Bug 13781

Summary:	xf86-video-mga 1.9.100: no dualhead with G550
Product:	xorg	Reporter:	Brice Goglin <brice.goglin>
Component:	Driver/mga	Assignee:	Tilman Sauerbeck <tilman>
Status:	RESOLVED INVALID	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	kazade
Version:	unspecified
Hardware:	Other
OS:	All
URL:	http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=448916
Whiteboard:
i915 platform:		i915 features:

Description Brice Goglin 2007-12-22 05:14:31 UTC

Reported by Mark Haber on the Debian BTS 2 months ago. His using 1.9.100 on a MGA G550 AGP (rev 01). IIRC, this is a known bug, but I didn't find any corresponding report, so here's one that won't get lost. Config and log
are available at the URL above. He says:

"I have a G550 dual head which has a proprietary connector and two
special cables with either fan out to two VGA connectors or two DVI-D
connectors. With both cables, the second screen stays dark. Even with
the analog outputs, xrandr claims that it sees two DVI outputs:

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1024
DVI1 connected 1280x1024+0+0 408mm x 306mm
   1280x1024      75.0*    59.9
   1280x960       59.9
   1152x864       75.0     74.8     69.8
   1024x768       84.9     75.1     70.1     60.0
   832x624        74.6
   800x600        84.9     72.2     75.0     60.3     56.2
   640x480        84.6     75.0     72.8     60.0
   720x400        70.1
DVI2 connected 1280x1024+0+0 408mm x 306mm
   1280x1024      75.0*    59.9
   1152x864       75.0     74.8
   1024x768       84.9     75.1     60.0
   832x624        74.6
   800x600        84.9     75.0     60.3
   640x480        75.0     60.0     59.4
   720x400        70.1

Additionally, it only wants to do 1280x1024 though both screens are
1600x1200 capable."

Comment 1 Luke Benstead 2008-10-20 03:26:14 UTC

I'm also experiencing this bug with Ubuntu Intrepid and the 1.9.100 driver compiled from source. I have the G550 with a single output that splits into 2 VGA outputs (same as the original report). 

Here is the output from xrandr:

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2560 x 1024
DVI1 connected 1280x1024+0+0 330mm x 270mm
   1600x1024      60.2  
   1280x1024      75.0     60.0*    60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8  
   1152x864       75.0     75.0     70.0     60.0  
   1024x768       75.1     75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     75.0     60.0     59.9     59.9  
   720x400        70.1     70.1  
DVI2 connected 1280x1024+0+0 330mm x 270mm
   1600x1024      60.2  
   1280x1024      75.0     60.0*    60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8  
   1152x864       75.0     75.0     70.0     60.0  
   1024x768       75.1     75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     75.0     60.0     59.9     59.9  
   720x400        70.1     70.1

Comment 2 Adam Jackson 2018-06-12 19:10:42 UTC

Mass closure: This bug has been untouched for more than six years, and is not
obviously still valid. Please reopen this bug or file a new report if you continue to experience issues with current releases.

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