How to disable one Radeon output?

[Boszormenyi Zoltan]

2016-08-29 13:35 keltezéssel, Boszormenyi Zoltan írta:
> Hi,
>
> I have a small Kabini base mini PC that has a primary DisplayPort-0
> output and a secondary HDMI-0 output.
>
> I would like to have a configuration where only the primary is used
> no matter if there's a monitor attached to the secondary.
> (Don't ask, business requirements.)
>
> No matter how I try, the secondary monitor output is the clone
> of the primary.
>
> Is there a way to disable a specific Radeon output from xorg.conf?
>
> Here's a configuration below that should work but doesn't.
>
> The same method works for the Intel driver: explicitly reference
> the to-be-disabled ZaphodHead in a Device section, a Screen section
> in turn references this Device section and then leaving the second
> Screen out of the ServerLayout section give the desired result,
> X leaves the unwanted output in terminal mode.

Answering to myself. Adding "Screen n" to individual Device section
does what I need. Strange that the driver doesn't pick this up from
the Screen section setup.

>
> ...
> Section "Device"
>     Identifier    "RADEON"
>     Driver        "radeon"
>     BusID        "PCI:0:1:0"
Screen 0
>     Option        "AutoServerLayout" "on"
>     Option        "ZaphodHeads" "DisplayPort-0"
>     Option        "Monitor-DisplayPort-0" "DisplayPort-0"
>     Option        "TearFree" "on"
>     Option          "DRI"    "3"
> EndSection
>
> Section "Device"
>     Identifier    "RADEON1"
>     Driver        "radeon"
>     BusID        "PCI:0:1:0"
Screen 1
>     Option        "AutoServerLayout" "on"
>     Option        "ZaphodHeads" "HDMI-0"
>     Option        "Monitor-HDMI-0" "HDMI-0"
>     Option        "TearFree" "on"
>     Option          "DRI"    "3"
> EndSection
> ...
>
> Thanks in advance,
> Zoltán Böszörményi
>
>
>
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