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All animations were working in 17.10 before upgrading. Afterward, no animations.

The "Animations" toggle in tweaks is "On". I've confirmed that using the dconf editor. I tried toggling it, but all animations seem to be off either way, including the dock hiding, which I turned on. When a window approachs the dock, it simply vanishes as if the animations were off.

I checked journalctl -b0 for any clues but there's no warnings, failures, etc.

I did try a Wayland session for kicks but that completely failed. Related?

Anyway, at least everything else in the Xorg session appears to be working just fine. It's not a big deal. But I'm mystified.

Any ideas?


Solution

Okay, I figured this out. The artful installer left nux-tools, left over from unity, in a half-installed state but did purge it. This left a start up script in /etc/X11/Xsession.d which interfered with the gnome-session in bionic. Purged that and the problem was gone.

So this is a dependency bug in the nux-tools package (or perhaps some mistakenly identified changed file which the package partly installed and turned into evil cruft). Sigh. Took me a long time to find this.

May this report help somebody else. Be careful to remove all of nux-tools which switching over from Unity.

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  • How did you figure out which script it was? I have a dozen..
    – Pithikos
    Aug 2, 2018 at 21:11
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    I skimmed through them. Most of them are not that long. Anyway, the one you need to worry about is /etc/X11/Xsession.d/50_check_unity_support.
    – Martin W
    Aug 3, 2018 at 22:33

1 Answer 1

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I solved this by installing and using vanilla-gnome-desktop on my ubuntu 18.04

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