This is primary for information if someone else has this problem.
It looks like after updating from v10.4.1 to v10.4.2 the legacy Raspi-Camera does not work anymore (Pi Zero 2W).
The Log shows this:
[ 25.679081] bcm2835_mmal_vchiq: buffer_to_host_work_cb: ctx: 00000000601d07eb, vchiq_bulk_receive failed -22
[ 25.682573] bcm2835_mmal_vchiq: buffer_to_host_work_cb: ctx: 0000000021197984, vchiq_bulk_receive failed -22
[ 25.716793] bcm2835_mmal_vchiq: buffer_to_host_work_cb: ctx: 000000006930c017, vchiq_bulk_receive failed -22
[ 25.747769] bcm2835_mmal_vchiq: buffer_to_host_work_cb: ctx: 000000001ce54d90, vchiq_bulk_receive failed -22
[ 109.224560] bcm2835_mmal_vchiq: timed out waiting for sync completion
[ 110.248593] bcm2835_v4l2-0: stop_streaming: Timeout waiting for buffers to be returned - 4 outstanding
[ 113.320567] bcm2835_mmal_vchiq: timed out waiting for sync completion
[ 113.320726] bcm2835_v4l2-0: Failed disabling camera, ret -62
[ 113.320815] bcm2835_v4l2-0: Failed to disable camera
And then a kernel dump.
I think this is not a dietpi related issue, i think it was caused by an update to the Debian packages. But which one?
Is there a way to “downgrade”?
I still have a working version which i can get a backup and then “try and error” to find which package causes this problem. But it will took some time. 