On P1G4, the standard BIOS hides many advanced options. They can be accessed via:
How to boot from USB disk in the BIOS (Boot Menu) - ideapad, Lenovo
Restart the PC and press F12 (Fn+F12) during power-on to access the Boot Menu. What's a BIOS and How Does It Work? - Lenovo
Enter the BIOS (if possible), press F9 to load Setup Defaults, and then press F10 to Save and Exit. Q2: How do I downgrade the BIOS to a previous version? lenovo p1 gen 4 bios
This usually occurs after installing an unsigned operating system kernel, a secondary GPU driver, or performing a major hardware component modification. Enter the BIOS menu (
While in the BIOS, try pressing these keys for advanced menus:
: This is the exit menu, where you choose to Exit Saving Changes , Exit Discarding Changes , or Load Setup Defaults . On P1G4, the standard BIOS hides many advanced options
: This menu is the hub for hardware-level configuration, including:
Lenovo regularly releases firmware updates to patch security vulnerabilities, improve thermal performance, and resolve system bugs. There are three primary ways to update your system. Method 1: Lenovo Vantage (Easiest)
Under Config > USB > Always On USB – set to "Enabled in S0 (Modern Standby)" or disable it entirely. Some P1 Gen 4 units have charging handshake issues with non-Lenovo chargers; try disabling "Battery Charge Protection" temporarily. - Lenovo Enter the BIOS (if possible), press
Before you can tweak settings, you need to know how to get in. The P1 Gen 4 boots very quickly due to its NVMe SSD, so timing is critical.
Navigate to > Advanced options > UEFI Firmware Settings and click Restart . Updating the BIOS/UEFI Firmware An easy guide to BIOS - ThinkPad P1 - Lenovo