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i have just put ubuntu onto an old Acer 7700GX. it all looks lovely for a few minutes but then the desktop background goes blocky and the text goes a bit crazy. this doesn't seem to affect new windows that i open though.

I guess its a driver thing. any tips?

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The OP resolved the issue by installing Xubuntu

i installed Xubuntu and my machine is now way quicker. I still get the glitch but have only had it once so far.

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