Re: [foxboro] D-style Sun box loses video

The primary frame buffer on the 51D uses the "m64" driver off
the mother board. During startup "openwin" is started using "/dev/fb0"
for the primary display. On the 51D "/dev/fb0" should be a link file 
to "/dev/fb1/m640" which links to the actual devices file. 
They should look like.
# l /dev/fb0
lrwxrwxrwx   1 root     root           8 Feb  6  2004 /dev/fb0 -> fbs/m640
# l /dev/fbs/m640
lrwxrwxrwx   1 root     root          47 Feb  6  2004 /dev/fbs/m640 ->
../../devices/pci@1f,0/pci@1,1/SUNW,m64B@2:m640
Try looking to see if the resolution of this particular frame buffer was
changed using the "m64config" command:
For example:
                # m64config -prconf
If not previously changed the resolution should be at Sun native which is
1152x900x76. You can check "m64" was loaded using the "modinfo" command
but I think you have seen other errors at the console (white screen)
during boot if that were the case.

FYI, the second head on a 51D could use an "m64" instance for the PGX24 and
PGX64 cards or "gfx" for the PGX32 card (separate pkg and driver).
Mark Gardner

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of duc.do@xxxxxxxxxxxxxx
Sent: Wednesday, February 22, 2006 9:55 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] D-style Sun box loses video

Hi list,

Another day, another problem.

I have an AW51D (Sun Ultra 5) with dual-head video. Recently it lost the
video out from the primary video port, but in a peculiar way.

I can see all the POST messages (on white background) fine until the
Foxboro I/A signal kicks in (when the screen normally turns to the light
blue background), then I get nothing but a dark screen. The box would
continue to boot up fully and I can see the video signal on the
secondary display.

I pull the hard drive and put it into another Ultra 5 box, but the same
symptom persists, so I ruled out hardware problems and started to look
at corrupted graphic drivers or something along that line.

Searching the foxboro archive (from another problem of mine three years
ago, http://www.freelists.org/archives/foxboro/03-2003/msg00042.html)
led to inspecting the graphic driver in /dev/fb0, but that didn't shed
much light (it's there, and looks similar to that on an operational
box).

Searching Google for graphic problems with the Ultra 5 really didn't
help much as this problem rears its head when the display is switched to
the Foxboro graphic signal.

(Yes, I've tried 'boot -r'.)

Anybody experiences this same problem? Anybody knows how to fix it?
Thanks for any information.

Duc

--=20
Duc M. Do
DCS Group, Carrollton Plant
Dow Corning Corp.
Carrollton, KY, US
 
 
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