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Thank you for the clarification. I mistakenly thought that the firmware version compatibility of the BC-12D2HT was the same as the BW-16D1HT. I also have a BW-16D1HT but since it came with firmware 3.0.3 I thought I'd try a different model from another vendor in hopes that it would come with older f...

I just bought an ASUS BC-12D2HT with firmware revision 3.01. My understanding is that 3.0 and 3.01 should work fine. I am, however, unable to open any 4k UHD discs. MakeMkv reports "no disc inserted". I'm using MakeMKV v1.14.1 linux(x64-release) Here are the details as reported by MakeMKV....