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

[fstx]

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