I've had this issue for a while now, since I thought I could fix it myself. Almost all my programs have lost their icon image, which is not fixable by applying a different icon theme unfortunately. Just installed the Reversal icon pack to test that. My settings are attached here, sorry for the german:

I am assuming this is due to some of the weird behaviour I have had for some days months ago. Gnome would just not load and instead show me an error screen. So I had to uninstall gnome entirely, then reinstall it and that magically fixed it, but my icons were gone.

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[–] 29 points 2 years ago (1 child)

Aside: You don't ever need to apologise for your native language 😊

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  • [–] 14 points 2 years ago (1 child)

    Try running update-icon-caches as root and restarting GNOME.

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  • [–] [S] 4 points 2 years ago (1 child)

    Maybe this package isn't installed either, since I get some sort of error message: Usage: /usr/sbin/update-icon-caches directory [ ... ] I tried assigning some directory to it like this: sudo update-icon-caches /usr/share/icons But this didn't change anything either.

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  • [+] 8 points 2 years ago (1 child)
  • [–] [S] 6 points 2 years ago (1 child)

    This is all what shows up. Heres my complete terminal output:

    marty@MartyPC:~$ sudo update-icon-caches
    [sudo] Passwort für marty: 
    Usage: /usr/sbin/update-icon-caches directory [ ... ]
    marty@MartyPC:~$
    
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  • [–] 6 points 2 years ago (1 child)

    Somehow it might be possible the adwaita-icon-theme package was removed and not reinstalled.

    You could also try running dconf reset -f /org/gnome/ and rebooting to see if that helps.

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  • [–] 7 points 2 years ago (1 child)

    That command screams for a backup 😬

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  • [–] 1 point 2 years ago (1 child)

    Yikes. Something is missing. Is this Debian? You could swing by their forums or IRC and get sorted out fast. I'm sure there is a dpkg command that fixes this up. As for the icons, there is definitely a missing package related to adwaita or some lingering config file needs to be reset to defaults.

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  • [–] 2 points 2 years ago (1 child)

    Pretty sure they meant you probably should've suggested a backup or given a heads-up of some sort before running the command you brought up, since one would presumably lose all settings previously stored in dconf and that's quite the extreme measure

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  • [–] 2 points 2 years ago (1 child)

    For Gnome settings? I suppose you could backup everything. It isn't removing all dconf settings, just gnome, which is broken in this case.

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  • [–] 2 points 2 years ago (1 child)

    Have you recently fixed another issue? Perhaps run out of disk space during an update?

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  • [–] 2 points 2 years ago

    Try running your file manager or something else that displays icons from the terminal, it may log error messages.

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  • [–] 1 point 2 years ago

    Backup and do a fresh install

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