Are you sure it is just the backlight that is off? (Does changing its
brightness restore the display?) Can you please attach a drm.debug=6
dmesg from across the suspend & resume?
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1287352
Title:
screen does not wake after suspend always, intel
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