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Old 03-21-2017, 09:01 PM   #63
jeremy
Junior Member
 
Join Date: Feb 2017
Posts: 9
Default Also happens with Dell D1000 Dock on Dell Systems

We are seeing this issue across our organization. We have Latitude E5570 with Dell D1000 docks. We use these docks for two monitors, USB inputs, and Ethernet. Our display cables are Display Port and (can be any of the following) HDMI-to-DVI/VGA-to-VGA/HDMI-to-HDMI. We may also use audio if the users have the auxiliary speakers attached.

Please let me know if there's anything I can do to help or any additional details you need about our environment.

Here's my system info:
1. Windows 10 Build Number (available from System_Details.txt of our Customer Support Tool). Home/Pro/Enterprise is not needed.

OS Build: 10.0.14393.0

2. Enumerate each display, its resolution and if it is connected to the graphics card or a USB adapter (available from System_Details.txt as well).

DELL P2214H Manufacturer: DEL ProductCode: A097 Serial: KW14V478528L Built: 28/2014
DELL P2214H Manufacturer: DEL ProductCode: A098 Serial: KW14V4CF27KL Built: 51/2014

3. The CPU ***full*** name including the numbers after iX (available from System_Details.txt as well). Generation is more important to understand the architecture rather than if it is an i3 or i7.

Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz

4. The GPU details (available from System_Details.txt as well).

Graphics: DisplayLink USB Device (DisplayLink)
Graphics Driver: 8.0.762.0 Dated 2016/08/17
Graphics: DisplayLink USB Device (DisplayLink)
Graphics Driver: 8.0.762.0 Dated 2016/08/17
Graphics: Intel(R) HD Graphics 520 (Intel Corporation)
Graphics Driver: 21.20.16.4574 Dated 2016/12/23

5. What you include in your CPU usage (which processes: overall, WUDF, DWM...). Note: I really need WUDF more than the rest as DWM is a Windows process).

WUDFHost.exe @ 30% when active. Using Skype, jumps to 70%.
Desktop Window Manager stays between .7% and 3%.

6. The value of CPU being used.

50-70% with normal usage.

7. What happens on ALL indirect displays (indirect = through USB). If you have Task Manager on an indirect display, then it is NOT idling as content changes!!! This is really one of the most important point. Here are some examples:
7a. Content fully static: nothing changes at all, and I mean nothing, not the clock, not the mouse pointer.


WUDF idles between .2% and 3%.

7b. Some little area changes: like for instance you only have some numbers on the clock or the numbers in Task Manager.

WUDF idles the same as 7a.

7c. Only the mouse pointer across indirect displays. (if you do this, please do NOT use the mouse trail accessibility feature or this is the same use case as 7b).

WUDF is active 26-33%.

7d. Moving a window. Indicate an idea of the size of the window... I mean moving a 10x10 pixels windows is obviously fundamentally different to moving a 4kx4k one.

WUDF is active 38-46% moving a Chrome window half the size of one of my monitors. Oddly enough, Chrome usage spikes.
WUDF is active 38-42% moving a Skype for Business 2016 window 1/3 the size of one of my monitors. Even more odd, the input lag from moving the single window is several seconds, whereas the Chrome window had very little.

7e. Playing video on VLC

WUDF is active 30-45%.

7f. Playing video on a browser (and the value is constant across browsers). Our driver CANNOT differentiate which browser is playing.

WUDF is active from 28-40%.

7g. Game, full screen or windowed? Games do NOT use the same as video playback.

No games are installed on our PCs.

8. Which version of DisplayLink driver you are running as, like Windows builds, they don't all have the same features. (available from System_Details.txt as well).

DisplayLink Graphics Driver (8.0.778.0) on 2017/03/20 Status is Installed
This is the driver available from Dell's site for the D1000 USB docking station. Will be attempting the same tests with the latest drivers as well after seeing this thread.
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