I am also affected by this bug on my Lenovo laptop
I have an external monitor plugged in all the time, that means after the
display manager starts, the internal monitor is unusable (showing "snow"
and lines).
fixed this temporarily by booting 5.11 kernel instead of 5.13
*-display
description: VGA compatible controller
product: Renoir
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:07:00.0
logical name: /dev/fb0
version: d1
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
fb
configuration: depth=32 driver=amdgpu latency=0 mode=1920x1080
visual=truecolor xres=1920 yres=1080
resources: iomemory:40-3f iomemory:40-3f irq:87
memory:460000000-46fffffff memory:470000000-4701fffff ioport:1000(size=256)
memory:fd300000-fd37ffff
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https://bugs.launchpad.net/bugs/1958591
Title:
[amdgpu] Random noise 'static' display after internal display turned
off/on
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