Bug 1620 - No DVI output to 1920x1200 panel
Summary: No DVI output to 1920x1200 panel
Status: RESOLVED DUPLICATE of bug 2859
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: 6.8.0
Hardware: x86 (IA32) Linux (All)
: high critical
Assignee: Xorg Project Team
QA Contact:
Depends on:
Reported: 2004-10-13 05:53 UTC by Ronald van Engelen
Modified: 2005-09-25 09:58 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Xorg log file (35.12 KB, text/plain)
2004-10-13 05:55 UTC, Ronald van Engelen
no flags Details
xorg.conf file (16.62 KB, text/plain)
2004-10-13 05:56 UTC, Ronald van Engelen
no flags Details

Description Ronald van Engelen 2004-10-13 05:53:51 UTC
When starting X the display of a 23" Apple HD Cinema Display (new alu model)
connected to a Sapphire Radeon 9600XT AGP card on a Intel 865PERL motherboard
turns black in any resolution when using the (open source) radeon drivers.

The vesa-driver works in resolutions up to 1024x768; the panel-size is 1920x1200.
Comment 1 Ronald van Engelen 2004-10-13 05:55:27 UTC
Created attachment 1095 [details]
Xorg log file
Comment 2 Ronald van Engelen 2004-10-13 05:56:02 UTC
Created attachment 1096 [details]
xorg.conf file
Comment 3 Ronald van Engelen 2004-10-13 05:58:08 UTC
Comment on attachment 1096 [details]
xorg.conf file

Tried (un)setting both the "DisplayPriority" and "MonitorLayout"       
Comment 4 Ronald van Engelen 2004-10-14 03:05:30 UTC
Could this be a duplicate of bug #1129
Comment 5 Alan Coopersmith 2005-03-20 12:42:34 UTC
This seems to be a report against the Xorg server, not the "xserver" server,
so I'm moving to the Xorg product where it should be more visible to those who
work on Xorg.
Comment 6 T. Hood 2005-09-23 09:48:23 UTC
---Quoted from #1129---
Aha! Having discovered by accident that the DVI output did work for lower
resolutions, I found this page:


... which suggests that it's a problem with either the chipset or the monitor
not being able to handle the default 1600x1200 modeline, and gives an
alternative to use (which works fine for me in 6.8.2 without the given patch).
This solves all the problems I was having, so I'd be happy to see this resolved

I'm not sure if it'd be possible to detect an LCD being used with an rv280 and
use the alternate modelines automatically -- it sounds like that'd be hard to
make bulletproof -- but it might be worth documenting this in the radeon man page.

Thanks to all the people who've commented on this bug; hopefully the same fix
will work for others.

Submitter: Do you have the same experience?
Comment 7 T. Hood 2005-09-26 02:58:38 UTC

*** This bug has been marked as a duplicate of 2859 ***

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