This is the only ad that I saw. It came up on a google search for Linux E2, DVB-S2, 4K, 4:2:2. I didn't see any disclaimers regarding 4:2:2 decoding:
Note: Now accepting pre-orders for $249 USD (regular price $299 USD). Item will ship August 15th, 2017.
FEATURES
4K (UHD) resolution
Front panel...