Whaauw, I think (again) I found a solution. Or should I say I found what has been causing my external display issue since Febr 8th 2024.
First of all my platform is an HP Envy X360 2-in1 Laptop 15-ey0xxx
Productnumer 6F814EA#ABH, configured with 16GB of RAM
Installed OS Windows 11 version 23H2 (Build 22631.3593)
Have installed all available patches through Windows Update, including all optional patches!
My external display is connected through HDMI:
Philips 346E2C (34 inch Wide curved LCD MONITOR)
Internal display of laptop is NOT used/configured (only use external display: display 2).
My challenges: Since febr 8th 2024 my external display is (more or less) randomly setting the display into 'racing mode'. This mode can be changed manually through some knobs on the display (8 different settings) or thgouth the appplication SmartControl (which I downloaded from the Philips website). There was a specific situation in which the challenge reoccured again and again. After starting WSL (Ubuntu) the display always switched back into racing mode! So frustrating. And more over it changed back at random intervals.
Many people reported more or less the same challenge (switching back to racing mode). However no where a solution so far. I got more and more frustrated by this cause it takes me lots of time to readjust the display day after day since Febru 8th 2024.
First I discovered that almost every time that the display got reset an action was reported in the directory: %APPDATA\Local\HP\HP Display Handler\ where a logfile got stored for every day since the challenge started: ie. HP Display Handler.log.20240517.active
Then I started to use procmon from the Sysinternal Suite! And I got to learn the a process accessed the logfile in the directory HP Display Handler. The process: C:\ProgramData\HP\Telemetry\collectors\hp-telemetry-peripheral-collector_ver_3.0.4737034\ProcInfo.exe
OK, Next step now is to rename the directory where the ProcInfo.exe file is stored to a different name. For now: C:\ProgramData\HP\Telemetry\collectors\OLD___hp-telemetry-peripheral-collector_ver_3.0.4737034\ProcInfo.exe
REBOOTED THE SYSTEM AND SO FAR SO GOOD!!!!
I checked the Windows Update History log
ON February 8th 2024 installed: HP Inc. - SoftwareComponent 1.64.3526.0
Guess that this patch has been causing me headaches!!!
OH NO
Not again! On May 22nd installed HP Inc. - SoftwareComponent - 1.66.3762.0 and the problem is back. Directory C:\ProgramData\HP\Telemetry\collectors\hp-telemetry-peripheral-collector_ver_3.0.4737034 is reinstalled. Changed name of directory again!!! Reboot and problem disappeared