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probook 445r g6 unable to boot any linux - without nomodeset - acpi bios bug

HP Recommended
HP ProBook 445r G6

ryzen 3500u

integrated vega 8 gpu

8gb ddr4 2666


Every linux boots into blackscreen - without nomodeset


ACPI table problems - perhaps bios bug


At the first boot everything is ok, gpu drivers are loaded and working, the second boot is already blackscreen.

sometimes after the grub bootloader choosing of the os it shows some ACPI error messages.

Tried Ubuntu 20.04, 18.04, the newest kernel, debian and fedora always the same, first boot and all is working and every boot after that is blackscreen.

Tried every bios version, and all bios settings. Grub boot parameter workarounds did not help too.

With nomodeset (the boot paramether which disables gpu driver and uses standard) it boots always fine.

I dont know exactly what is causing this problem the gpu driver or the ACPI thing....


And please, i dont wanna hear linux is not supportet bla bla, the hp support already told me that 100 times...

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