I am curious if the Alt + F2 xkill command has been replaced by something similar, or if it has been removed entirely.

I know we can use other methods to stop processes, I'm just curious.

  • It is working fine in my main installation. What do you get when you run xkill in terminal?
    – Kulfy
    Jan 15, 2019 at 18:37
  • @Kulfy My cursor doesn't change. Nothing seems to happen. Jan 15, 2019 at 18:38
  • I mean not in Alt+F2 dialog but in terminal (which is usually launched using Ctrl+Alt+T)
    – Kulfy
    Jan 15, 2019 at 18:39
  • It works fine then. I didn't know it would work from the terminal. Jan 15, 2019 at 18:39
  • It would work fine in terminal. So here I see the problem that you are not able to use xkill from Alt+F2. Right? Can you run other commands? Like what happen if you run nautilus in Alt+F2 dialog?
    – Kulfy
    Jan 15, 2019 at 18:43

1 Answer 1


This looks like a bug under x11 in 18.04. I've tried this in at least 3 systems before landing to this conclusion. xkill if run in a "Run Command" dialog which appears after using Alt+F2 seems to occasionally don't actually execute the command and return "the cursor" instead of X (cross sign). I haven't found a bug report yet and still searching for it.

As of now you can switch to "Wayland" and xkill seems to work normally under Wayland. To switch to wayland, click on gear icon and select "Ubuntu on Wayland".

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