vc_dispmanx_display_open error

[thescienceofnerds]

After making a build and then trying to run said build, this error occurs:

vc_dispmanx_display_open failed! Make sure to have hdmi_force_hotplug=1 setting in /boot/config.txt

I did as it said and added the line to the config.txt, rebooted the pi and got the same error.

please help :)

[remsky]

Same issue, on Raspberry Pi Zero WH. Also tried adding the hdmi_group, hdmi_mode, hdmi_cvt settings but no luck either

[remsky]

I take it back, I did a full reboot after modifying my config instead of just on an off again.

I also changed the resolution to a multiple of my displays (480 480) and commented out the following lines before doing so. Something worked

dtoverlay=vc4-kms-v3d
max_framebuffers=2

[DannieDarko]

V3D driver seems to be the issue and
#dtoverlay=vc4-kms-v3d
does the trick