sometimes, the display will freeze momentarily (50 - 100ms pause) while automatically changing the brightness. this was tracked down to an issue in xbacklight + intel video cards ( see xbacklight commit)
upgrading to latest version of xbacklight solves the issue, but newest xbacklight in ubuntu repositories is still 1.2 (from 2 years ago).
sometimes, the display will freeze momentarily (50 - 100ms pause) while automatically changing the brightness. this was tracked down to an issue in xbacklight + intel video cards ( see xbacklight commit)
upgrading to latest version of xbacklight solves the issue, but newest xbacklight in ubuntu repositories is still 1.2 (from 2 years ago).