Windows 8.1. bug with 7.4m2 doesn't permit connected standby

dawser · 11-28-2013, 10:04 PM

I have been able to reproduce this problem with a new Dell Venue 8 Pro and a Plugable 3000 USB 3.0 docking station. Before installing the Displaylink drivers, connected standby would drain less than 1% of the battery per hour. After I installed the drivers, the Intel GPU would never go to sleep, so battery drain would be over 6% per hour while in sleep mode, basically losing half of the battery during the night, while the tablet sleeps.

Running "powercfg.exe /sleepstudy" shows the Intel GPU always running at 100%, while the rest of the system reaches a low power state.

After uninstalling the Displaylink drivers, the problem disappears. The Intel GPU disappears from the report, and battery drain again becomes normal.

It is very easy to reproduce.

I was on Windows 8.1 32-bit with the latest Displaylink drivers (7.4M2), automatically installed by Windows and verified against the downloadable version number. I haven't had any other Displaylink driver on my system before that. The tablet is two weeks old.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

11-28-2013, 10:04 PM	#6
dawser Junior Member Join Date: Nov 2013 Posts: 2	I have been able to reproduce this problem with a new Dell Venue 8 Pro and a Plugable 3000 USB 3.0 docking station. Before installing the Displaylink drivers, connected standby would drain less than 1% of the battery per hour. After I installed the drivers, the Intel GPU would never go to sleep, so battery drain would be over 6% per hour while in sleep mode, basically losing half of the battery during the night, while the tablet sleeps. Running "powercfg.exe /sleepstudy" shows the Intel GPU always running at 100%, while the rest of the system reaches a low power state. After uninstalling the Displaylink drivers, the problem disappears. The Intel GPU disappears from the report, and battery drain again becomes normal. It is very easy to reproduce. I was on Windows 8.1 32-bit with the latest Displaylink drivers (7.4M2), automatically installed by Windows and verified against the downloadable version number. I haven't had any other Displaylink driver on my system before that. The tablet is two weeks old.