Hi, All!
Strange problem with ubuntu and mint on MSI B85-G41 motherboard.
PC works some weeks without any fail, and linux becomes broken (some system
files impossible to load). In windows it will boot infinitely blinking with hdd
led and pulsing window logo. Did You face with such fault? In efi boot menu I
see 2 ubuntu strings and 1 os string. All start same grub2. If I delete this
gash, it reproduced.

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