Re: AMD A8-3870

[Taylor R Campbell <campbell+netbsd-tech-x11%mumble.net@localhost>]

   Date: Sat, 22 Aug 2015 20:32:31 +0900
   From: Ryosuke Moro <szptvlfn%a-net.email.ne.jp@localhost>

   radeondrmkmsfb0: framebuffer at 0xdd8e3000, size 1920x1080, depth 32, stride 7680
   DRM error in atom_op_jump: atombios stuck in loop for more than 5secs aborting
   DRM error in atom_execute_table_locked: atombios stuck executing E262 (len 2585, WS 4, PS 4) @ 0xE94C
   DRM error in radeon_dp_link_train_cr: clock recovery reached max voltage
   DRM error in radeon_dp_link_train_cr: clock recovery failed
   wsdisplay0 at radeondrmkmsfb0 kbdmux 1: console (default, vt100 emulation), using wskbd0

This looks suspicious!  Not sure what the root cause is, but these
messages may help navigate the parts of the code are relevant to the
problem.