Dual AMD R9 290X cards. Blank display on boot with kernel 4.1.2 and 4.1.3. Can't see anything. Display LCD backlight is on but nothing displays and I have to hard reboot. Problem does not arise on kernel 4.0.8. With kernel 4.0.8, boots up normal, login shows up normally, etc. Again this is with dual R9 290X cards.
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