From: Stephen Powell on
On Sat, 13 Mar 2010 21:38:40 -0500 (EST), Mark Allums wrote:
> On 3/13/2010 4:51 PM, Stephen Powell wrote:
>> On Sat, 13 Mar 2010 17:13:17 -0500 (EST), John Hasler wrote:
>>> Stephen Powell writes:
>>>> But I want a way to override things if the defaults are not to my
>>>> liking. As I mentioned in another post, there are some things, such
>>>> as HorizSync and VertRefresh, that cannot be overridden for a
>>>> plug-and-play monitor.
>>>
>>> You _could_ cut off pin 12 on the connector...
>>
>> Well, I suppose I *could*. But I don't like that solution.
>> Changing the software to allow overrides is what I want.
>>
>
> No need to destroy a cable. Just create an adapter. Pin 12 goes in,
> but doesn't come out.

Yes, that would be better. I'm sure I would have to hand-make such
a device. I doubt that I could find such a thing at my local computer
store. But still, philosophically, configuration statements should
be able to override probed values.

I've done some digging. Apparently, there is an Option statement
That is valid for at least some drivers:

Option "NoDDC"

that can be put into the "Device" section, but it is not documented
in the man page for xorg.conf. I'll have to play around to see if
I can get it to work. But that will have to wait for tomorrow.
It's time for me to go to bed.

--
.''`. Stephen Powell <zlinuxman(a)wowway.com>
: :' :
`. `'`
`-


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From: Paul E Condon on
On 20100313_223702, Stephen Powell wrote:
> On Sat, 13 Mar 2010 21:38:40 -0500 (EST), Mark Allums wrote:
> > On 3/13/2010 4:51 PM, Stephen Powell wrote:
> >> On Sat, 13 Mar 2010 17:13:17 -0500 (EST), John Hasler wrote:
> >>> Stephen Powell writes:
> >>>> But I want a way to override things if the defaults are not to my
> >>>> liking. As I mentioned in another post, there are some things, such
> >>>> as HorizSync and VertRefresh, that cannot be overridden for a
> >>>> plug-and-play monitor.
> >>>
> >>> You _could_ cut off pin 12 on the connector...
> >>
> >> Well, I suppose I *could*. But I don't like that solution.
> >> Changing the software to allow overrides is what I want.
> >>
> >
> > No need to destroy a cable. Just create an adapter. Pin 12 goes in,
> > but doesn't come out.
>
> Yes, that would be better. I'm sure I would have to hand-make such
> a device. I doubt that I could find such a thing at my local computer
> store. But still, philosophically, configuration statements should
> be able to override probed values.
>
> I've done some digging. Apparently, there is an Option statement
> That is valid for at least some drivers:
>
> Option "NoDDC"
>
> that can be put into the "Device" section, but it is not documented
> in the man page for xorg.conf. I'll have to play around to see if
> I can get it to work. But that will have to wait for tomorrow.
> It's time for me to go to bed.
>

The option UseBIOS documented in man savage, not in man xorg.conf
There is a list of driver man pages in man xorg.conf

--
Paul E Condon
pecondon(a)mesanetworks.net


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From: Stephen Powell on
On Sun, 14 Mar 2010 00:21:29 -0500 (EST), Paul E Condon wrote:
> On 20100313_223702, Stephen Powell wrote:
>> I've done some digging. Apparently, there is an Option statement
>> That is valid for at least some drivers:
>>
>> Option "NoDDC"
>>
>> that can be put into the "Device" section, but it is not documented
>> in the man page for xorg.conf. I'll have to play around to see if
>> I can get it to work. But that will have to wait for tomorrow.
>> It's time for me to go to bed.
>
> The option UseBIOS documented in man savage, not in man xorg.conf
> There is a list of driver man pages in man xorg.conf

Yes, I know. But I'm not talking about the UseBIOS option right now.
I'm talking about the NoDDC option. I did find it documented
on the Internet. For example,
see this link -> http://www.x.org/archive/X11R6.8.0/doc/rendition5.html.
The option was still under development then, and was documented as
a "previews of coming attractions" option. The NoDDC option is referred
to in man savage, but the NoDDC option is not a savage-specific option.
It is a generic option for the "Device" section and should be documented
in man xorg.conf. I have also seen bug reports complaining about the
lack of documentation for the NoDDC option. For example,
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=364610.

The above bug report implies that NoDDC is specific to the s3virge driver,
but it is actually a generic option that apparently works with all
drivers. I just tried it on my machine with the nv driver for an
Nvidia video card. It works great! I can now override the DDC2/EDID-probed
values if I want or need to! But why is the option not documented?
Is that X.Org's version of a disclaimer? The man pages for radeon and
savage allude to it, but don't document it. The man page for rendition
actually documents it, but as a "soon-to-be-implemented feature" rather than
as a production option. Oh well, at least it works.

Sorry to rain on your parade, Ron, -- er, I mean shine sun on your
funeral procession -- but you lose this time.

--
.''`. Stephen Powell <zlinuxman(a)wowway.com>
: :' :
`. `'`
`-


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