#1147129 Montor loses signal when installing base system.

#1147129#5
Date:
2026-09-08 02:44:49 UTC
From:
To:
Boot method: USB Stick
Image version: https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-13.6.0-amd64-netinst.iso
Date: 2026 September 7th

Machine: iBUYPOWER Desktop
Device Name	DESKTOP-MNQS0LM
Processor	11th Gen Intel(R) Core(TM) i7-11700F @ 2.50GHz   2.50 GHz
Installed RAM	16.0 GB (15.9 GB usable)
Storage	466 GB SSD ADATA SU670, 1.82 TB HDD ST2000DM008-2FR102
Graphics Card	NVIDIA GeForce RTX 3060 Ti (8 GB)
Device ID	BF29F6D7-AC70-4027-AB8C-9CED2CA4E5CE
Product ID	00326-10000-00000-AA935
System Type	64-bit operating system, x64-based processor
Pen and touch	Pen support

Processor:
Memory: 16 GB
Partitions:
[image: partition_tables.PNG]


Output of lspci -knn (or lspci -nn): (NA: I don't have this installed
on Windows)

Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [O]
Detect network card:    [O]
Configure network:      [O]
Detect media:           [O]
Load installer modules: [O]
Detect hard drives:     [O]
Partition hard drives:  [O]
Install base system:    [E]
Clock/timezone setup:   [ ]
User/password setup:    [ ]
Install tasks:          [ ]
Install boot loader:    [ ]
Overall install:        [E]

Comments/Problems:

I've been having trouble trying to make a dual boot system out of my
Windows 10 machine.

I've been using the automatic hardware and network detection, and the
guided partitioning, using the largest empty space with all files in
one partition.

Disk 0 Partition 3 and Disk 0 Partition 4 are created by
debian-installer before it breaks. I've had to reopen Windows and
delete those before each installation attempt.

Partway through installing the base system my monitor loses signal.
Section 5.4.4. of https://www.debian.org/releases/stable/amd64/
mentions that "vga=normal nomodeset" could possibly help with a black
screen, but this didn't work. I assume the passage meant that the
monitor was receiving an invalid signal, not no signal at all, but I
thought it was worth trying.

I've tried both the graphical and text based installer and encountered
this problem.

I've tried installing the latest Nvidia drivers but that didn't help.

The attached videos capture the moment it happens.


 IMG_3775.mov <https://drive.google.com/open?id=1c9CtlhOWuCV_RLUBm5QQdMgwjKCZhCiz>

 IMG_3774.mov <https://drive.google.com/open?id=1o--Mhgycs6pvtbROJ_m0HLhuwU8U-PIa>

#1147129#10
Date:
2026-09-08 06:39:41 UTC
From:
To:
The installer can blank the screen after a while (about 10 minutes, IIRC). Did you press some keys (e.g. the space bar) on the keyboard to turn the screen on again?

With kind regards,
Roland Clobus

#1147129#15
Date:
2026-09-09 07:07:23 UTC
From:
To:
With kind regards,
Roland Clobus

PS: Keep 1147129@bugs.debian.org in the replies, otherwise the mailing list cannot see the responses.