HP Envy 15m-ee0013dx Touchscreen stopped working soon after recent upgrade

[Orvy]

After a recent upgrade  in Windows 11, the touchscreen on my HP Envy All-IN-One notebook computer stopped working.  I can't say that it was the direct result of the upgrade, but there was no other identifiable "event" that had occurred.  I followed - or thought I followed - all of the recommended procedures that the HP gurus offered with no success.  Now, I have going into the EUFI (BIOS replacement) and tested the touch screen.  Mechanically, it's working.  The touchscreen passes the test.  I have also deleted and reinstalled the touchscreen driver in the device manager.  I have also disabled and reenabled the touchscreen in the device manager.  Short of attempting a full version rollback, which I am reluctant to do because I think we are too far "downstream" from that event, I don't know what else to try. 
Now, to set the stage, this HP Envy runs on an AMD Ryzen 5 4500U Processor with Radeon Graphics, 2375 Mhz where the graphics are controlled by the GPU, but not, I don't believe, the touchscreen.  I might be wrong there. 
Has anyone else with an AMD Processor in their HP Envy had their touchscreen quit out of the blue?  Were you able to get the touchscreen working again?  What voodoo did you have to work to make that happen?
Can you help a brother out here?

[banhien]

---

@Orvy wrote:

After a recent upgrade  in Windows 11, the touchscreen on my HP Envy All-IN-One notebook computer stopped working.

---

@Orvy 

Sorry HP Envy 15m-ee0013dx is NOT an AIO machine.

Regards.

[Orvy]

Thanks for pointing out that this HP ENVY is not an AIO machine.  My bad - I made the mistake of assuming that all convertibles were AIO.   My 15m-330013dx is not AIO, but it is a Convertible touchscreen machine with an AMD processor GPU, and the touchscreen did quit working around the time of an upgrade.   Even after trying the recommended repairs, I have not had any luck in getting the touchscreen working again - and I did use it on a regular basis.  
If anyone out there in HP Land has a convertible notebook with an AMD processor - or Intel processor - and you have experienced anything like this - the touchscreen quitting - and you have found the voodoo to make it work, please let me know.  Thanks, in advance!

[banhien]

@Orvy 

Please try the following discussion:

         https://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/HP-laptop-touch-screen-not-working/td...

Regards.

[Orvy · Accepted solution]

SOLUTION FOUND to "Touchscreen Not Working"
On a hunch, I Googled "What registry entries are needed to make the touchscreen work?"
The AI Overview responded with: 

To enable a touchscreen using registry entries, the key location you need to access is usually "HKEY_CURRENT_USER\Software\Microsoft\Wisp\Touch"; the most important entry within this key is often called "TouchGate", where setting its value to "1" typically enables the touchscreen functionality. 

Key points to remember:

• Accessing the registry: Open the Registry Editor by pressing Windows Key + R, typing "regedit", and pressing Enter. Key location: Navigate to "HKEY_CURRENT_USER\Software\Microsoft\Wisp\Touch". "TouchGate" entry: Double-click on the "TouchGate" entry and set its value data to "1" to enable the touchscreen. 
  Important considerations:

  Different device configurations: Depending on your device and Windows version, the exact registry path and entry names might slightly differ. 
  Disabling the touchscreen: To disable the touchscreen, set the "TouchGate" value to "0". Check device manager: Before modifying registry entries, always check if the touchscreen is properly recognized and enabled in the Device Manager. 

Using regedit, I navigated to "HKEY_CURRENT_USER\Software\Microsoft\Wisp\Touch" and set the TouchGate entry value to "1", saved, exited and rebooted.  The Touchscreen now works.  

I do not know how the touchscreen got disabled or "turned off", but I am glad I found this registry entry!