Probably a video driver issue. Closing assumed fixed.
** Changed in: lightdm (Ubuntu)
Status: New => Fix Released
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Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1245024
Title:
display flickers when screen locked
Status in lightdm package in Ubuntu:
Fix Released
Bug description:
lsb_release: Description: Ubuntu 13.10 Release: 13.10
When I upgraded from 13.04 to 13.10, the displays turn off & back on when the
screen is locked. My external monitor is connected via HDMI. The attached 30s
video shows the issue in action. Here's a link to it online also.
https://dl.dropboxusercontent.com/u/3082549/ubuntu/lock-screen-flickers.mp4
I'm not exactly sure what other info to provide, so please let me
know.
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