The bug is fixed.Thank you very much for your help!
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-fixed-upstream
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Public bug reported:
Problems with Stand-by/sleep mode after upgrading to 16.04. Driver
ventilation still running, but the screen stays black. No reaction at
all.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Unam