Bug 1376 - DDC Version 1.0 monitors won't auto configure
Summary: DDC Version 1.0 monitors won't auto configure
Status: RESOLVED WORKSFORME
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/General (show other bugs)
Version: unspecified
Hardware: x86 (IA32) All
: high minor
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2004-09-14 09:13 UTC by neil macphail
Modified: 2010-05-06 13:09 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Attachments

Description neil macphail 2004-09-14 09:14:13 UTC
Monitor KTX Bridge BGA00 not configured correctly. KTX DDC is Version 1.0 EIDE
and only returns Supplier and Model Number and DDC version number with week and
year of manufacture. Xorg assumes 0 strings in 128 byte block read from monitor
are clock settings and refuses xorg.conf settings as out of the range read.
Windows uses monitor.inf files to look up clock settings using DDC V1.0 supplier
and Model number data as this cannot be read from the monitor. Suggest check
version number and then copy windows method or set "NoDDC" The problem was
definitely in grope and configuration as if I initialised using a Belinea
monitor I could replug to the KTX and all modes worked. Workaround was to set
"NoDDC" a parameter missing in the documentation.
Comment 1 Erik Andren 2006-04-16 20:55:52 UTC
Are you still having the same issue with a current version of xorg?
Comment 2 Luc Verhaegen 2006-04-16 21:32:11 UTC
When EDID 1.0 doesn't get implemented, then this should get ignored completely,
as i'm not sure that that is the current behaviour, from the bug.

This is indeed where a monitor DB is the only solution, when it does get
implemented.
Comment 3 Luc Verhaegen 2006-04-16 21:42:27 UTC
Anyway, do please provide a log of a run with the older monitor attached.
Comment 4 Erik Andren 2006-04-28 19:51:27 UTC
Ping to the bug submitter!
Comment 5 neil macphail 2006-05-02 04:41:21 UTC
Sorry, I now have an LCD at this late date, so I can't provide any more data.
Cheers N
Comment 6 Luc Verhaegen 2006-05-02 05:26:51 UTC
This is one of those things where the problem clearly persists, even if the
reporter no longer has the hardware to test it. Shoving it under the rug will
mean that it'll pop up anyway at a later time.

I'm seriously dropping severity, but should remain open until either DDC 1.0
gets ignored properly, or until this gets handled by a monitor database.
Comment 7 Daniel Stone 2007-02-27 01:24:07 UTC
Sorry about the phenomenal bug spam, guys.  Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Comment 8 Adam Jackson 2010-05-06 13:09:02 UTC
I've run X on EDID 1.0 monitors.  It works fine.  We'd need to see the actual EDID block to know if there's a real issue here.


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