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I have been using Ubuntu 12.04 LTS very happily for some time now (waiting for 13.04 to come out so I can upgrade), and I ran some updates 15-20 days ago and then I could only run in Unity 2D and GNOME Classic (No Effects).
This stinks, but I can live with it.

However, I ran some more updates yesterday/day before and now Ubuntu is laggy, Supertuxkart especially, and for some reason when I do certain things all of the menus and the what-cha-call-it start bar thingy disappear??? When I hover over where it is it still pops up with the program name and when I click where menu things are the menus come up, but I can't see what I'm clicking on. Is there any way to fix this?

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Probably your problem is related to Unity/graphics card drivers. To get some help you have to provide more info: graphic card model (use lspci | grep VGA); only one graph. card or two (Optimus)?; 32 or 64bit?. Also a screenshot with the glitches you face would help to understand better what is happening. –  Salem Mar 15 '13 at 15:24
Here's lspci | grep VGA --> 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) I believe I have only one card, but I'm not totally sure. 32 bit and I will try to get a screenshot. As for now, I think my system is too old and is no longer supported by Ubuntu...It warned me about upgrading to 12.10..??? Anyways, I am now using LXDE quite happily and it work great! –  RPi Awesomeness Mar 16 '13 at 5:33
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Wiped and installed Ubuntu 13.04. Everything works fine now and I am loving the speed from Ubuntu 13.04! Problem solved!

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