I have exactly the same problem on a Dell e6410 laptop using a brand new 11.04
Install and all updates.
100% consistent.
If I logon using Ubuntu Classic all works fine.
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*** This bug is a duplicate of bug 753971 ***
https://bugs.launchpad.net/bugs/753971
** This bug has been marked a duplicate of bug 753971
Display garbled upon restoring original resolution or connecting external
displays
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** Attachment added: Screenshot taken after I tried using the launcher,
opening the dash and switching between apps.
https://bugs.launchpad.net/bugs/794013/+attachment/2159065/+files/lenovo-x220-dual-monitor.png
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Bugs,
I have the same issue and get some pretty nasty crashes when using an
additional screen.
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https://bugs.launchpad.net/bugs/794013
Title:
When in dual-screen mode desktop is not painted