How to disable one Radeon output?

[Boszormenyi Zoltan]

2016-08-29 16:07 keltezéssel, Boszormenyi Zoltan írta:
> 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.

No, it doesn't work. The secondary HDMI TV just turn itself off and I didn't notice...

>
>>
>> ...
>> 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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>
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