Sound and Backup Camera

[markwinger]

I found the problem of 100% cpu. My fault. In the openap startup script I added code to reverse the gpio for the camera. I had the following:

DILE=/sys/class/gpio/gpio20/active_low
while [ ! -f $FILE ]
do
echo 1 > /sys/class/gpio/active_low
done
Not only is there a typo (DILE) but the logic is wrong. I changed it to this:

FILE=/sys/class/gpio/gpio20/active_low
while [ ! -f $FILE ]
do
sleep 1
done
echo 1 > /sys/class/gpio/active_low

Now the loop exits properly when OA opens the gpio and I don't see the 100% utilization any longer. But I still have the problem when when the backup camera is turned on, I get the media player stopping and sometimes resuming mutliple time but eventually stopping completely. This is only a minor problem. But each time the audio stops, the video stops as well making the backup camera delayed.

The volume controls appear work but dont change the volume level. Even OA slider volume controls do not change the volume. So far the only way I know of to get it to work again is to restart OA. For now I am disabling backup gpio so I must manually turn on the camera if I need it.

[markwinger]

One more thing. It is not a problem with the file media player. I just tested this. I get the same behavior if I stream something from Androidauto. When the camera is engaged the music stops and starts repeatedly and the volume controls do not work afterwords.

[markwinger]

I just tried flashing a new sdcard and setup everything from scratch and the same problem occurs. So it either OA or some hardware problem. Not sure what else I can test.

[Daniel_BlueWave]

Thanks for the feedback and all the information. We are analyzing the issue and will provide update if needed.

[markwinger]

I noticed more about the problem. I boot the system, then graphical pamixer.
I see 2 playback devices, 0 recording devices, 3 output devices, 2 input devices.

After turning on the reverse camera, turning back of, then return to the os to look at the still open pamixer several devices have disappeared.
I see 0 playback devices, 0 recording, 1 output, 1 input.

If i terminate OA without rebooting, the start OA again, all the devices reappear except I still only see the on input device. The missing input devices is the"USB PnP Sound Device Analog Mono (Cancelled with LADSPA plugin Mutilibacnd eq on US..)

If needed, I can provide other device names but I did not write everything down.

Hope this helps the analysis.

[markwinger]

any progress on this?

[markwinger]

Daniel. In another thread you suggest the use of finder. I tried selecting finder but I only get a black screen. I can't find anything about how to use finder. Is this a possible solution and if so how do I set it up?