i965G (Asus P5B-V): Diagnosing ADD2/SDVO issues

Rene Wagner reenoo at gmx.de
Thu Mar 1 10:50:29 PST 2007

Hi Keith,

On Wed, 2007-02-28 at 09:49 -0800, Keith Packard wrote:
> On Wed, 2007-02-28 at 16:23 +0100, Rene Wagner wrote:
> > Now, I get a signal on the DVI port for a few seconds after switching
> > the computer on. Then it just dies. The intel driver shows that an
> > SDVO adapter is present in the register dump, but then fails to
> > recognize a device (log using a git build as of last night attached).
> The driver sees the SDVO channel on the chip as it does with all
> hardware that has SDVO, but it can't detect anything on the line with
> I2C, which seems to strongly indicate that the card and the motherboard
> aren't talking.

OK, thanks for confirming.

> That the BIOS also fails to initialize the SDVO link is another
> indication that the card isn't compatible with the motherboard; the BIOS
> should auto-detect and configure the card.

Would there be any DVI signal before the BIOS does the configuration?
The symptom I see is that I do sometimes get a signal up until grub

> > Does anyone have any recommendations how to diagnose the problem? Is
> > this a case of incompatible hardware, a broken BIOS, or is the hardware
> > just faulty? Reports of any other ADD2/SDVO cards working with the
> > Asus P5B-V board would also be appreciated.
> I haven't tried this board; do you know if it uses ADD2-R cards instead
> of the ADD2-N card?

Asus sells an ADD2-R just for one particular board, the N4L-VM DH. For
all other boards with i915, i945, i965 chipsets they sell an ADD2-N

The Asus manual that's now linked to from the X.org Wiki (thanks guys!)
indicates that it's also a Silicon Image card, but based on the 
Sil 1632 whereas the card I have comes with an Sil 1642.

Could that make the difference? I could order the Asus card once any
reseller has it in stock again.

The other thing I found at [1] is:

"The eventual critical step appeared to be to load the Intel driver
under windows. After this, I was able to get BIOS, linux console, and X
on the DVI output."

Could there be any truth in that? It would be the first time any of my
personal workstations run Windows in five years, but hey...



[1] http://lwn.net/Articles/194763/
Rene Wagner
reenoo at gmx dot de
4F33 7FD7 93B3 166B BADA  D6F8 71A1 FEA8 58B4 36D0
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.x.org/archives/xorg/attachments/20070301/49fc20f9/attachment.pgp>

More information about the xorg mailing list