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I made the terrible mistake of installing xubuntu-desktop. Following this answer I was able to purge almost all XFCE related components. However, the bright blue mouse-themed wallpaper is still shown when I login, logout and reboot. How do I get rid of this and revert it to the default wallpaper? I tried this suggestion, but it had no effect.

Cerin
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    It may not be a wallpaer, but instead a plymouth screen (which shows on boot, shutdown & reboot). Try sudo update-alternatives --config default.plymouth followed by sudo update-initramfs -u (first will show a list of plymouth screens installed; you select one, second command re-creates initial-ramdisk to reflect change)... – guiverc Jul 23 '18 at 02:57
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    @guiverc That was it, thanks. Consider leaving an answer. – Cerin Jul 23 '18 at 03:15

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My suspicion (now confirmed) was that it wasn't a wallpaper, but in fact a plymouth screen. The plymouth screen is the 'splash' graphic screen that hides the boot messages.

Use the commands

sudo update-alternatives --config default.plymouth
sudo update-initramfs -u

The first command will show a list of plymouth screens installed; letting you select one. The second command re-creates initial-ramdisk to reflect change which you'll see next time.

guiverc
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  • FYI: if you didn't have the XFCE 'mouse' option; it'd already been deleted when you removed the DEsktop (which is a great one in my opinion); and would possibly have been replaced when the second command was next run, which may have been next kernel upgrade etc... But this is a guess. – guiverc Jul 23 '18 at 03:22
  • Did not work for me. Ubuntu 22.04. – Thanasis Mattas May 07 '23 at 07:49