triple head: xrandr commands ignored

[Alex Deucher]

On Fri, Apr 28, 2017 at 9:29 PM, Felix Miata <mrmazda at earthlink.net> wrote:
> Alex Deucher composed on 2017-04-28 15:15 (UTC-0400):
>
>> Felix Miata wrote:
>
>> All evergreen cards only have 2 PLLs so that means they can only
>> support two independent clocks.  If you want to use more than two
>> displays, you'll need to use displayport or for non-displayport, at
>> least two of the displays need to be using the exact same display
>> timing.
>
> Thanks! Is PLL count information that is readily available in Xorg.0.log,
> gfxinfo, dmesg or elsewhere? Is this nv218/GT210 similarly limited?
> http://fm.no-ip.com/Tmp/Linux/Xorg/hwinfo-gfx-geforce710-gt218-fi965.txt

See the display section of this page for more info on the display
capabilities on various radeon chips:
https://www.x.org/wiki/RadeonFeature/
No idea about nvidia hw.

Alex

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