I had a 3B+ that had been running the 3/20 ver of Patchbox displaying HDMI out no problem. I wanted to upgrade to the Pi4 so that means an adapter of course, but now I cannot get video. I initially just ran the image I had working on the 3B+ but after not getting anything out of that, I tried a fresh image and could see video during the installation and after it had finished I got a command line, but a restart meant no video, not even the rainbow splash. The same hardware with a raspian image displays video, and I did find the config file on the image that has video settings, but can’t seem to find the right combination there. thanks for any help!
Which was the version of the fresh image you used? OS images built before the new versions of Pi appeared won’t work on latest models without first getting all the latest apt-get updates, as well as kernel upgrade to latest version.
New version was what I think is the latest, Dec. 2020…?
Try booting the Patchbox OS image on an older Pi and run these commands:
sudo apt update
sudo apt install raspberrypi-kernel
sudo apt upgrade
Then try to boot it on Pi 4 again.
thank you for your reply, ran those commands successfully but there was no change.
I tried those commands on a new install on a Pi3 with a HiFiBerry DAC+ and got this:
patch@patchbox:~ $ sudo systemctl status jack
● jack.service - JACK Server
Loaded: loaded (/lib/systemd/system/jack.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2021-09-05 00:08:22 PDT; 4s ago
Process: 6118 ExecStart=/etc/jackdrc (code=exited, status=255/EXCEPTION)
Main PID: 6118 (code=exited, status=255/EXCEPTION)
Sep 05 00:08:21 patchbox jackdrc[6118]: ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
Sep 05 00:08:21 patchbox jackdrc[6118]: configuring for 48000Hz, period = 128 frames (2.7 ms), buffer = 2 periods
Sep 05 00:08:21 patchbox jackdrc[6118]: ALSA: final selected sample format for playback: 16bit little-endian
Sep 05 00:08:21 patchbox jackdrc[6118]: ALSA: cannot set period size to 128 frames for playback
Sep 05 00:08:21 patchbox jackdrc[6118]: ALSA: cannot configure playback channel
Sep 05 00:08:21 patchbox jackdrc[6118]: Cannot initialize driver
Sep 05 00:08:21 patchbox jackdrc[6118]: JackServer::Open failed with -1
Sep 05 00:08:22 patchbox jackdrc[6118]: Failed to open server
Sep 05 00:08:22 patchbox systemd[1]: jack.service: Main process exited, code=exited, status=255/EXCEPTION
Sep 05 00:08:22 patchbox systemd[1]: jack.service: Failed with result ‘exit-code’.
patch@patchbox:~ $
This looks like an issue either with your audio card configuration, or Jack server configuration.