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Yesterday I was trying to install GTK+ libraries(pango,ATk,glib,gtk+,gobjects-introspection). After I installed them every thing was OK. but today when computer boots up, my desktop changed to default desktop(when first time Linux boots up).Right upper icons include power button, clock , etc disappeared and when I try to change the background nothing change. On top of all, when I start MATLAB, a error message box pops up. I know it's something with OpenGl, because I ran it on command line it's working properly.Even I changed desktop environment and for new environment the problems still exist. what's the problem? Is that GTK? How can I Solve it?

Any Help Appreciated

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Revert the changes you made yesterday.

Open /var/log/apt/history.log and look carefully for the exact packages that you installed. You will see the exact commands that you used. Change install to remove and enter the commands in the reverse order. You should end up with the same installation that you had before.

If your history.log happens to be too new, use the most recent zipped one by executing cd /var/log/apt/; sudo gunzip history.log.1.gz and scrolling down to the end of history.log.1.

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  • Unfortunately , last command history belongs to first time I boot up the system with new condition.For the record, I know approximately what they were. But problem is more than it. It effects Linux settings. most of system settings disabled. I don't think installing GTK+ library effect my computer as it is right now. If it was GTK it must effect the system right after installation. isn't it another thing?
    – muhammed
    May 8, 2017 at 8:37
  • I added a note about what to do if the history.log file is too recent. As for whether the system should be affected rightaway, I have no evidence but I don't suppose so. I think you need at least a restart of lightdm to see the changes.
    – Jos
    May 8, 2017 at 8:44

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