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I recently downloaded Arch Linux on an old laptop using archinstall. I chose grub. I'm not sure if I have BIOS or UEFI. The problem is that neither grub nor BIOS/UEFI show up on the TV. It loses signal and regains it only at the login screen of ly.
I tried these things, but neither worked.

  1. Set my TV as primary monitor.
  2. Remove the whole display cable from the motherboard
  3. Use fn + F4, F10 and others to try special boot options

I use Arch Linux, my boot loader is grub, and I use primarily Hyprland and sometimes Gnome.

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    What OS is installed has nothing to do with the BIOS or UEFI firmware splash screen - it's not unusual for laptops to not output the splash screen on an external monitor, and if the splash screen displays without the external monitor connected, but doesn't with it, that's likely what's going on Commented Mar 18 at 10:30
  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. Commented Mar 18 at 10:44
  • What model is the laptop? What's the BIOS version? Does BIOS/grub appear on a regular external monitor, not a TV? Does BIOS/grub appear when an external monitor is connected via VGA? Commented Mar 18 at 13:11

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It is common for laptops to only display BIOS and other pre-boot screens only on the internal display.

While you may be able to find a setting in the BIOS to change this, in my own experience most systems that behave this way do not have a setting in BIOS to change this.

The testing you've already done seems to confirm that this is the situation you are dealing with.

Without a setting in the BIOS to change this, there is no way to work around this.

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