See: Haiku 64bit on Ryzen - #84 by roiredxsoto
First, review proper monitor connection (VGA / DVI / HDMI / DP) . Boot computer - normally, you’ll see your motherboard’s BIOS bootup menu or splash screen during a cold (or warm) boot.
Now that you have basic video output from the graphics card… try booting Haiku!
- Using Haiku hrev55916 x86_64 and above: Try to boot to the Haiku desktop (or Haiku boot manager)
If booting to the Haiku desktop and If your display goes black and you can’t get the display working again (without rebooting) - basically…:
See: Boot Loader
- Enable the Haiku boot manager and activate the fail safe video mode. Continue booting to desktop.
If this fails, create a bug report and provide the ‘radeon_hd’ driver developer(s) with a syslog file and basic computer configuration setup.
Note: You can also modify the kernel config setting driver file for enabling the fail safe video mode on every boot (and set the VESA resolution)…