BIOS Menu

───────────────────────────────────────────────
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

# verify partitions
gparted

# 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

• Fedora 34 on Lenovo Legion 5 PRO 16ACH6H
• Ubuntu brightness control of Legion 5 pro
• Restore Grub Boot Loader from Windows
• Lenovo Legion 5 PRO 16ACH6H Support
• Battery charging stuck at 60%
• American Megatrends BIOS
• Ubuntu on the Legion 5 Pro
• Lenovo Legion 5Pro BIOS
• GRUB vs GRUB 2

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@2013~2021                Chorke Inc.

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