HP Spectre - Laptop hangs after wake from sleep - no display

[johnyg07]

CMOS reset did not resolve the issue.
The system appear to go to sleep but does not wake up from that, I had to hard reset it.
This time i did not see sleep failure logs so far.
I don't see any logs for call to _PTS or _WAK methods either, only calls to _INI method when the system boot.

Cannot translate ACPI object log entry was there in previous install also so that is a non- issue.

 

[johnyg07]

Turns out BIOS downgrade was allowed to immediate previous version. I installed the F39 version, repatched the DSDT and sleep worked. Thank you all who read the thread and helped investigate this issue. This was tough one.