended up executing several commands from the Internet, the reference to which I don't even remember (yeah, now I realize how stupid it was to blindly run all I found online in my terminal...).
Finally I followed this advice.
I was shocked when after executing the sudo apt-get autoremove I saw that multiple Linux images were removed. I was worried about the stability of my system, so I tried reinstalling Unity. I saw that it created some system image so I got calmed down.
However, when I tried rebooting my computer, the loading screen displays 'Kubuntu 14.04' (whereas before "removing" Kubuntu, when kubuntu-desktop and unity were installed, it always showed 'Ubuntu 14.04') and this is what is displayed next:
It then shows a few possible modes of running, i.e. low-graphics mode, troubleshooting etc. Unfortunately, none of them results in anything else than an infinite black screen...
Is there any chance of repairing the system? I would really like to avoid reinstalling and reconfiguring it.
I tried to solve my problem by following the instructions under the suggested link. I didn’t manage to load failsafeX, but I did enter the terminal with ctrl – alt – f1.
I checked my version of the graphics card and it is NVIDIA Corporation G98 [Quadro NVS 295] (rev a1). I then reinstalled the drivers using sudo apt-get install nvidia-current. I also reinstalled unity with sudo apt-get install --reinstall ubuntu-desktop.
After rebooting I saw the Ubuntu loading screen but the same error message appeared afterwards. I entered the terminal again and typed startx. What happened next is that the desktop wallpaper appeared and my autostart programs began to load up. However, there was no side-bar or the upper panel. I also couldn’t switch between programs using alt – f4.
I then tried executing some more commands, the results of which are presented below.
It seems to me that the graphics card somehow doesn’t recognize the monitor that is hooked up.
