This is absolutely still an issue in the latest versions of Ubuntu.
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https://bugs.launchpad.net/bugs/487720
Title:
Restore fails with "Invalid data - SHA1 hash mismatch"
To manage
Solution in #8 worked for me as well. Upgraded to 15.10 and had the
garbled screen. The config file fixed it.
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https://bugs.launchpad.net/bugs/1507255
Title:
Garbled graphics in Wily