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I'm running Ubuntu 16.04.3 LTS and accidentally uninstalled python2 and everything that depends on it. Edit: According to /var/log/apt/history.log, 326 modules were removed: pastebin.com (sorted alphabetically).

I've reinstalled python2 now but apparently a lot of things are still broken. Most urgently is obviously getting a functioning mouse back.

  • When I boot my computer, I arrive at my normal desktop. Keyboard and mouse pointer work just fine, but the mouse buttons only work in the launcher -- not on the desktop and not in any launched apps.

  • I can use the mouse to launch a terminal, then type unity --replace & into a terminal (as advised in older posts). Having done that, the mouse now works inside the terminal window but not on the window frame nor anywhere else!

  • I can Ctrl+Alt+F2 and run unity --replace & from there. That appears to end the command I had running in the previous step, and when I go back to Ctrl+Alt+F7 then the mouse is working normally - but Unity's top menu bar (including the clock and system/power button) is blank.

It's a Logitech wireless mouse (M705) and I have put in a pair of fully charged batteries just to be sure and rule out the hardware.

--> What am I missing, and how do I restore my mouse clicks to normal operation without the unity workaround?

  • Removing python2 removed also all packages which depend on it. Just reinstalling python2 does not reinstall these packages. You should check in /var/log/apt/history.log which packages have been removed and reinstall them manually. I believe, this is a long list. Maybe someone here can provide a script to do that, but that's above my skills. Is this python2.7 which you removed accidentally? – mook765 Oct 28 '17 at 9:23
  • Do mouse keys work? (help.ubuntu.com/stable/ubuntu-help/mouse-mousekeys.html) – Geoffrey Wheeler Oct 28 '17 at 10:13
  • I don't understand how the mouse buttons depend on Python. @mook765 I added a []pastebin link](pastebin.com/raw/9GAiMMFm) above that lists the removed modules. Do you recommend that I reinstall ALL of them, or any in particular? – Torben Gundtofte-Bruun Oct 28 '17 at 16:21
  • I cant' help you much with that. Fact is that removing python2 removed a lot of packages and after that you are facing problems. I don't know which of these packages are relevant for the mouse. I would reinstall all of them, just to make sure that you will not face other issues in the future. It might be a bit ugly work to do that manually, but to be honest, what choices do you have? If a complete reinstall is an option for you, that might be less time-consuming. That's life, accidents happens. Always be careful when running with root-privileges. – mook765 Oct 28 '17 at 16:39
  • @mook765 you're absolutely right. And I am considering a reinstall, just to be sure. I'll first see how much trouble it is to reinstall the modules. Thanks. – Torben Gundtofte-Bruun Oct 28 '17 at 19:33
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I did something similar with another package and partially took down my desktop. Wouldn't accept any keyboard or mouse inputs. I had to ssh in from another computer to implement the repair (probably could have booted into text mode as well).

I found this handy line somewhere; on this site I think:

sudo apt-get install `grep Remove /var/log/apt/history.log | tail -1 | sed -e 's|Remove: ||g' -e 's|([^)]*)||g' -e 's|:[^ ]* ||g' -e 's|,||g'` 

Basically creates a list of all the removed packages and reinstalls them. Just run the grep part first to get a sense of what will be reinstalled.

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