Hi! oreg...@disroot.org dijo [Wed, Jan 06, 2021 at 09:09:09AM +0000]: > > I'm experimenting with a Raspberry Pi 4 Model B and can't seem to get > > V4L to expose a /dev/video0 device when using the standard CSI camera > > module. Raspbian on the same device seems to expose one correctly. I'm > > using the 20200707_raspi_4 image. > I was having similar problems with an early Pi 1, Model B+. The following > exposed a /dev/video0 device for me. Maybe it works for a Pi4 too.
I was very happy to see this message! Still... > Installed raspi_0w image. > Added start_x=1 in /boot/firmware/config.txt > Installed v4l-utils, v4l2ucp, v4l-conf. > Installed a bunch of python stuff... > No joy. > Upgraded system to debian testing (to get the bcm2835_v4l2 module, from the > staging directory). > Reboot. > Changed /boot/firmware/config.txt again, because it was overwritten during > upgrade to testing: start_x=1 ; Also added gpu_mem=128 but not sure if this > is needed. > Reboot > Magic! /dev/video0 now exists. > Haven't captured a picture yet, but this looks promising: > # v4l2-ctl --info No luck yet :-( I tried this on a RPi4, and while /dev/vide0 exists, any attempts to use it ends up with a dead camera grabbing program :-(
