today i switch from Sapphire Radeon 6450 to Gigabyte Radeon R5570 OC version with 2GB and card do not work.
i think ID is missing
device/type 0x3
device/vendor 0x1002
device/id 0x675f
You might want to try filing a bug report 
today i switch from Sapphire Radeon 6450 to Gigabyte Radeon R5570 OC version with 2GB and card do not work.
i think ID is missing
device/type 0x3
device/vendor 0x1002
device/id 0x675f
You might want to try filing a bug report