[Bug 13557] New: radeon: incorrect crtc for external LCD on VGA-0

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Dec 7 00:05:50 PST 2007


           Summary: radeon: incorrect crtc for external LCD on VGA-0
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: solca at guug.org
         QAContact: xorg-team at lists.x.org

Video card on x86 laptop:                                                       

ATI Technologies Inc Radeon R250 [Mobility FireGL 9000] (rev 02)                

I used to have an old external CRT monitor attached to the VGA-0                
connector and the command `xrand --output LVDS --off` would                     
correctly turn off the laptop's LCD so I can work in the external               
without having both monitors powered-on.                                        

Problem now is that I buy a new external LCD monitor and the                    
above command would turn off both the new LCD and the laptop's                  

But when `xrandr --output VGA-0 --crtc 0` everything works as                   
expected so I pressume is a bug in the crtc detection when a                    
LCD is attached in the VGA-0 connector both monitors are driven                 
by the same crtc.  As I said, plugging the CRT monitor doesn't                  
exhibit this problem.                                                           

Running latest Debian Sid (X Server 1.4.0) and git radeon driver.

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