Bug 24095

Summary: r600: dual head not working with KMS enabled
Product: xorg Reporter: Casey Jones <jonescaseyb>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED INVALID QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: hramrach
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Xorg log
none
dmesg
none
xorg.conf
none
xrandr output
none
Real xorg.log none

Description Casey Jones 2009-09-22 15:21:47 UTC 
Hello,

I have a Radeon 4850, and I'm using the drm-next branch of airlied's kernel sources.  I have mesa, xf86-video-ati, and libdrm from git.

I have two monitors.  The screen on the right is 1680x1050 (DVI-1), and the one on the left is 1280x1024 (DVI-0).  When I use KMS it only uses one screen, which by default is the smaller, left screen.  If I disable KMS everything works fine.  Xrandr sees both screens, and shows the correct modes.  If I do: xrandr --output DVI-1 --mode 1680x1050 it changes the mode on DVI-0 to 1680x1050 instead of DVI-1 even though the mode is too large to fit that screen.

I am attaching my dmesg, Xorg.0.log, and my xorg.conf
Comment 1 Casey Jones 2009-09-22 15:22:17 UTC 
Created attachment 29775 [details] [review]
Xorg log
Comment 2 Casey Jones 2009-09-22 15:22:34 UTC 
Created attachment 29776 [details] [review]
dmesg
Comment 3 Casey Jones 2009-09-22 15:22:53 UTC 
Created attachment 29777 [details] [review]
xorg.conf
Comment 4 Casey Jones 2009-09-22 15:26:25 UTC 
Created attachment 29778 [details] [review]
xrandr output

I'll toss in my xrandr output so you can see what it's doing.
Comment 5 Alex Deucher 2009-09-22 15:28:43 UTC 
looks like you attached your dmesg twice instead of your xorg log.
Comment 6 Alex Deucher 2009-09-22 15:30:54 UTC 
The outputs are enumerated in the opposite order with kms which needs to be fixed. So DVI-0 (non-kms) is DVI-1 (kms).
Comment 7 Casey Jones 2009-09-22 15:41:12 UTC 
Created attachment 29779 [details]
Real xorg.log
Comment 8 Casey Jones 2009-10-07 20:17:58 UTC 
Some progress has been made on this bug.

I tested KMS again tonight, and both screens display now instead of just one.  However, the screens are still backwards.

I think if I switch the dvi connections around on the card, it would be layed out the right way.  Last time I tested it it switched the displays around, but only one screen would display at a time then.

Completely seperate issue, but I'm getting like 4-bit color on X.
Comment 9 Alex Deucher 2010-10-19 17:54:14 UTC 
Is this still and issue with a newer kernel?
Comment 10 Adam Jackson 2018-06-12 19:06:07 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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