Black screen after rocket icon on AMD Richland APU laptop with nightly 56098

[jvwN900]

Workaround is enabling failsafe/fallback graphics, although that is only possible when booting from the live USB with this HP ProBook (unable to access the bootmenu when booting from an SSD installation). R1 beta 3 uses the framebuffer driver by default on this hardware and therefore boots without issue to the desktop.

GPU id = 0x9995 (also correctly detected as Radeon HD 8450(G))

microarchitecture = TeraScale 3/VLIW4

codename = Northern Islands/Aruba

graphics processor = "Scrapper"

Based on the log the issue appears to be DisplayPort-related and therefore is likely to occur on other similar AMD-powered laptops with DisplayPort connector (e.g. HP ProBook and EliteBook series).