It looks like the i915 kernel driver is flooding the log with problems
regarding the backlight and suspending. So it's probably a kernel bug.
** Summary changed:
- laptop screen wont wake from sleep
+ [i915] Dell Precision M4800 screen wont wake from sleep
** Package changed: ubuntu => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Tags added: i915 suspend-resume
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https://bugs.launchpad.net/bugs/2162367
Title:
[i915] Dell Precision M4800 screen wont wake from sleep
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