5.13 amdgpu, random pixel screen

[Markus H]

Hi, I have a Laptop with a Ryzen 5500U, running Linux Mint 20.3. To make use of the graphics driver, I update the kernel from 5.4 to 5.13. The computer is booting up, the LM splash screen apprears and then the screen gets funky with a random assignment of pixels. It seems each pixel gets a random assigned color (white, red, blue, green?, black). The pixels change color roughly every 200-500 ms. This happens with 5.13.0-28 and 5.13.0-23. The laptop is not responding to anything.

Using 5.11.22 works without any flaws. AMD gpu drivers are installed correctly.

Mandatory information 1st:

This one is running:
Ubuntu 5.11.0-43.47~20.04.2-generic 5.11.22

Description: Linux Mint 20.3
Release: 20.3

    description: Notebook
    product: 82LM (LENOVO_MT_82LM_BU_idea_FM_IdeaPad 5 14ALC05)
    vendor: LENOVO
    version: IdeaPad 5 14ALC05
    serial: MP1XXXXX
    width: 64 bits

[Juerg Haefliger (juergh)]

Can you try linux-firmware 1.187.26 from focal proposed?

https://launchpad.net/ubuntu/+archive/primary/+files/linux-firmware_1.187.26_all.deb

[Markus H (mrherr)]

Hi Juerg,
Installing the new firmware fixes it.Got some error messages but now I am on 5-13.0-28
Thank you for the support.