ERROR:gbm_wrapper.cc(253) Failed to export buffer to dma_buf: No such file or directory

[dathbe]

@sdetweil Ok. When I have some time, I’m going to test an install with 32-bit PiOS.

[sdetweil]

@dathbe 32bit is x11 only . as i recall

[dathbe]

@sdetweil It appears to load labwc by default, but either way it didn’t do anything different – fails to start with start:wayland and multiple phantom errors with start. I guess I just have to close my eyes and not read the logs on startup. Though weird it’s doing it with my Pi 4B, but not my Pi 2B.

[sdetweil]

@dathbe yeh some config setup, i think something in /boot/config. txt

[dathbe]

@sdetweil In case for some reason it’s helpful, I’ve reviewed the contents of /boot/config.txt from my two devices (4B gets errors, 2B does not).

In 2B, not in 4B:

#dtoverlay=vc4-kms-v3d
# see https://forums.raspberrypi.com/viewtopic.php?p=1507622#p1507247
dtoverlay=vc4-fkms-v3d

In 4B, not in 2B:

dtoverlay=vc4-kms-v3d

# Run in 64-bit mode
arm_64bit=1

[cm5]
dtoverlay=dwc2,dr_mode=host