I have a huge problem which has been adressed often: My launcher, panel, etc. is gone.
My system is Ubuntu 16.04 (on a notebook) and I was installing some themes (flatabulous, paper, arc, also installed ubuntu-tweak-tool and gtk-theme-config) and I don't know what exactly triggered it, but before I noticed the launcher and menu panel was gone.
I should note that my laptop was connected to my TV (and I put the display on the TV only) and I set the display to be scaled by a factor (1.35) on the TV and now that I have disconnected the TV, on the built-in monitor, the display still appears scaled! I tried reseting the scaling via system settings, but that doesn't work. Weird thing is also that when I login, the mouse stays at normal size for few moments and then gets enlarged now!
It gets wierder: When I login as a guest, the launcher and everything appears as it should (with correct scaling)! Also, when I type "unity" or something similar in the terminal, the menu panel appears for a second before disappearing again! It seems like something is overriding the unity or something like that.
What I have tried so far: All the 'dconf reset' and 'setsid unity' didn't work. I installed compiz-settings-things, tried enabling unity plugin (and enabled opengl, etc etc) and rebooted, and it didn't help. Also tried reinstalling ubuntu-desktop, unity, etc., no change. I'm slowly going crazy since I have the feeling I tried almost every solution I found via google. I also already uninstalled all themes I installed, but nothing changed.
If someone could help me, that would be GREAT! I'm going mad here T_T
EDIT: I could reset the scaling by installing unity-tweak-tool again and change the font scaling setting there, so the whole problem might be related to this tool (changing the unity settings doesn't do anything though). I also realize that I can't resize windows, only maximize them.
EDIT2 (Solved): I created a 2nd account (where unity worked without problems, of course) and compared the home directory of both accounts (the broken one and the new, normal, working one) and randomly deleted / renamed setting files and folders (the ones starting with "."; I clicked "show hidden files" before) in the broken directory which were different from the new account. Especially I also deleted the cache. When I logged back to the old account, suddenly the launcher (and panel) worked again. NO IDEA what exactly 'repaired' the problem, but for now, I'm just glad it works again. The icons on the launcher are reset, i.e. I have to dock my programs to it again, but I can definitely do that much.
I had the same problem, after a simple update apparently.
"reset compiz" and "setsid unity" didn't work either.
Inspired by the "method" above, I typed :
cd .cache
mv configcompiz-1 configcompiz-1_oops
then I rebooted and now it works : panel and launcher are back !
Thanks to you !
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