After some reinstallation/configuration/partition resizing work (I really can't say where the point of failure was, but see below for details), I ended up with
unity not working anymore, a situation essentially similar to this or this: login works, and then I just get a blank screen.
I've tried several things listed in those questions, like restarting various stuff, purging and reinstalling
ubuntu-desktop, or deleteting their config files. Also using
compizconfig-settings-manager and re-enabling the Unity-plugin didn't help (although it was disabled, in case that's relevant information).
I then just tried to install alternative desktop environments and display mangers, and that's where things started to get weird: namely, it turned out that
openbox do work under both
gnome-shell don't work on either (after login, just a background image appears and nothing more).
One additional thing that sometimes happened in
lxde was that an "Internal Error" box showed up, containing (among others) the following information:
Title: xorg crashed with SIGABRT in __libc_message()
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins
(but this only showed up after I already reinstalled and changed many things, so it might be related to problem or not).
Now, I have no idea where the failing is actually happening, but I suspect
What I actually was doing before this happended:
- Installing 14.04 on a separate partition (1) from the original installation (2) (also 14.04)
- Normal login, so the default
- Installing some programs
- Mounting my old
/homefrom the old installation, which is on a third partition (3), as
/homefor the new installation (and setting this in the new
- Installing more stuff, and deleting some config directories/files from
~which I thought are not needed anymore
- At some point here, I have also used
unity-tweak-tool, but only to increase the number of virtual workspaces
- Resizing partitions (1) and (2)
After the last reboot, said things happended. I don't think the partitioning stuff plays any role, but I mention it for completeness; but maybe my reusing the old
/home did something weird? On the other hand, I (think I) rebooted at least once with it mounted as
/home of the new install, without problems.
I also use a dual-monitor setup, but that has never caused any problems.
The question is: is there anything else I could do for getting
unity back and
gnome-shell work? Or should I just reinstall everything -- in which case, should I not just reuse the old
/home, or would that not be a problem?