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Old 10-25-2016, 01:17 PM   #1
luuk
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Default Windows 10, high load from WUDFHost.exe Windows Driver Foundation - User-mode Driver

Anyone knows how I can fix this? The process WUDFHost.exe Windows Driver Foundation - User-mode Driver cause a very high CPU load.

When this happens the screen works buggie / stays behind / not rendering correctly. Or only render parts.

System details:

Dell Inc. XPS 13 9350
Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz, 2592 MHz, 2 core('s), 4 logische processor(s)
M​emory:16GB
​Microsoft Windows 10 Pro​ , 10.0.14393 Build 14393

2x Dell USB3.0 dock D3100
Screen Resolution : 2560 X 1440

Displaylink manager: 8.0.762.0


Thanks for the support
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Old 10-25-2016, 01:29 PM   #2
luuk
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I think the problem is caused by the update of windows. And the way how the displaylink software integrate with it.
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Old 10-26-2016, 02:29 PM   #3
AlbanRampon
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Quote:
Originally Posted by luuk View Post
I think the problem is caused by the update of windows. And the way how the displaylink software integrate with it.
Hello,
I'm afraid I don't understand this, can you explain what you mean?
Kind regards,
Alban
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Old 10-27-2016, 09:19 AM   #4
luuk
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Quote:
Originally Posted by AlbanRampon View Post
Hello,
I'm afraid I don't understand this, can you explain what you mean?
Kind regards,
Alban
Before the update of windows, [Anniversary Update] I mean.
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Old 10-31-2016, 03:06 PM   #5
luuk
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Any clue what it can be?
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Old 11-01-2016, 05:38 AM   #6
perlamoldovei
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Default Still mouse lag was not removed

I've been expecting for more than one month the update of displaylink driver but the horrible mouse lag was not solved. Before W10 Anniversary update everything worked smooth. I have 3 computers with 2 monitors (1 on video card and 1 on usb - Philips C221S) and one with 3 usb monitors only.
Before W10 Anniversary update all computers worked fine without any mouse lag no matter what i did on the computers.
After W10 Anniversary update the computers with 2 monitors started having an annoying mouse lag on the USB Monitor especially when the computer was doing something, i.e. loading a webpage. I noticed that there is a high cpu load on Windows Driver Foundation when that happened (USB monitor activated and kind of graphic refresh of screen no matter the monitor). Things didn't improve after the last release (25 October) of the DislayLink driver.

Now it is impossible to use two of the computers with 2 monitors as they have a dual core processor. I still have to mention that the computer with 3 usb monitors (and no vga monitor) works flawlessly.

Is there any chance that this issue is solved? I invested a lot in these monitors and tehnically i cannot use them.
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Old 11-01-2016, 11:15 AM   #7
AlbanRampon
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Quote:
Originally Posted by luuk View Post
Any clue what it can be?
Hello,
When you do a Print Screen, do you see the corruption?
If so, then this is a bug we've reported to Microsoft already and they are working on it.
How many displays in total are working? We've noticed you need 3+ for the issue to be obvious and that's why this is reported by DisplayLink users... because we make it easy to add that many displays on machines.
Regards,
Alban
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Old 03-31-2017, 01:31 PM   #8
AlbanRampon
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Hello,

Thank you for those who have tested 8.2 Beta 2 and sent their feedback.
8.2 M0 has now been delivered and includes some performance improvements.

A team is allocated full time to looking at the CPU usage in some particular use cases based on your reports.
Some applications are not really good citizens and send us constant full screen updates when they show static content (like the inbox Photos application, or Spotify). Improving the behaviour for these suboptimal applications is a longer term feature.
The team has also identified particular situations with video playback where we can save some calculations and therefore lighten the load significantly.

We have had to build dedicated test rigs and code to make sure we can make reliable measurements instead of relying on subjective impressions.
A second team will join the effort when they have finished current commitments.

We keep putting significant money and development resource into delivering incremental improvements.

Kind regards,
Alban
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Old 04-03-2017, 06:47 PM   #9
tbone
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Alban, thanks for your and your team's efforts on delivering this update and working with your users. I just installed it and although I have not yet put the computer through its normal paces, I can "hear" some improvement... meaning the fan is not spinning up as much due to high CPU use.
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Old 04-05-2017, 06:31 PM   #10
tuath
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Default Logging

Is there a way to log which applications are not being good citizens and doing full screen refreshes ? maybe we can force their owners to modify.

Also, since the Indirect Display Driver stuff, how do we force Microsoft to take action on performance issues ? i.e. i think i understood that OpenGL isn`t accelerated anymore because Indirect drivers doesn`t yet have OpenGL passthrough...

Thanks, Erik.
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