如何在Ubuntu中禁用Fast Boot？HP 15-ac028TX双系统黑屏故障求助

Hey there, let’s tackle your HP 15-ac028TX dual-boot (Windows 10 + Ubuntu 16.04) issues step by step. First, that random black screen with no display (even though the laptop powers on) that comes and goes is frustrating, but let’s start with troubleshooting that, then cover disabling Fast Boot in Ubuntu.

Your symptoms—black screen after a sudden Windows shutdown, battery drain trick not working, then spontaneous recovery followed by recurrence—point strongly to power management conflicts between the two systems, or BIOS-level settings clashing. Here’s what to try:

• Check BIOS/UEFI Power Settings
  Boot up and hit F10 to enter your HP BIOS. Head to the Power Management section:
  • Disable Fast Boot if it’s enabled (this keeps hardware in a semi-active state that can confuse dual-boot setups).
  • Disable Secure Boot too—this often causes compatibility issues with Linux distros like Ubuntu. Save changes and reboot to test.
• Turn Off Windows Fast Boot
  Even if you fix Ubuntu, Windows’ fast boot can mess with hardware states. In Windows:
  1. Go to Control Panel → Power Options → Choose what the power buttons do
  2. Click Change settings that are currently unavailable
  3. Uncheck Turn on fast startup (recommended) and save.
• Test Single-System Stability
  Boot only into Windows, restart a few times to see if the black screen returns. Do the same for Ubuntu. If one system works fine alone, the issue is definitely a dual-boot power conflict.
• Reseat Hardware (Careful!)
  If nothing else works, try reseating your RAM (power off, remove battery, ground yourself by touching metal, open the back, gently pull out and reinsert the RAM sticks). Loose memory can cause intermittent display issues.

Ubuntu’s fast boot is separate from BIOS/Windows fast boot—here’s how to turn it off:

• Modify GRUB Configuration
  This is the most reliable method:
  1. Open a terminal and run: sudo nano /etc/default/grub
  2. Find the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" and edit it to:
     GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noefi fastboot=0"
  3. Press Ctrl+O to save, then Ctrl+X to exit the editor.
  4. Update GRUB with: sudo update-grub
• Disable systemd Fast Boot Service
  Run this command in terminal to stop the systemd fast boot service:
  sudo systemctl disable systemd-fastboot.service

After making these changes, reboot your laptop and monitor if the black screen issue persists. Most dual-boot display problems tied to power go away once both systems’ fast boot settings are fully disabled.

内容的提问来源于stack exchange，提问作者Deepak