os: opensuse tumbleweed x86_64
kernel: 4.9.11-1-default
cpu: AMD FX(tm)-8350
video card: Sapphire Nitro Radeon RX 460
Driver: "amdgpu"
monitors:1.BenQ M2700HD, 2.DELL P2210

Computer booted up and operating OK until Latest update using zypper dup
(25/2/17).
Computer starts in text only mode to tumbleweed selection screen and freezes
just before login with a yellow & light green checkered pattern on screen.
This happened on every start up of computer until video card 'Sapphire nitro
rx460' replaced with 'gigabyte ATI Radeon R7 260X(Bonaire)'.