Thanks for the advice. I installed 4.7.0-040700.201608021801 and it
doesn't make any difference.
I did discover, though, that with either kernel, if you give
intel_backlight a brightness of 0, the backlight switches off
completely.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1608745
Title:
Backlight uncontrollable on Samsung NP740UE3 since upgrade to Xenial
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