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I've installed gromit and gromit-mpx, but nothing happens when I launch them.

http://manpages.ubuntu.com/manpages/focal/man1/gromit.1.html

https://www.systutorials.com/docs/linux/man/1-gromit-mpx/

wolf@linux:~$ sudo apt install gromit
Reading package lists... Done
Building dependency tree       
Reading state information... Done
gromit is already the newest version (20041213-9build1).
0 upgraded, 0 newly installed, 0 to remove and 20 not upgraded.

wolf@linux:~$ sudo apt install gromit-mpx 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
gromit-mpx is already the newest version (1.3-1).
0 upgraded, 0 newly installed, 0 to remove and 20 not upgraded.

Nothing happens when I launch them:

wolf@linux:~$ gromit
wolf@linux:~$ gromit-mpx 
wolf@linux:~$ 

Any idea how to use this tool?

  • Which display server do you use - Xorg or Wayland? Please show the output of echo $XDG_SESSION_TYPE. What is your current desktop environment? Please add output of echo $XDG_SESSION_DESKTOP. – N0rbert Oct 17 at 9:42
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    After running gromit, did you press the Pause key? The Pause key is reached through Fn+PgUp in my notebook. – FedonKadifeli Oct 17 at 9:52
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gromit uses the Pause key to control it. When you run gromit from command line or from its desktop icon, it starts and waits in the background.

  • To activate it you need to press the Pause key. Pressing Pause once more will make gromit wait in the background again. So, this key acts as a way to toggle painting.
  • Use the Shift+Pause key to clear whatever you have drawn.
  • Use Ctrl+Pause to toggle the view of whatever you have drawn.
  • Use Alt+Pause to stop and quit gromit.

Note: Most notebook keyboards will not have a separate Pause key. On my keyboard the Pause key is reached using the Fn+PgUp key. So, to quit gromit for example on my notebook, I have to use Fn+Alt+PgUp on my keyboard.

See the man page on how to change the Pause key to something more easy accessible.


gromit itself is not very useful, since it starts drawing from the left-top corner of your screen and connects with straight lines the area where you have released your mouse and then pressed the mouse key again. So, it is better to use gromit-mpx which allows you "to make multi-pointer annotations on your screen". gromit-mpx uses the F9 key instead of the Pause key, so:

  • Press F9 key to toggle painting.
  • Use the Shift+F9 key to clear whatever you have drawn.
  • Use Ctrl+F9 to toggle the view of whatever you have drawn.
  • Use Alt+F9 to stop and quit gromit-mpx.

The F9 key can be changed to something else. See its man page.

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