multi head failsafe

[Carl Karsten]

Timothy S. Nelson wrote:
> On Wed, 17 Dec 2008, Carl Karsten wrote:
> 
>> I have 3 video cards:
>>
>> 01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 
>> MX/MX 400]
>> (rev b2)
>> 02:08.0 VGA compatible controller: ATI Technologies Inc Rage 128 
>> PP/PRO TMDS
>> [Xpert 128]
>> 02:09.0 VGA compatible controller: ATI Technologies Inc 210888GX 
>> [Mach64 GX]
>> (rev 03)
>>
>> I am pretty sure I had all 3 working at one point, then I did 
>> 'something' and
>> lost one.  last night I installed ubntu ibex and now I can only get 
>> the nvidia
>> one to work.  I use the extra monitors for IRC and doc files, so I 
>> don't need
>> much in the way of graphics.
>>
>> What I am hoping for is something very basic and low end that will 
>> help me
>> verify that cables are plugged in, boards are still working, etc.  And 
>> in the
>> future, help me and others troubleshoot.
> 
>     If it locks or doesn't run at that point, you're probably running 
> into this bug:
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=18160
> 
>     (I noticed your log finishes with "initializing int10", which is 
> what mine finished with when I ran into this bug).
> 
>     The cause is that, at a certain point, Xorg got rid of its inbuilt 
> PCI handling code, and has been relying on the kernel PCI code.  
> Unfortunately, there's been a bug in the Xorg code, and a bug in the 
> kernel as well.  Either Alex Villacis-Lasso (excuse lack of diacritics) 
> will fix it, or my book on PCI architecture will arrive, and I'll give 
> it a go myself (but it may be beyond me).
> 
>     The workaround is to downgrade to an older version of Xorg.  I 
> forget what version worked, but IIRC, it worked in Fedora 8, but not 
> Fedora 9 (I went straight from Fedora 6 to Fedora 10 myself, so I'm 
> unsure).
> 
>     HTH some.
> 

This helps alot - I know to stop messing with my config and start downgradeing. 
thankyou very much.

Carl K