Windows 10, high load from WUDFHost.exe Windows Driver Foundation - User-mode Driver

fstx · 01-23-2017, 10:50 AM

I don't use the display connections on my dock at the moment, just the ethernet and usb ports.

When using SysInternals procmon to see what WUDFHost.exe is doing, I see that it repeatedly accesses the registry key HKLM\SOFTWARE\DisplayLink\NivoManager.

AlbanRampon · 01-23-2017, 11:15 AM

Quote:

Originally Posted by fstx

I don't use the display connections on my dock at the moment, just the ethernet and usb ports.

When using SysInternals procmon to see what WUDFHost.exe is doing, I see that it repeatedly accesses the registry key HKLM\SOFTWARE\DisplayLink\NivoManager.

Hello,

If you don't use the video, then a high load would have a different reason. What is high?
Ethernet and audio are also going through the same physical DisplayLink chip.
Also, whether you use a video output or not, the chip is on the USB so Windows will talk to it.

Kind regards,
Alban

fstx · 02-27-2017, 08:36 AM

Quote:

Originally Posted by AlbanRampon

Hello,

If you don't use the video, then a high load would have a different reason. What is high?
Ethernet and audio are also going through the same physical DisplayLink chip.
Also, whether you use a video output or not, the chip is on the USB so Windows will talk to it.

Kind regards,
Alban

High load is anything that spins up the CPU fan. But I was relating behaviour that seems wrong to me. Your forum does not allow me easily include a screenshot, so I just paste some of the events from procmon below. Procmon keeps rolling with events like these,
about 5 loops per second.

10:31:07.7011935 WUDFHost.exe 13160 RegOpenKey HKLM SUCCESS Desired Access: Maximum Allowed, Granted Access: Read
10:31:07.7012609 WUDFHost.exe 13160 RegQueryKey HKLM SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7013444 WUDFHost.exe 13160 RegOpenKey HKLM\Software SUCCESS Desired Access: Read
10:31:07.7014379 WUDFHost.exe 13160 RegCloseKey HKLM SUCCESS
10:31:07.7015207 WUDFHost.exe 13160 RegQueryKey HKLM\SOFTWARE SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7016392 WUDFHost.exe 13160 RegOpenKey HKLM\SOFTWARE\DisplayLink SUCCESS Desired Access: Read
10:31:07.7017298 WUDFHost.exe 13160 RegCloseKey HKLM\SOFTWARE SUCCESS
10:31:07.7018942 WUDFHost.exe 13160 RegQueryKey HKLM\SOFTWARE\DisplayLink SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7020779 WUDFHost.exe 13160 RegOpenKey HKLM\SOFTWARE\DisplayLink\NivoManager NAME NOT FOUND Desired Access: Read
10:31:07.7021925 WUDFHost.exe 13160 RegCloseKey HKLM\SOFTWARE\DisplayLink SUCCESS
10:31:07.7026075 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19 SUCCESS Desired Access: Read/Write
10:31:07.7027246 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19 SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7029168 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\Software SUCCESS Desired Access: Read
10:31:07.7029901 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19 SUCCESS
10:31:07.7030455 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19\SOFTWARE SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7031177 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS Desired Access: Read
10:31:07.7032101 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19\SOFTWARE SUCCESS
10:31:07.7032718 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7035197 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\SOFTWARE\DisplayLink\NivoManager NAME NOT FOUND Desired Access: Read
10:31:07.7036576 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS
10:31:07.7038434 WUDFHost.exe 13160 RegOpenKey HKLM SUCCESS Desired Access: Maximum Allowed, Granted Access: Read
10:31:07.7041241 WUDFHost.exe 13160 RegQueryKey HKLM SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7045469 WUDFHost.exe 13160 RegOpenKey HKLM\Software SUCCESS Desired Access: Read
10:31:07.7047906 WUDFHost.exe 13160 RegCloseKey HKLM SUCCESS
10:31:07.7049175 WUDFHost.exe 13160 RegQueryKey HKLM\SOFTWARE SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7051393 WUDFHost.exe 13160 RegOpenKey HKLM\SOFTWARE\DisplayLink SUCCESS Desired Access: Read
10:31:07.7052162 WUDFHost.exe 13160 RegCloseKey HKLM\SOFTWARE SUCCESS
10:31:07.7052990 WUDFHost.exe 13160 RegQueryKey HKLM\SOFTWARE\DisplayLink SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7055088 WUDFHost.exe 13160 RegOpenKey HKLM\SOFTWARE\DisplayLink\NivoManager NAME NOT FOUND Desired Access: Read
10:31:07.7056492 WUDFHost.exe 13160 RegCloseKey HKLM\SOFTWARE\DisplayLink SUCCESS
10:31:07.7058230 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19 SUCCESS Desired Access: Read/Write
10:31:07.7059278 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19 SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7060480 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\Software SUCCESS Desired Access: Read
10:31:07.7062546 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19 SUCCESS
10:31:07.7063505 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19\SOFTWARE SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7065572 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS Desired Access: Read
10:31:07.7067363 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19\SOFTWARE SUCCESS
10:31:07.7068287 WUDFHost.exe 13160 RegQueryKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS Query: HandleTags, HandleTags: 0x0
10:31:07.7073661 WUDFHost.exe 13160 RegOpenKey HKU\S-1-5-19\SOFTWARE\DisplayLink\NivoManager NAME NOT FOUND Desired Access: Read
10:31:07.7075117 WUDFHost.exe 13160 RegCloseKey HKU\S-1-5-19\SOFTWARE\DisplayLink SUCCESS

