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I suddenly had my unity crashed. Dashboard and launcher have suddenly stopped functioning.

I saw the following thread: Unity doesn't load, no Launcher, no Dash appears

However when executing the command

DISPLAY=:0 ccsm &

I am receiving the following error:

"*ImportError: /usr/lib/x86_64-linux-gnu/libharfbuzz.so.0: undefined symbol: FT_Reference_Face*"

I also tried to reinstall unity by running

sudo apt-get install --reinstall ubuntu-desktop

and

sudo apt-get install --reinstall unity

but the same issues appear.

Any ideas on what is the problem?

  • Switch to a tty-session (Ctrl-Alt-F1), log there, so type this: export DISPLAY=:0 && unity --replace & Inspect messages you have. – Redbob Oct 2 '17 at 18:37

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