I have a Lenovo Ideapad 100-15IBY 80MJ with the same problem, can't do changes in BIOS and can't boot from other media. I have tried switching kernels (4.14.9, 4.14.10 and 4.15-rc6) but it doesn't help.
I have a Lenovo Ideapad 100-15IBY 80MJ with the same problem, can't do changes in BIOS and can't boot from other media. I have tried switching kernels (4.14.9, 4.14.10 and 4.15-rc6) but it doesn't help.