Public bug reported:
I am using the 20140213 daily build of Xubuntu 14.04 x64 on a Lenovo
Thinkpad x230. If I switch to using an external monitor and then switch
back to using the built-in display, the brightness controls no longer
work. The applet shows the brightness value changing, but the screen's
brightness does not change. The only way I have found to fix it is
logging out and back in or rebooting.
Description: Ubuntu Trusty Tahr (development branch)
Release: 14.04
xfdesktop4: 4.11.2-1ubuntu1
** Affects: xfdesktop4 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1280227
Title:
Brightness controls no longer work after toggling monitor
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