One ScanDisk Ultra 16GB does not work just with Arch Linux ARM. Ubuntu and Android are working.
The other is a ScanDisk Ultra 32GB is working with Arch Linux ARM and other distros.
Another Problem that I have is that I do not get any display with Arch, other distros are working.
I have a samsung TV 42", on which Ubuntu and Android are working.
Thank you a lot for you help

I LOVE ARCH
