I believe this is a regression in the Pi 5 bootloader. The overlay
pathname must not be longer than 63 characters, otherwise the overlay
isn't loaded. On core with pi-kernel 1047, the resulting pathname of the
vc4-kms-v3d-pi5 overlay is '/piboot/ubuntu/pi-
kernel_1047.snap/overlays/vc4-kms-v3d-pi5.dtbo` which is one character
too long. Ugg.
Can you copy the overlay to vc4-pi5.dtbo and use 'dtoverlay=vc4-pi5' in
config.txt and confirm vc4 is working? Note that this modification
obviously only works on Pi 5.
** Also affects: rpi-eeprom (Ubuntu)
Importance: Undecided
Status: New
** Changed in: canonical-kernel-snaps
Status: New => Invalid
** Changed in: linux-raspi (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/2128161
Title:
pi-kernel VC4-KMS not working with CM5
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