$DISPLAY not set.

[rominail]

General information:

• OS name: Ubuntu
• OS version: 23.04
• OS architecture: 64 bits
• Resolutions:
  • Monitor 1: 800x600
  • Monitor 2: 1920x1080
• Python version: 3.11.4
• MSS version: 9.0.1

For GNU/Linux users:

• Display server protocol and version, if known: X11
• Desktop Environment: Gnome

Through the usage of pombo, when using it from CLI there is no problem, when executed from the cronjob I get the message "$DISPLAY not set."
I don't know if I should change any conf for the crontask or if it's something with the library as it use to work (but I don't know when it stopped)

[BoboTiG]

When you execute anything from a cronjob, you have to define DISPLAY yourself.

1. Get the current value in a terminal:

   $ echo $DISPLAY
   :0

2. In your cronjob:

   * * * * * DISPLAY=:0 COMMAND

   Adapt the frequency, what is important is to prefix the command with DISPLAY=:0 .

[rominail]

Thank you!

[rominail]

For information for other person who might experience the same issue (and might be nice to put it in the linux doc)
I also added XAUTHORITY=/run/user/1000/gdm/Xauthority in my root crontab

[WanMMao]

May I ask if using crontab still results in $DISPLAY not set? Is there something wrong with me？

[rominail]

I don't know if there is something wrong with your code what I did is :

# m h  dom mon dow   command
DISPLAY=:0
XAUTHORITY=/run/user/1000/gdm/Xauthority
*/15 * * * * /usr/local/bin/pombo 2>/dev/null

Also, if your issue is not related to the repo, open an issue on a dedicated website (eg: stackexchange)