Comment 12 for bug 1274320

I may have found the reason for my particular crash. Now my system boots normally.

According to the bug report #1006289 at redhat, the bug could come with insmod diskfilter but someone deactivated that mod and still got the error. I don't even have this mod declared. But I noticed openSuse loves to handle everything on reboot, like setting the next OS to load.
My /boot/grub/grubenv contains 2 lines. Basically, save_entry=openSUSE and next_entry=LMDE Cinnamon.
I removed those lines and the error disappeared. /Maybe/ those line instructs grub to write something on the boot partition, which it's perfectly unable to do since it cannot write to LVM.
Anyway, it seems that solving this bug requires to find out why grub tries to write data.