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Control + Alter + Delete » Restart
Esc (Continuous Press) » Until Boot Menu
cat /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode
Result: 0 = disabled, 1= enabled
Repair UEFI Grub
# mount ubuntu partition
sudo mount /dev/nvme0n1p4 /mnt
for i in /sys /proc /run /dev;\
do sudo mount --bind "$i" "/mnt$i"; done
# mount uefi partition
sudo mount /dev/nvme0n1p1 /mnt/boot/efi
sudo chroot /mnt
update-grub && grub-install /dev/nvme0n1
update-grub && exit
sudo reboot
References
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@2013~2021 Chorke Inc.
