LE's audio pass-through option is not related to your sound card. It's made for HDMI.
Are you sure your audio is resampled? You never leave digital audio transmission, because your sound card isn't a DAC. So I don't see any reason to resample anything.
I have now ordered an HDMI cable, type D to type A, which is recommended there. Maybe this helps...
Make sure that it's an HDMI 2.0 or 2.1 cable, because that's the standard for 4K.
We should close out any other wake-up cause. To do so, add hdmi_ignore_cec=1 to config.txt. You should have no wake-ups with this.
Please post your config.txt.
Activate hdmi_force_hotplug=1.
Deactivate hdmi_enable_4kp60=1.
Have a look at the alsamixer settings.
Add this lines to config.txt:
hdmi_group=1
hdmi_mode=93I mean this menu: Settings -> System -> Input -> Peripherals -> CEC Adapter.
Set Action when switching to another source to None.
Follow the advice of bubblegum57 . It's such a complex topic that trial-and-error is your best choice. We also can't predict the future of Linux kernel drivers.
At the CEC adapter settings set the HDMI signal to "always on". The default setting is to switch HDMI off when your TV uses a different source.
Try this settings at config.txt:
hdmi_ignore_edid=0xa5000080
framebuffer_width=1920
framebuffer_height=1080
hdmi_force_hotplug=1
hdmi_group=1
hdmi_mode=16I currently don't have YT installed. Can you have a look at YT resolution settings? Maybe a high resolution has to be scaled down. Make sure LE and YT are using the same resolution.
Please provide a link to a complete kodi.log. No more text screenshots.
Explain the usage of OSCam.
I never heard about such error, so my first guess is a broken microSD. TTY is a basic service that shouldn't fail on any setup.
PS: At your last thread the screenshot says ttyd starts OK. Is it solved now?
LE wasn't made to do all this. Dual-boot with Raspbian is the way you should go.
The official answer is no. Read here for details.
Depends on the software you want to install. You know that add-ons are the usual way. Actually you don't need to install software for your purpose. You can remotely shutdown a Linux by SSH, google it.
I don't see any relation to LE. If your fear power outages, then better ask one of those prepper boards.