Q4OS Forum

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Display problems after installation

I have Installed Q4OS on my desktop computer. During the booting, initially the log screen appears as usual, but later the display turns black. Any keyboard input does not work. When I press the shutdown button, the log screen appears again, and it is shutting down. Booting  the older kernel does not help. When I start the recovery mode, I can log in with my password, but I do not know, what to do next. We have a very big screen, so it is hard to see the tiny characters, if they are in the left upper corner.

hchiper

Member

From: Belgium

Registered: 2020-07-28

Posts: 790

Re: Display problems after installation

Did you ever use a secondary screen? If so connect it again and see what happens.

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Q4OS machine: Samsung R519 - Pentium T4200 2.0 GHz - 4 GB RAM - 500 GB SSD

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Welcome to the forum @PotentialUser

Please post a brief hardware specification.

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

This is the area from Q4os live Hardware Info:
(live System works)
System: Plasma 6.3.6 Q4os 6.1.1 deb13u1 (Andromeda)
Kernel: 6.12.43+deb13u1-amd64
CPU: Intel(R) Core(TM) i7-4790 CPU @3,6 GHZ
Ram: 12GB total 2 TB
Grafik Nvida GK104 [GeForce GTX 750 OEM]
Mainboard: Medion H81H3-EM2

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

@hciper:

My computer has two HDMI ports which usually show different screens.
But in this case they are both black.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Are you able to boot and install from the Debian live ? "debian-live-13.1.0-amd64-kde.iso" , download https://cdimage.debian.org/debian-cd/cu … so-hybrid/

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

I already installed from the Q4OS live. Should I rather install from the Debian live?

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Do we understand correctly that the Q4OS installation is unusable ? If so, the alternative is to install from Debian live. Please post the result back for us to get a feedback for possible fix.

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

Is there a opportunity, that I first install Debian and then upgrade it to QSO4?

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Yes, install Debian and follow instructions https://www.q4os.org/dqa017.html

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

I will try to Install Quarkos Noble Plasma live instead. Because it is inside the Q4OS Imager and I had not problems with Ubuntu before.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Yes, it's the fine way too.

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

I tried the Quarkos live but could not boot it. Then I successfully installed de Ian. Which is now the easiest way to switch to q4os?

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

I started the steps of https://www.q4os.org/dqa017.html
Then the script said everything is installed and I should reboot.
When I reboot I am in the former Debian again.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Please run in terminal:
$ get-q4os-version
$ qrepolist
and post back the output.

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

$ get-q4os-version
6.1.1-deb13u1
$ qrepolist
deb http://deb.debian.org/debian/ trixie main contrib non-free non-free-firmware
deb http://security.debian.org/debian-security/ trixie-security main contrib non-free non-free-firmware
deb http://deb.debian.org/debian/ trixie-updates main contrib non-free non-free-firmware
deb http://q4os.org/q4repo/ q4os-6-0-cn main

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Well, so you have Q4OS Plasma installed, all seem good., please see https://www.q4os.org/forum/viewtopic.php?id=5770

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

Shall I succeed with following?
$ sudo qrepoadd mx-tools
$ sudo apt update
$ sudo apt install q4os-mxtools-plasma
or
$ sudo apt install q4os-mxtools-trinity

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

No, this method has a bug what is going to be fixed. We recommend you to use the preferred method using the .qsi installer, see https://www.q4os.org/forum/viewtopic.php?id=3477

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

The links to the website aren't very clear for me.
Should I download this one?
setup_q4os-mxtools-plasma_5.3-a1.qsi

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

Yes, use setup_q4os-mxtools-plasma_<version>.qsi for Plasma or setup_q4os-mxtools-trinity_<version>.qsi for Trinity desktop. Download from here https://sourceforge.net/projects/q4os/f … ntal_apps/

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

As I started "setup_q4os-mxtools-trinity_5.3-a1.qsi there was the error "Simulation not succesfull, sorry, I cannot install now.
...Unable to satify two dependicies Reaced two comflicting deciosions:
1. q4os-mxtools-trinity:amd64_5.3-a1 is selected to install
2.q4os-mxtools-trinity:amd64_5.3-a1 hängt ab von q4os-desktop-trinity
but none of the choices is installable

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

Installing mxtools-plasma instead.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 6,114

Website

Re: Display problems after installation

As I started "setup_q4os-mxtools-trinity_5.3-a1.qsi ...

As we know you are using Plasma https://www.q4os.org/forum/viewtopic.ph … 763#p32763, so why didn't you start with mx-tools for Plasma .qsi installer ?

PotentialUser

Member

Registered: 2025-11-08

Posts: 20

Re: Display problems after installation

Error after installation of mx-tools. plasma:
Copying system packages.. Done
Update sw database...
Widersprüchliche Werte gesetzt für Option Trusted betreffend due Quelle...
E: Die Liste der Quellen konnte nicht gelesen werden.
Testing installation : Done