fstx · 03-01-2017, 07:22 AM

I installed DisplayLink 8.2 Beta For Windows 8.2 Beta 1.exe, and WUDFHost.exe is still misbehaving.

bjallen13 · 03-06-2017, 10:33 PM

High Memory usage through the DisplayLink Driver. Has there been a fix or update to this issue yet? Thanks!

DirkV71 · 03-08-2017, 06:32 AM

Same issue on a XPS13 with Dell D3100...do someone need some debuging stuff?!

Greetings, Dirk

Domdus · 03-13-2017, 08:28 AM

Hi,

I tested 8.2 Beta 1 - 8.2.1336 for last weeks which had a slightly better performance than versions before. I still applied the fix at the processes priority for WUDFHost.exe, I mentioned earlier here.

Now I found and tried out the 8.2 Beta 2 and it resolves my issues completely.

In detail, it seems there is only one instance of the WUDFHost.exe in the list of processes (not many) and it does not show any high load behavior - no matter what I do in the display link screen.
Lagging is gone is well.

Best Regards

01-23-2017, 10:50 AM	#1
fstx Junior Member Join Date: Jan 2017 Posts: 4	I too have the problem I don't use the display connections on my dock at the moment, just the ethernet and usb ports. When using SysInternals procmon to see what WUDFHost.exe is doing, I see that it repeatedly accesses the registry key HKLM\SOFTWARE\DisplayLink\NivoManager.

03-06-2017, 10:33 PM	#5
bjallen13 Junior Member Join Date: Mar 2017 Posts: 1	Experiencing the same issues. High Memory usage through the DisplayLink Driver. Has there been a fix or update to this issue yet? Thanks!

03-13-2017, 08:28 AM	#7
Domdus Junior Member Join Date: Feb 2017 Posts: 4	8.2 Beta !2! with big change Hi, I tested 8.2 Beta 1 - 8.2.1336 for last weeks which had a slightly better performance than versions before. I still applied the fix at the processes priority for WUDFHost.exe, I mentioned earlier here. Now I found and tried out the 8.2 Beta 2 and it resolves my issues completely. In detail, it seems there is only one instance of the WUDFHost.exe in the list of processes (not many) and it does not show any high load behavior - no matter what I do in the display link screen. Lagging is gone is well. Best Regards

03-01-2017, 07:22 AM	#4
fstx Junior Member Join Date: Jan 2017 Posts: 4	I installed DisplayLink 8.2 Beta For Windows 8.2 Beta 1.exe, and WUDFHost.exe is still misbehaving.

03-08-2017, 06:32 AM	#6
DirkV71 Junior Member Join Date: Mar 2017 Posts: 1	Same issue on a XPS13 with Dell D3100...do someone need some debuging stuff?! Greetings, Dirk