ML boot hangs on EOS-M with manual lens

[Janke]

Header says it all, really:

"ML boot hangs on EOS-M with manual lens"

This happened even when I changed to the Canon 22mm lens. So, I waited until the orange light stopped blinking, then took out the battery.

FIX:
When I start with a non-ML card and the original Canon lens on the camera instead of a C-mount, everything appears normal again, except that 3x movie crop is still on, and size and quality icons are grayed out in photo mode - but can be changed in menus. 3x crop will only disappear when changing movie size; photo quality & size icons will then reappear.

Conclusion: Since I need ML only for 3x movie crop, I can set it with ML and 22mm lens, then change to non-ML card, and continue to have 3x crop. I must not change movie fps - if I do, I need to boot from an ML card and re-set 3x crop.