Second Acer monitor X183H native 1366 x 768 HDMI-to-VGA adapters "Input Not Supported" (*First AcerG195W works great)

Question

#Raspberry Pi w/ latest raspbian (RaspberryOS) (which I have connected as a desktop computer) https://www.raspberrypi.org/products/raspberry-pi-4-model-b/specifications/?resellerType=home
#Connection type https://www.amazon.ca/UNSOEN-Adapter-Converter-Portable-Connector/dp/B07XGQBCH5
#Monitor 1 https://www.cnet.com/products/acer-g195w-abd-lcd-monitor-19/
#Monitor 2 https://www.cnet.com/products/acer-x183hb-lcd-monitor-18-5/

#The problem
I am aware that something doesn't seem to like the Native Resolution: 1366 x 768 at 75 Hz for the X183H (Monitor 2), I have not been able to correct the issue of the "Input Not Supported" bouncing around Monitor 2. I can look past this annoying little box and view my second monitor no problem but was wondering if there might be a way to easily disable this (prob not). Since I do enjoy the current configuration: HDMI-1 1440x900 @59.9hz / HDMI-2 1920x1080 @60hz (and all other currently available options for HDMI-2 causes my screen to look absolutely horrendous because of 1366x768 issue), further along I have disabled Overscan for the output, so for HDMI-2 the monitor accepts and displays at the above settings but is under the impression it does not.

#Attempted Fixes

sudo nano /boot/config.txt
Locate and edit: #uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
hdmi_mode=87
hdmi_cvt=1360 768 60
Ctrl+x ..Save ../boot/config.txt ..enter

Reboot: but this applies the settings to HDMI-1 when I only want for HDMI-2 (and HDMI-2 remains "broke")

#Enabled settings in config.txt

Enable audio (loads snd_bcm2835) dtparam=audio=on [pi4] #Enable DRM VC4 V3D driver on top of the dispmanx display stack dtoverlay=vc4-fkms-v3d max_framebuffers=2 [all] #dtoverlay=vc4-fkms-v3d #NOOBS Auto-generated Settings: start_x=1 gpu_mem=128

Thank you for any insight you might have in reference to my issue.

Answer 1

SOLVED : Adding these some lines to /boot/config.txt https://www.raspberrypi.org/documentation/configuration/config-txt/conditional.md

Look for: The

[HDMI:*] 

filter which works for Pi 4 only.

Use group=1 (CEA) for televisions or group=2 (DMT) for monitors.

Select mode from list (using the output from a tvservice -v -m DMT command)

#mode 47: 1440x900 @ 60Hz 16:10, clock:106MHz progressive
hdmi_group:0=2
hdmi_mode:0=47 

#mode 85: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
hdmi_group:1=2
hdmi_mode:1=85

functional although not ideal.

Avoid using 1366x768 as that may not work with your TV or monitor.