updating LibreELEC Generic from 10 to 11 using the manual update feature in Kodi settings fails if you have NVidia graphics card, as it downloads LibreELEC-Generic.x86_64-10.95.0.img.gz instead of LibreELEC-Generic-legacy.x86_64-10.95.0.img.gz.
this will cause an error upon boot (after the SysLinux message) "Failed to initialize ptp_kvm" and no splash/gui is showing.
luckily the SSH server is running and it can be fixed by uploading the correct image to /storage/.update