So I am having the same issue, usually 14-25% CPU usage, but when Skype for Business or WebEx is displaying, it goes to 100% and doesn't seem to kick off throttling either. I can use Throttlestop to force the CPU to max, but even then it doesn't seem to completely fix it, the rest of the system is very very slow, instead of unusable.
1. OS Build Info
OS: Microsoft Windows 10 Pro (x64-based PC), No Service Pack, English
OS Build: 10.0.14393.0 (Debug = False)
OS Build Label: 14393.rs1_release.161220-1747
2. Monitors Connected:
Manufacturer: LEN ProductCode: 40D3 Serial: 0 Built: 1/2012
DELL E2211H Manufacturer: DEL ProductCode: A072 Serial: 7N01218P0U0M Built: 34/2011
DELL E2211H Manufacturer: DEL ProductCode: A072 Serial: 19G4H13T1U8L Built: 14/2011
3. CPU
Intel(R) Core(TM) i7-3667U CPU @ 2.00GHz - Running at 2.5 Ghz on all cores via Throttlestop
4. GPU Details
Graphics: DisplayLink USB Device (DisplayLink)
Graphics Driver: 8.1.843.0 Dated 2016/12/01
Graphics: DisplayLink USB Device (DisplayLink)
Graphics Driver: 8.1.843.0 Dated 2016/12/01
Graphics: Intel(R) HD Graphics 4000 (Intel Corporation)
Graphics Driver: 10.18.10.4425 Dated 2016/04/04
5. CPU Usages
WUDF @ 14-25% when just browsers, spreadsheets and what not. With Skype For Business and WebEx presentations, it hits 75-100%, typically 100% This is with no video camera on, just screen sharing from others.
Windows Desktop Manager stays at 0.5% to 3% CPU usage.
6. Total CPU Usage
25-30 when not using Skype For business or WebEx, 100% when using them
7. Analysis
7a: When completely static with just the task manager open, WUDF idles at around 4%-15%
7b: Same as 7a - uses around 4-15% CPU with the Windows clock open.
7c: When just moving the mouse around the displays WUDF uses around 22-23% of the CPU.
7d: When moving a window around WUDF usage goes up to around 22-23% of the CPU.
7e: VLC player playing a 1080p video: 6-12%% WUDF CPU Usage.
7f: Full screen video on:
- Google Chrome = 10-15% WUDF CPU Usage. Appears to be throttled by Chrome CPU as well
- Full screen video on Microsoft Edge = 105-15% WUDF CPU usage.
Same video used on all browsers.
7g: Installed Stellaris off of steam. During loading screen it took 4-6% cpu, once in game at the start screen, where there is animation, it was taking 17-40% CPU.
8. Display Link Driver Installed
DisplayLink Graphics Driver 8.1.843.0 Dated 2016/12/01
Added a WPA screenshot, looks like the Displaylink driver is accessing Direct X 11, where the CPU draw is coming from
