I have a dual boot with wn10 and everything is fine when I am connected to my TV screen.But this is not the case with a laptop screen which I am reusing (the laptop is dead and I am using a dedicated board found on the net that matches the screen).
The grub menu does not show up. It seems the board only detects the HDMI connection when systemd starts. Then it is ok with Manjaro.
But I have no choice. What can explain that the grub screen cannot be displayed?
Can you see Bios screen, at first power on, are you using UEFI or Bios Boot, Have you tried:
If your computer uses BIOS for booting, then hold down the Shift key while GRUB is loading to get the boot menu.
If your computer uses UEFI for booting, press Esc several times while GRUB is loading to get the boot menu.
Or do you mean the screen will not power up until later in the boot up sequence?
You can also check {root}etc/default/grub with a text editor and see what these 2 lines say:
GRUB_TIMEOUT=0
GRUB_TIMEOUT_STYLE=hidden
The GRUB_TIMEOUT= will be a number, i think it might be 5 as default (5=5 seconds etc)
If it looks like the above then using root permissions edit it to:
GRUB_TIMEOUT=10
GRUB_TIMEOUT_STYLE=
Yes leave this blank after the = “GRUB_TIMEOUT_STYLE=”
Save file then update grub from terminal.
Thanks, I will try that. Actually I have to switch on the screen manually with this screen. And it will display a small window saying that an HDMI input is expected. This input does show up only when Manjaro starts, whereas I would expect it on boot, at least with Grub.
No. When I press F2, which should open the Bios/Uefi, my screen remains blue with the small window saying it expects an HDMI input.
It works on my TV screen, but not on the laptop screen. There is something about the board obviously, but what? as it is fine once Manjaro has started.
Sounds like something wrong hardware wise with the monitor or how ever it’s connect to the laptop, once you power on the Laptop it should send a wake up signal to the monitor, as it does over HDMI, The Bios does this first so it should already be power up before GRUB, Try re-seating all connections, check ribbon cable from the monitor is not bent or cut/broken, and last check the screen is really the right one for your laptop, the only other reason a monitor would not wake up from bios is if the monitor could not/does not run at said low resolution/refresh rate so stays blank until Manjaro Booting up changes the resolution to something the Monitor understand, you could try setting a low resolution once manjaro is on desktop, try setting 640x480 and see if the display blanks out.
Yes, my Windows is also legacy from the beginning and I am not sure I had the option. Does it make a difference regarding the display ? The question is also why does it work fine on my TV screen and not on the laptop screen?