I only have N2 !
Also Keyboard is mistyping and HDTV HDMI loses sync when logout to greeter requiring numerous switch back and forth between inputs.
I have time in seconds on panel bar to show if hung or not responding.
I can recover without rebooting by using F1 command line to restart lightdm.
Also would login ssh to do same while watching display for ominous behavior.
I am using Chromium-browser (because of sync for fast recovery after re-flash) in XFCE4 when it happens.
I just switched to Ubuntu with Wayland to see if it has these artifacts.
Definitely usable but not reliable.
I will begin to explore sequence from boot to headphone jack selected as output in panel mixer this week.
I assume the DTB is incorrect for ALSA sub system for all three outputs as it was in 18.04 lts with mate.
I copied the 18.04 mate img to mount and explore files to compare.
First indication is dmesg with (-22) Invalid arguments.
Pulse Audio seems happy so assume the ALSA is culprit.[10398.064731] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC: can't set i2s-hifi hw params: -22
[10398.064741] axg-sound-card sound: ASoC: PRE_PMU: be.dai-link-4-playback event failed: -22
[10398.089802] hdmi-audio-codec hdmi-audio-codec.4.auto: Not able to map channels to speakers (-22)
[10398.089817] hdmi-audio-codec hdmi-audio-codec.4.auto: ASoC: can't set i2s-hifi hw params: -22
[10398.089826] axg-sound-card sound: ASoC: PRE_PMU: be.dai-link-4-playback event failed: -22
I can see and select TB 450 headphones.
Code: Select all
$ systemctl --user status pulseaudio ● pulseaudio.service - Sound Service Loaded: loaded (/usr/lib/systemd/user/pulseaudio.service; enabled; vendor preset: enabled) Active: active (running) since Sat 2020-05-09 17:18:19 EDT; 22min ago TriggeredBy: ● pulseaudio.socket Main PID: 33014 (pulseaudio) CGroup: /firstname.lastname@example.org/pulseaudio.service └─33014 /usr/bin/pulseaudio --daemonize=no --log-target=journal May 09 17:18:18 cooldroidn2 systemd: Starting Sound Service... May 09 17:18:19 cooldroidn2 systemd: Started Sound Service.