www.makemkv.com

LG C9 here - love it. Not sure if there are any Dolby Vision improvements in this years CX model.

Proprietary Dolby Vision, on the other hand, can stuff it.

This doesn't help your particular problem - but a few months ago I did successfully rip the US Criterion version of M.D. So it may be your disc or drive.

I use an external Samsung SE-506BB/TSBD 6X USB for ripping on Debian, so it should work fine on Ubuntu. I've had it for over a year without problems.

1.8.11 compiled and works fine for me with openssl 1.0.1h-3 from the debian testing repo.

I agree. I think there are randomly generated CD's. 461 worked well for me though. I'd start there for Redbox users. I ripped this stream. Problem is, it doesn't appear that any of the streams have the dts-HD audio track. Anyone know why? Lionsgate studio is pretty well-known for not including loss...

I have liborc 0.4.18-1, so that's a difference between our systems.

Just as a point of reference, 1.8.9 works for me with kernel 3.13.4-1 and libc 2.18-3 on debian. So it might be something else on your system.

Sounds like you might be using Linux because you are using dvdbackup?

For dvds with lots of intentional errors, I use

ddrescue -n -b 2048 /dev/sr0 backup.iso

which works most of the time. If you want to remove copy protection you will need to process the iso file a second time.