Hello, guys. I have always used Debian normally, and suddenly, after the line
the screen turns completely black and i am forced to power the computer off manually.

My laptop is a Dell Vostro 1320 (Intel Core 2 Duo). I use the "unstable" repository, but already tried downgrading to "testing", to no avail (although i have not tried stable, and will not, because i need packages to be as up to date as possible for my personal projects).

I can currently boot normally using the "nomodeset" parameter, but the resolution, proportion, fonts and icons are all horrible. I have tried reinstalling firmware-linux, firmware-amd-graphics and xserver-xorg-video-intel, also to no avail.

Do any of you have any suggestions on how to approach this issue? Thanks in advance!

I recently had similar issue when booting with Nvidia graphics enabled, (I can switch graphics from Nvidia to Intel and vise versa via hardware switch), I used to have: in /etc/default/grub for a year or so. Then the issues you are experiencing started a couple weeks or month ago. I found booting to rescue mode, then hitting CTRL+D to continue would get it to boot to the desktop.

So I eventually fixed it by removing "modeset nouveau.modeset=0" from that line in the code above and just having "quiet", then running update-grub command and now it boots normally. But had no issues when booting with Intel graphics enabled.

and what if it turns out that the computer works flawlessly with stable?

in any case, 'nomodeset' is something you use until you fixed your graphics issues, then you can remove it again.

Brains: thanks for the reply. I have already tried adding "modeset nouveau.modeset=0" as suggested here https://www.linuxquestions.org/quest...en-4175620654/ (there was already only "quiet" in GRUB_CMDLINE_LINUX_DEFAULT). Black screen. Tried booting to single-user mode. Black screen. Hit Ctrl-D. Black screen.

ondoho: yeah, if it turns out there is no other option, i'd rather sacrifice current updates than have an unusable computer. Though i need to try everything before that.

What happens with a different kernel?
I ask because I have the same problem on an old Dell laptop on testing.
Black screen on kernel 4.18.0-3 but boots ok on 4.18.0-2.

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Dennis99: thank you very, VERY much, sir. That worked. I installed 4.18.0-2 and removed linux-image-amd64 to prevent further upgrades. But does this mean i will not be able to upgrade the kernel anymore?

The $64,000 question, I wish I knew. I've not really looked into why it doesn't boot on 4.18.0-3.

Edit: Looked into this a little. I use the pae kernel if that makes a difference.
Edited the 4.18.0-3 linux line in grub, deleted quiet to see what's happening, added nomodeset and rebooted and it booted.
Did an update (169) and rebooted, still didn't boot without deleting quiet and adding nomodeset so I'm now assuming it's graphics related.

isn't it possible to use an LTS kernel even on unstable/testing?