Re: R10K crmfb

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Jun 24, 2008 at 09:15:12PM +0100, Stephen Borrill wrote:
> On Tue, 24 Jun 2008, Manuel Bouyer wrote:
> >>>Well, crmfb0 itself doesn't work. The system boots, but the display is
> >>>messed up: thin (1 pixel) dark red vertical lines on a black
> >>>background,
> >>>with 6 2-pixed white horizontal lines, starting a line 0.
> >>
> >>This is weird, as if the graphics backend reads from different tiles
> >>than the rendering engine writes to, or the rendering engine doesn't
> >>render. Crmfb doesn't directly access any visible video memory - to
> >>avoid having to deal with tile borders I have rasops draw into an off-
> >>screen tile and then blit it into place. Maybe I should memset() it
> >>with something recognizeable for testing.
> >>Do the red lines disappear eventually?
> >
> >No. But the white line appears in several steps while the system is
> >booting, they seem related to wscons printing characters on
> >the display.
> 
> Is the pattern steady or does it jitter? This sounds very similar to 
> the problem I reported with my O2 last week on port-sgimips. I just 
> didn't give such a detailed description...

The horizontal lines do jitter, the vertical ones are stable.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--