[rescue] 1920x1080 @ 60 Hz on a Creator 3D under NetBSD (Was: FB resolution in PROM)

Phil Stracchino phils at caerllewys.net
Sun Nov 15 11:55:15 CST 2015

On 11/15/15 10:11, Romain Dolbeau wrote:
> Well, the FFB hardware does support 1920x1080 at 60 :-)
> Since none of my cables seemed to let the EDID through, I dumped it on a
> Linux box and baked the EDID block directly into the NetBSD kernel. Ugly
> but it works. At this point, the NetBSD FFB driver would change the
> resolution and the screen would lose sync, claiming "no signal". After many
> trials at various resolutions, it turns out that I need to hardwire
> EDID_VIDEO_INPUT_COMPOSITE_SYNC to set, otherwise nothing gets displayed.
> But with this additional hack, I can get both VESA 1920x1080 (148.5 MHz)
> but also the monitor EDID value, which is the same resolution but at 173
> MHz of pixel clock.

Victory!  :)

  Phil Stracchino
  Babylon Communications
  phils at caerllewys.net
  phil at co.ordinate.org
  Landline: 603.293.8485

More information about the rescue mailing list