[Intel-gfx] Question about driver capatibilities - triple monitor?

[Daniel Vetter]

tbh I have no idea whether you can actually by hw which supports 2x DP
out, it's certainly no common. The description was only from the hw
pov. It might be that the 2x thunderbolt works, otoh I've never tested
thunderbolt so I have no idea how well (or if at all) the pcie + dp
muxing works with our driver. Maybe the easiest way is to shoot for a
board with 2x HDMI or DP in total, since you can always use a passive
HDMI->DP dongle to drive the DP port in HDMI mode. But even just
finding boards with 3x digital output seems to be hard.
-Daniel

On Wed, Jan 23, 2013 at 12:46 PM, "Kristóf, Csillag"
<csillag.kristof at gmail.com> wrote:
> At 2013-01-22 09:43, Daniel Vetter wrote:
>>
>> For your 3 monitor required a decen ivb based board should be good
>> enough, as long as you keep the restriction in mind that 2 of them
>> need to have the same dotclock (which in practice boils down to either
>> 2x DP monitors or 2x identical monitors with the same type of
>> connector).
>> -Daniel
>
> I'm still not clear on the details how to achieve this.
>
> 1. Option 1: "2x DP monitors"
>
> How do I connect 2x DP monitors?
>
> 1a) I can not find any motherboards with more than one display port. Can
> you?
>
> 1b) Or do you mean using Thunderbolt instead one of the DisplayPort ports?
>
>
> In this case I need 1 Thunderbolt + 1 DisplayPort + 1 Something else?
>
> The only motherboard I know of with this configuration is the ASUS P8Z77-V
> Premium - which costs ~ 550 USD.
> Can you recommend any other?
>
> 1c) Or do you mean using 2x (Thunderbolt -> Displayport) + something else.
>
> I know about 2 dual-thunderbolt motherboards, all by GIGABYTE: GA-Z77X-UP4
> TH,  GA-Z77X-UP5 TH, GA-Z77MX-D3H TH.
>
> Did you mean these?
>
>
> 1c) Or do you mean achieving 2 DP by splitting a DP with a splitter like I
> mentioned?
>
> Does this mean that any mobo with a DP should work? Take for example the
> Intel DQ77KB thin Mini-ITX board.
> Can I split the DP into 2, and then connect 2 monitors via them, and add a
> third one with HDMI?
>
> Option 2: "2x identical monitors with the same type of connector"
>
> What does "identical monitor" mean here? Is same resolution/freq enough, or
> do we really need the same model?
>
> For example, consider any of the GIGABYTE GA-B75N, GA-H77N-WIFI,
> GA-Z77N-WIFI models.They all have 2 HDMI + 1 DVI output.
> Does that mean that if I connect two identical monitors to the HDMI ports,
> and a different one on the DVI port, and it should just work?
>
>    * * *
>
> Sorry for being persistent; I would really like to understand my options
> here.
>
> (I intend to make a purchase based on the information, and I really can't
> afford to be wrong...)
>
> Thank you:
>
>    Kristof
>
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch