I have this problem on MSI Wind U100. This bug stays after blacklisting
uvcvideo module which solves bug #435352.
--
backlight throbbing on login idle
https://bugs.launchpad.net/bugs/439768
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There are these lines in /var/log/kern.log
Oct 21 11:12:57 u100 kernel: [ 57.646966] integrated sync not supported
Oct 21 11:12:57 u100 kernel: [ 57.798464] integrated sync not supported
Oct 21 11:13:10 u100 kernel: [ 71.445304] integrated sync not supported
Maybe they are related to this
