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I cannot use the user the gnome-shell-extensions-user-theme because there is no button on the tweak tool to enable extensions! I've completely uninstalled and reinstalled the gnome-tweak-tool, no difference. Any suggestions? Bruce.

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Having the same issue, didn't notice this post before, here is mine: askubuntu.com/questions/74119/… let me know if you figure out the problem – sadmicrowave Oct 31 '11 at 16:02

2 Answers

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I had the same problem. Seems that the file metadata.json has a wrong shell-version. At least for Ubuntu 11.10. To solve the issue I had to:

  • cd ~/.local/share/gnome-shell/extensions/
  • cd into the desired extension directory.
  • edit the metadata.json file and change
 
"shell-version": [ "3.3.2" ] 
to 
"shell-version": [ "3.2" ],
  • logout from Gnome-Shell and login again. Now you should see all the estensions in gnome-tweak-tool.
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Had the same problem 10 minutes ago :D. This very brief command saved the day:

sudo apt-get remove fglrx*

It purges all installations and references for the proprietary graphics driver and once you restart gnome-shell, 3D acceleration is re-enabled and gnome-shell plus other applications requiring 3D acceleration run properly.

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