Use a bootable USB stick with an OS specialized for device checking. Your HTPC can probably boot from stick.
GParted LIve can check and repair partitions. Especially it can leave bad blocks out when reformatting a partition.
Be sure to make an LE backup before you try to repair anything.
Evarything fine now, but didn't really understand why the german language was disabled in my case...
Checking the device for errors still can't hurt. If you haven't changed the settings, there must be a different cause for the error.
I still can't see a graphics problem resulting into bad blocks on a storage problem. But anything is possible, I guess.
When a texture has partially been stored in bad blocks, then the texture can't be loaded by Kodi.
Isn't 9.1.X the only version that runs on the Pi4?
Yes. I'm using an RPi 3B+, and had the safe mode error a couple of times with LE 9.1.x.
That's why I suggest 9.0.x for all RPi lower than version 4.
It's right, because they made an upload error before.
LE 9.1.x was wrongly sorted into the 9.0.x branch. Now it's on a new branch, which means 9.0.2 is the latest on the 9.0.x branch.
My suggestion is to "update" to 9.0.2, because 9.1.x has known errors (occasionally goes into safe mode without a cause).
So... How are incorrect internal memory pointers & segmentation faults exactly causing broken (external) storage devices? It sounds like a big leap to me.
schlucke and me are referencing to this part of the log file:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000b0d8f0 in CGLTexture::DestroyTextureObject() ()My interpretation is that a graphical element (CGL texture) of LE can't be loaded. Because it was loaded many times before, I came to the conclusion above.
Those errors are typical for broken storage devices. Check your LE installation device (bad blocks etc.).
It's not what you're asking for, but an HDMI audio extractor can deliver analogue audio, too. It's a pretty universal tool, and you'll avoid any driver issues.
mmh can not find the artwork disable function
First entry at the Artwork menu should be about "fanart". Disable that.
Also at standard skin Estuary the same problem
GRAB FANART ERROR
OK, then disable "fan art" at Settings -> Interface -> Skin -> Configure skin... -> Artwork.
Then check the content of "Peripherals" again.
Please use the DEFAULT SKIN, and try again. 
at LE9 i use Aeon nox silvo (standard supported bij LE9)
It's maybe part of the official repo, but that doesn't mean it fully supports all LE standards. Most add-ons are made by people, who are not developers of the LE core.
Use the default skin for testing.
Use the latest stable version of LE, which is 9.0.2 currently. LE 9.1.x has known errors, like going into safe mode without a cause.
also with a new install, at Settings -> System -> Input -> Peripherals is still empty
i also now have a GRAB FANART ERROR, at start up
Do you use the default skin? Please always do so for testing.
Because some custom skins let menu entries disappear.
mmhh also a fresh new install is not fixing my issue
Sorry to hear that.
Do you see the CEC adapter settings now? They must be somewhere.
I'm asking, because you maybe do an undesired repeating when you hit the power button.
The CEC adapter settings can fix that, because timing for repeating etc. is adjustable there.
i checked that section peripherals, but it is empty on my system, so i think i have no CEC adaptor installed
Then I suggest a fresh installation (LE download page). Maybe something went wrong as CEC adapter switched from add-on status to system-part status (LE8 -> LE9).
where can i find the "CEC adapter add-on completely"?
I was wrong, it's not an add-on anymore.
You can deactivate the CEC adapter at Settings -> System -> Input -> Peripherals -> CEC Adapter -> Enabled.
Be sure that your remote control doesn't send signals over IR (if you have an IR receiver on your PC) and CEC.
Thanks for testing. Then the <power> tag is wrong, and you have to find the right key ID number, like you already did for the "back" button.
PS: One little thing you could still try: Disable the CEC adapter add-on completely. The power button press should have no effect then. Just to be sure your PC is not responding to other signals when pressing the button.
