when i istall the leatest linux version on this pc i have now problems with my cards..
What is the "latest linux version" to you?
Which motherboard does your PC have?
Now or no problems?
Which video graphics card(s) do you actually use?
If you want some help, we will need some proper answers first.
FYI, the Raspberry Pi GPU simply has no HEVC decoder built-in, so overclocking the RPi or using a pure 64bit Kodi-application still won't turn your RPi magically into a HEVC player. For proper 1080p/4K HEVC video play you will have to look at S905 based Android boxes for that, or with some more financial input, choose Intel's Braswell / Skylake / Apollo Lake machines, as well as NVidia Shield, or fullblown PC's with Nvidia GTX950/960/1050-1080 or AMD newest APU/GPUs.
FYI, LibreELEC now has its own installer: downloads – LibreELEC
Regarding your 'bug'...
Any chance the target USB drive is faulty, perhaps try a different USB stick.
Or otherwise, try the installer on a different pc/laptop.
Playing HEVC on the RPi2/3 can only be done via software. 720p h.265 is doable, 1080p h.265 is very problematic.
Without any smartctl functionality, I don't think you can.
LibreELEC only has the very basics of features, to keep it as light as possible.
Everything else can be added via addons.
@kaufert:
Please don't mention or discuss anything related to addons/streams considered illegal, such as SuperRepo, by Kodi and thus also by LibreELEC.
FYI, here is some reading material:
The Piracy Box Sellers and Youtube Promoters Are Killing Kodi | Kodi | Open Source Home Theater Software
Warning - Be aware what additional add-ons you install | Kodi | Open Source Home Theater Software
Pirates Ahoy – LibreELEC
Ooh... that part, huh? 
WebGrab is not developed by the LibreELEC team.
Try getting info here: WebGrab+Plus Configurator
My graphic card is an old Radeon
That amount of information will not do.
Apart from that, AMD/ATI graphics for HTPC usage has always been a challenge in the Linux world.
Don't ever consider the Raspberry Pi being a reliable power source. Its own power adapter can have too much on its own plate already. Always use a separate powered USB hub for external drives.
If SSH doesn't work, do the update differently.
Copy the .tar file to a USB stick and use Kodi's File Manager to move/copy it to the .update folder.
You have to enable the view of hidden files and directories for this.
Personally, I would stick to the Windows setup and do a Kodi installation. LibreELEC is focused on the new and upcoming GPU's, and not really up for solving issues with 9+ years old graphics cards. Get a simple Raspberry Pi 3 setup, and you'll even have a better video experience. You will also save plenty of money on your electricity bill.
Other than that, an ATI Radeon HD3450 video card, as well as Nvidia VGA ?!? Do we have to pick one? Disable the onboard video in the BIOS.
No kodi, dmesg, or xrandr logs are supplied... Our hands are tied.
If only OE 5.0.8 or earlier happened to work correctly, and every other single version is not working correctly, perhaps your hardware has a problem with newer Linux kernels.
What specific hardware is this all about? Talking about solutions without even knowing what hardware this is all about, is useless IMO.
I really wanted to love the shield, but side by side comparison between Pch & dune seemed to lack deep color. The Shield almost looked washed out in comparison. Dark scenes were almost unbearable to watch. it didn't even look as good as my cable box. I tried every setting and waited to the last update. But still no change.
Can it be that the 16-235 limited colour range in the Video Output section is still enabled?
For the Shield (Android boxes), there is also SPMC. A Kodi fork by former Kodi-developer Koying.
For 10bit HEVC video, there is also the Wetek Hub and Wetek Play 2 to consider.
Please use the internal pastebin fuction in LibreELEC. That way, you don't have to start cut&pasting, and we can look at the full log, not just the part(s) that you find interesting. 
That tradeoff will always be there. Be it stability, hardware compatibility, picture quality or something else. Comparing 40-60 dollar 'toys' like the Raspberry Pi or Odroid boards to an Nvidia Shield or fullblown PC's will also have their prices as additional factor.
I'm curious which part of the picture quality could be a problem for you, compared to the Dune & Popcorn hour. Nvidia graphics have had the better capabilities for handling video in XBMC/Kodi. I have the Nvidia Shield TV myself, and it recently got another update. One thing it now supports is HDR. Not every device fully supports 10bit video yet. Sometimes 10bit color is decoded down to 8bit. Intel's Apollo Lake GPU has 10bit support, not so sure every Skylake has.
I stlll find x86 devices to have the better stability since they can use proper HDDs/SSDs for storage. SD cards and USB sticks are too vulnerable and slow to me. NAND storage on Odroid or Wetek may be quicker, but I think there is no TRIM-support for that, AFAIK.
As far as remotes go, they are not my field of expertise. I use CEC whenever available, something that a NUC does not offer by default. You'll need an extra USB-CEC adapter for that one.
I have checked the log, but I cant see anything that would explain this behavior.
Why don't you let us be the judge of that? HOW TO:Provide Logfile - LibreELEC
As with scanning videos, you can use the option "Stop scanning" in the retractable side menu on the left.
If that option does not work, then it is a bug.
