PRL_DISP_SERVICE causing excessive CPU utilization, fast fan speeds, and shortened battery life

Machine is a MacBook Pro, mid 2015 build. 2.8 Ghz i7 processor, 16 GB RAM, 1 TB SSD drive. Obviously, it has the Retina display.
Parallels is 12.1.1 (41491). O/S is Win7, current on patches. I use Belarc Advisor to verify that all 3d party apps are also current.
Virtual Environment: 2 processors, 7456 MB RAM.
Graphics in Virtual Environment: 768 Mb RAM, set to be BEST FOR RETINA DISPLAY. 3d Acceleration is disabled.

What we're seeing: Use of the VM creates spikes in the PRL_DISP_SERVICE, to excessive levels (well over 100% of CPU) on the host, creating elevated temps and extensive cooling fan use... causing short life when on battery. I've reviewed everything I can find on your site, and made adjustments as listed (set CPUs to 2 in VM, disabled 3d acceleration, increased video RAM, uninstalled/reinstalled Parallels Tools), and I still get similar symptoms. These efforts have improved things somewhat, but... battery life is still under 2 hours when using Parallels on what is a less than 6 month old system, with plenty of resources.

Any other suggestions? v/r

 

Please try the following steps:

1.Quit from Parallels Desktop
2. Open Terminal.app and

execute these commands:

cd /Users/username/Library/Logs/CrashReporter

tar czf ~/Desktop/MobileDevice.tgz MobileDevice

mv MobileDevice MobileDevice.old

where username is the name of your Mac user.

3. Open Parallels Desktop and check the issue

 

Please let us know how it works.

 

Sorry, Mac OS on host is 10.12.2; when we attempt to change directory to /Logs, 'No such file or directory'.
No problem getting to /Users, then /Library, but there does not appear to be /Logs under user. ?? Logged into terminal as SU.
v/r

 

Looks like the issue requires a deeper investigation. Could you please generate a Problem Report ID and submit it here?

 

Report submitted just now; report #141705301. Thanks for the follow up!