I've got two screens connected, one Sony TV 32" (old LCD) and one noname 17" regular PC screen. The problem is before login when it seems like the system alters between the two at boot, before login. After login in Xfce - no problem.

So I can't see the grub menu. I'm sure it's there but for that brief moment the screen is black. It's no biggie because , if needed, I can disconnect one of the screens and I'm sure I'll see the grub menu again.

What can I do with the configs, grub or whatever, before boot?

Must report success! Set up  my DAW with Devuan couple of weeks ago replacing PCLinuxOS. Got JACK 2 and Qjackctl plus Reaper/Midi/Audio working wihtout too much hazzle. Of course without Pulseaudio and no Pipewire either.

But no sound in Firefox or Chrome. No biggie but it is nice to be able to listen to youtube tracks/music on your DAW.

I finally solved it after hours of googling and several .asoundrc versions.

This is the .asoundrc that fixed it:

pcm.!default {
    type plug
    slave { pcm "jack" }
}

pcm.jack {
    type jack
    playback_ports {
        0 system:playback_1
        1 system:playback_2
    }
    capture_ports {
        0 system:capture_1
        1 system:capture_2
    }
}

ctl.mixer0 {
    type hw
    card 0
}

Not using apulse either. Jack2 and Qjackctl are running at boot and voilá sound in Firefox-esr! No sound in google chrome or chromium yet, but that's ok.
I did check though, that the proper audio interface was default card 0. I also double checked that the DAW, Reaper, worked, and it did.

Just wanna share if some other Devuan fan running JACK encounters the same problem.

EDIT:  Holy Crap!! There IS sound in Google Chrome too!!! Just needed to restart it.

Keywords: alsa, asoundrc, firefox, chrome, jack, jack2, daw, reaper

I just got my new used PC and moved the SSD with my Devuan install and success! It booted right away!

Newer Bios:es are scary with Secure Boot, UEFI, TPM and stuff but I looked thru the bios settings beforehand and legacy boot seemed activated.

This is my DAW machine and everything worked; second HD, USB audio card, ethernet, and best of all - both my screens worked as well. Almost no config  at all.

It's an HP PRODESK 600 G2, i7. Bought it from a company for about 250 EUR/260 USD.

So Devuan is the thing!

I just made the transition from an outdated and botched PC Linux OS installation to Devuan. It was on my music studio desktop machine.

After some tinkering I now got Jack, QJackctl and Reaper running with an USB Midi Keyboard and a Focusrite 2in4 audio interface. Latency is OK, but I will try the RT kernel and see if it can fix a tiny bit better latency on my old machine. And two screens directly at first boot!

Thanks Dev Team!

PS. I've been using Ubuntu since 2007 and I really do not like the way it's going. Systemd is NOT good!
PPS I do not have Windows at home (pun intended)