The /dev/dri/card1 device is created on my system even when the iGPU is disabled in the BIOS. Opening and closing this file (writing anything to it is not required) makes the screen turn off and on during boot or when in a TTY. This can happen when running e.g. ddcutil or even just starting an X server.
My system:
Dell G16 7620
i7-12700H
RTX 3060 Mobile
Arch Linux driver version 560.35.03
nvidia-bug-report.log.gz (2.1 MB)
udevadm-info.log (4.7 KB)
Related issue on ddcutil github: Monitor resets many times on boot after new udev rule installed · Issue #428 · rockowitz/ddcutil · GitHub
Steps to reproduce:
- Disable iGPU (and secure boot?) in BIOS
- open a TTY (ctrl+alt+f3)
echo -n '' | tee /dev/dri/card1(no root perms required)