[SOLVED] getting boot output using only HDMI monitor

[JSJB]

I would like to see the output while my system (details at bottom) boots when the monitor is connected only with an HDMI cable.
Currently I have both DVI and HDMI and I have no problem seeing the output using DVI but see nothing with HDMI.

I have an Nvidia 1070 and a motherboard that does not support UEFI.

I do not use a display manager but boot into a console and once the login prompt appears, log in and start X manually. I want to continue this
(even though I do check boot output later with
This is to understand what would be needed to switch to a newer graphics card and monitor that would come without any DVI interfaces.

I suspect this might be fixed with a better grub config.

System details: trixie/sid, linux-image-amd64 6.5.13-1, nvidia-driver 525.147.05-4, systemd 255.2-2

/etc/default/grub:

Code: Select all

GRUB_DEFAULT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_TIMEOUT=11
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=5"
GRUB_CMDLINE_LINUX="splash nomodeset loglevel=5 fsck.mode=force video=HDMI-0:e"
GRUB_BACKGROUND=/boot/grub/splash_images/gnome-splash-curves.png
GRUB_GFXMODE=2560x1440,1920x1080,1600x1200x16,1600x1200,800x600x16,800x600,640x480,auto
GRUB_DISABLE_LINUX_UUID=true

Any ideas for how to make this work?
thanks!

[CwF]

I would like to see the output while my system (details at bottom) boots when the monitor is connected only with an HDMI cable.

Have you tried it with the DVI disconnected?

The initial boot screen doesn't have anything to do with any OS, or grub.

I have mentioned before a particular monitor that would not initialize the hdmi input on power up, that was the monitor not the gpu or OS.

Maybe a new-to-you gpu, most all cards I've ever used will initialize the only connected output regardless of the typical priority order of vga>dvi>dp>hdmi.

But then maybe I don't always pay attention...

[JSJB]

Have you tried it with the DVI disconnected?

Nailed it: disconnecting the DVI cable and leaving only the HDMI connected worked!
Thanks a lot!

[Aki]

Hello,

Nailed it: disconnecting the DVI cable and leaving only the HDMI connected worked!
Thanks a lot!

I'm glad you sorted it out. :)

Please, mark the discussion as "solved" manually adding the text tag "[Solved]" at the beginning of the subject of the first message (after other tags, if any); i.e. :

[Solved] getting boot output using only HDMI monitor

Happy Debian !

[Aki]

Topic moved to "Hardware" sub-forum.