KONA HDMI

[mariomuc]

Running mint 19.1, using ffplay and qv4l2 The driver is correctly loaded and /dev/video[0-3] created and listed.

• not all HDMI ports are always active and recognized especially after repuggling a cable. Often a power cycle is needed to recover the situation.

• Is there any method to programmatically reset the card and/or the driver?

• once the driver is loaded it does not unload even if it has not been used. It is reported as busy

[davids635]

We are aware of the HDMI input issues and are working now on improving the input detection of all our HDMI devices. The v4l2 driver is on the list to be updated once all the firmware is ready.

The best way to reset the driver and hardware state is to unload/load the driver.

I have found that pulse audio holds open the Kona ALSA driver which prevents the driver from unloading. You can use pulseaudio --kill to force pulse to close the driver. You must also edit /etc/pulse/client.conf and change "autospawn" to "no" to prevent pulse from restarting immediately. After reloading the v4l2 driver use pulseaudio --start if you require pulse to be running.

[mariomuc]

Thank you for your answer! at 30Hz things go a bit better! but port 3 and 4 are really a pain. At this point I do not trust any more the tech spec and the manual. With the future good firmware, do you know what is the real max resolution supported by port 4? The manual says 2Kp60. All my 4xmonitors are FullHD so they should be well within the specs. Do you know when the update will be available? In fact I am quite in hurry and I am considering returning it and swap with 4 independent devices like the elgato 4K usb. Many thanks

[fxamit]

@davids635 Have you fixed the input detection issue on KONA HDMI?