*** This bug is a duplicate of bug 415023 ***
https://bugs.launchpad.net/bugs/415023
I have this problem both on the log in screen and after log in to
desktop. I can stop it flickering, and make the brightness widget
disappear, by pressing the "right click" mouse pad bar (after the
desktop is fully up) and holding it for 5-10 seconds. I've no idea why
it works, but it does. It is then necessary to delete the new empty
folder created by the right click. Hope it works for others. :)
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screen brightness flickers at login screen
https://bugs.launchpad.net/bugs/423873
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