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Procedure:
1. Boot up the laptop
2. Login
3. Plug in the external monitor
4. Open "Monitor Preferences"
5. Change laptop's resolution, from 1366x768 -> 640x480, change refresh rate.
6. Press "Apply"
Expect:
Monitor displays normally corresponding to new resolution and refresh rate.
Happened:
Abnormal garbage displays on the laptop screen, please refer to attached
screenshot.
Release version:
Ubuntu 12.10
Frequency:
Always
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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Laptop monitor display incorrectly after plug in an external monitor
https://bugs.launchpad.net/bugs/1197437
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