[Bug 34797] Radeon 7000 and HD 3450 don't work together.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34797

--- Comment #14 from Alex Deucher <agd5f at yahoo.com> 2011-02-27 16:13:15 PST ---
(In reply to comment #13)
> One other thing that might be helpful.  With PCI as primary, and those Fedora
> RHGB and Quiet kernel things off, the machine boots on the 7000's VGA.  When
> some type of DRM is loaded text appears on both monitors connected to the 3450.
>  That DRM text survives after X loads on the 7000.  So, in some kind of text
> mode, all 3 monitors have text on them.

The text on the 3450 is due to the console being started on first fb device
enumerated when the drm loads.  That's a good sign.  If you get a console on
the 3450 and X on the 7000, then both cards are initialized properly, so
appears to be a X configuration issue.  A few things to try:
1. try removing the Modes and Viewport lines from your screen sections.
2. try disabling acceleration:
Option "NoAccel" "true"
in the device sections of your xorg.conf
3. try disabling xinerama in your xorg.conf and start X with just two device
and screen sections; one for each card with busids and remove the ZaphodHeads
options.  You should get two X screens.  Something like:

Section "ServerLayout"
    Identifier     "Two cards"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" RightOf "Screen0"
EndSection

Section "Device"
    Identifier  "Card0"
    Driver      "radeon"
    BusID       "PCI:5:0:0"
EndSection

Section "Device"
    Identifier  "Card1"
    Driver      "radeon"
    BusID       "PCI:1:0:0"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "Card0"
        SubSection "Display"
        Depth     24
    EndSubSection
EndSection


Section "Screen"
    Identifier "Screen1"
    Device     "Card1"
        SubSection "Display"
        Depth     24
    EndSubSection
EndSection

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