Nice to see I'm not alone. I've been posting about this issue and submitted reports to the nvidia bug email address for about 3 months (see my post here
Enabling SLI with any options causes the hang. Your options are:
- use older linux drivers. As you noticed, anything in the 180.x or earlier series will work (up to ~169.x series).
- do not enable SLI on linux.
- run windows. SLI works happily there.
- sell M1730