[SOLVED] Failed to start load/save screen backlight

[L1miter]

Since I upgraded my system from an Intel CPU that didn't have an integrated GPU to an AMD Ryzen 9 7950X that has an iGPU, I get this error:

Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.

When I boot with an HDMI cable inserted into the motherboard's HDMI port, I don't get the normal command line login screen. However, if I insert the cable into the GPU, a GTX 1060, it works and I am able to see the login screen.

The error doesn't affect the boot-up process of Proxmox. Proxmox starts up successfully, but I have the GTX 1060 passed through to one of my VMs. Once it starts up, the GPU switches to the VM. However, I would like to have access to the command line because I have needed it a few times in the past, and I had to restart the machine to get it. Unfortunately, I have no idea what is causing this issue, and my searches for a solution have been unsuccessful.

my system:
CPU: AMD ryzen 9 7950X
Motherboard: Asus prime x670-p wifi
RAM: Kingston hyperX 64GB (4x 16GB)
GPU: Nvidia GTX 1060
Proxmox version is 7.4-3

 

[Neobin]

If you are not already using it, I would try the 6.2 opt-in kernel: [1] with that new hardware.

[1] https://forum.proxmox.com/threads/opt-in-linux-6-2-kernel-for-proxmox-ve-7-x-available.124189

 

[L1miter]

If you are not already using it, I would try the 6.2 opt-in kernel: [1] with that new hardware.

[1] https://forum.proxmox.com/threads/opt-in-linux-6-2-kernel-for-proxmox-ve-7-x-available.124189

Thank you this worked for me.