Comment 7 for bug 1725395

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Paolo Devoti (devotip) wrote : Re: screen resolution detected is incompatible with UHD tv

more from dmesg about amdgpu
[ 1.199336] amdgpu 0000:02:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff

and there is at least one talk already open elsewhere
https://bugs.freedesktop.org/show_bug.cgi?id=98798