Hello fellow Sierra users, maybe someone could help me with a post-installation defect.
The problem occurred immediately after upgrading an existing build form ElCap 10.11.6 to Sierra 10.12.6.
Overall the installation went all fine, no changes to Clover (4244) config, DSDT or set of additional kexts were required.
Except updating to the matching NVDA WebDriver kit and repatching AppleHDA of course.
NvidiaGraphicsFixup is not used, also no GPU injection from clover.
Now if the DP connected monitor ever enters sleep mode it will not wake up any more.
For a few seconds it will leave power saving mode and then return to it with the display staying blank all the time.
As in El Capitan system sleep is completely disabled so this is not related to the whole system waking up, just the display.
The symptom did not occur a single time while running macOS 10.11.
So far I could not find a solution for this problem.
However there seems to be a history of similar issues affecting Maxwell cards and DP connected monitors.
Any suggestions welcome.
Would a switch to a Pascal based NVIDIA GPU probably help to resolve the issue?