Bug 21116

Summary:	radeonhd wrong identifies dvi2vga adapter as dvi-digital display
Product:	xorg	Reporter:	Vladimir <bobahu4>
Component:	Driver/radeonhd	Assignee:	Luc Verhaegen <lverhaegen>
Status:	RESOLVED WONTFIX	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Vladimir 2009-04-10 12:07:17 UTC

There is a bug, so radeonhd driver misidentifies dvi2vga adapter as dvi digital display.
Radeon hd 4850, radeonhd 1.2.5, DVI display connected to first dvi port (closest to mainboard), and dvi2vga adapter sits on second dvi port, and no displays connected to it.
When I installed radeonhd 1.2.5 (used fglrx previously), booted os and got resolution - 1152x864 (My display native resolution - 1680x1050). 
those resolutions was available for choose in gnome's resolution change app:

   1152x864       
   1024x768        
   800x600        
   640x480 

xrandr showed me this
...
Screen 0: minimum 320 x 200, current 1152 x 864, maximum 1680 x 1680
DVI-I_1/digital connected 1152x864+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1360x768       59.8  
   1152x864       60.0* 
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
DVI-I_1/analog disconnected (normal left inverted right x axis y axis)
TV_7PIN_DIN disconnected (normal left inverted right x axis y axis)
DVI-I_2/digital connected 1152x864+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1680x1050      59.9 +
   1280x1024      75.0     59.9  
   1280x960       59.9  
   1152x864       75.0     74.9* 
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
...

then I unplugged DVI2VGA, and was able to change resolution to 1680x1050

xrandr output

Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
DVI-I_1/digital disconnected (normal left inverted right x axis y axis)
DVI-I_1/analog disconnected (normal left inverted right x axis y axis)
TV_7PIN_DIN disconnected (normal left inverted right x axis y axis)
DVI-I_2/digital connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1680x1050      59.9*+
   1280x1024      75.0     59.9  
   1280x960       59.9  
   1152x864       75.0     74.9  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
DVI-I_2/analog disconnected (normal left inverted right x axis y axis)

Comment 1 Yang Zhao 2009-04-10 14:24:38 UTC

Confirmed with a Gigabyte 4850:

(II) RADEONHD(0): ATOM BIOS Rom: 
        SubsystemVendorID: 0x1458 SubsystemID: 0x21b8
        IOBaseAddress: 0xee00
        Filename: R485MCAH.F2 
        BIOS Bootup Message: GV-R485MC-1GH F2



Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1920
DVI-I_1/digital connected (normal left inverted right x axis y axis)
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
DVI-I_1/analog disconnected (normal left inverted right x axis y axis)
TV_7PIN_DIN disconnected (normal left inverted right x axis y axis)
DVI-I_2/digital connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200      60.0*+
   1600x1200      60.0     59.9  
   1400x1050      74.8     60.0  
   1280x1024      75.0     59.9     60.0  
   1280x960       60.0     59.9  
   960x1200       59.8  
   1152x864       75.0     74.9  
   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     72.8     75.0     66.7     60.0     59.9  
   720x400        70.1  
DVI-I_2/analog disconnected (normal left inverted right x axis y axis)

Comment 2 Matthias Hopf 2009-04-11 10:35:26 UTC

There is no easy solution for your issue. Though some reordering the way HDP, Sense, and DDC is used it might be possible.

Not exactly sure whether it's worth the risk of regressions, though.

Comment 3 Jeremy Huddleston Sequoia 2011-10-16 15:58:46 UTC

Does this issue occur with the preferred ati driver (xf86-vide-ati)?  If so, please move this to the Driver/Radeon component.  

Development of radeonhd has pretty much halted and development focus is on the ati driver.  Please see http://www.x.org/wiki/radeonhd

If the issue does not exist in the ati driver (or if there is no response to this message), this bug will be closed as WONTFIX unless someone contributes a patch.

Comment 4 Jeremy Huddleston Sequoia 2011-11-07 15:37:02 UTC

Closing due to lack of response.  Please reopen and move to the Driver/Radeon 
component if this issue persists with xf86-video-ati

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