*** This bug is a duplicate of bug 153374 ***
https://bugs.launchpad.net/bugs/153374
The effect did not disappear; it happens time to time.
I came to a conclusion that this is another manifestation of the bug #153374
** This bug has been marked a duplicate of bug 153374
Wobbly windows
** Attachment added: 2 second video showing the flicker
https://bugs.launchpad.net/bugs/649705/+attachment/1648038/+files/radeon-flicker.mp4
** Attachment added: BootDmesg.txt
https://bugs.launchpad.net/bugs/649705/+attachment/1648039/+files/BootDmesg.txt
** Attachment added:
This effect disappeared when I changed vertical frequency from (default)
60 to 75 Hz in Monitor Preferences.
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Flicker on external monitor (Mobility FireGL V5200)
https://bugs.launchpad.net/bugs/649705
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