Comment # 26
on bug 108521
from Christian König
I don't want to stop your cheering, but that isn't a perfect solution either. (In reply to Robert Strube from comment #25) > I'm wondering where I can report the Thunderbolt Controller / Bridge bug? > Perhaps you fine folks can point me in the right direction? That is unfortunately most like a bug in the BIOS. What happens here is when you specify acpi=off that the internal Vega M gets disabled and the address space that one used freed up. This address space is then used for the Thunderbolt Controller to handle the Polaris. What you could try is to blacklist amdgpu from automatically loading and then issue the following commands as root manually: #Disable the internal Vega M echo 1 > ./bus/pci/devices/0000:01:00.0/remove #Manually load amdgpu to initialize the Polaris modprobe amdgpu #Rescan the PCI bus to find the Vega M again echo 1 > ./bus/pci/devices/0000:00:00.0/rescan It's just a shot into the dark, but that might work as well. Apart from that there isn't much else you could do except to upgrade the BIOS or use different hardware.
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