Re: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA

[christos%zoulas.com@localhost (Christos Zoulas)]

On May 20,  8:25am, he%NetBSD.org@localhost (Havard Eidnes) wrote:
-- Subject: Re: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA

| The following reply was made to PR port-sparc64/46461; it has been noted by 
GNATS.
| 
| From: Havard Eidnes <he%NetBSD.org@localhost>
| To: macallan%netbsd.org@localhost
| Cc: gnats-bugs%NetBSD.org@localhost
| Subject: Re: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA
| Date: Sun, 20 May 2012 10:25:05 +0200 (CEST)
| 
|  >  Ouch, I think I see where the problem comes from.
|  >  That path is apparently never taken if the console is explicitly set
|  >  to another fb or a tty since in that case OF doesn't setup the
|  >  graphics hardware and drivers abort much earlier, which is why I never
|  >  saw it. In your case OF sets it up, then decides it doesn't have a
|  >  keyboard and switches to ttya. I'll fix that, there's probably a bunch>  
|  >  of other drivers which may get bitten by that :/
|  >  I'm fairly sure that used to work though, at least sbus and UPA
|  >  framebuffers are set up even if they're not the console.
|  >  
|  >  Does this help:
|  >  @@ -326,11 +335,10 @@
|  >                       defattr);
|  >                   vcons_replay_msgbuf(&sc->sc_console_screen);
|  >           } else {
|  >  -               /*
|  >  -                * since we're not the console we can postpone the rest
|  >  -                * until someone actually allocates a screen for us
|  >  -                */
|  >  -               (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
|  >  +               if (sc->sc_console_screen.scr_ri.ri_rows == 0) {
|  >  +                       /* do some minimal setup to avoid weirdnesses 
later */
|  >  +                       vcons_init_screen(&sc->vd, 
&sc->sc_console_screen, 1, &defattr);
|  >  +               }
|  >
|  >  ?
|  
|  Yes, this fixes the problem, I now have the 6.0_BETA kernel
|  running with the pm2fb driver enabled.

Can you disable to pm2fb and see why genfb crashes too?

christos