[ltp] Re: Which Thinkpads easiest to display on external HDMI?

[linux-thinkpad@linux-thinkpad.org]

Hi Guys-

I wanted to post back to confirm that you guys were correct- I only neede=
d
to "trigger external display detection" for the HDMI cable adapter to wor=
k
with my T520 (without discrete graphics).

In fact, I didn't even need to invoke xrandr- in my case it was just a
matter of sequence. By turning on the TV, plugging in the
DisplayPort-to-DHDMI cable, then booting the laptop, it immediately
worked.

I will need to learn how to then control the resolution, but that's a
subject for a future post.

Thanks for your help!

Keith Ostertag


>
> From: Micha Feigin
> </pre>
>       <blockquote type=3D"cite">
>         <pre wrap=3D"">
> </pre>
>       </blockquote>
>       <pre wrap=3D"">
> </pre>
>       <blockquote type=3D"cite">
>         <pre wrap=3D"">    Not sure about the hardware in the thinkpad.=
 I
> would think that it
>     would have a dual purpose displayport / hdmi port, but if it
>     doesn't, you can get an active displayport to hdmi, would be cheape=
r
>     than another laptop. &lt;br&gt;
> </pre>
>       </blockquote>
>       <pre wrap=3D"">
> Hmmm... I'll study that a bit. But I assume that in my T520. there is n=
o
> physical connection of the DisplayPort to anything...</pre>
>     </blockquote>
>     There is no sense in that. It has to be connected to something, if
>     you have intel only then it is connected to the Intel. I had the
>     w520 with NVIDIA at the time, and it was more messed up as it was
>     stilled connected to the Intel, but the xserver went crazy when I
>     connected a cable and would only work when the bios was set to
>     discrete graphics.<br>
>     <br>
>     The question is more whether the hardware will output both
>     displayport and hdmi signals (which are different) which would allo=
w
>     using a passive displayport to hdmi cable, or whether hardware is
>     displayport only, which would require an active cable (less likely,
>     more common in discrete desktop graphic cards).<br>
>     <br>
>     My guess is that either the adapter is faulty or you need to trigge=
r
>     external display detection, as opposed to the port not being
>     connected to anything or a displayport only port.<br>
>     <blockquote
> cite=3D"mid:fe797aa9f88fd6120ec0c19d94accb31.squirrel@webmail.strucktow=
er.com"
>       type=3D"cite">
>       <pre wrap=3D"">
>
> ThinkWiki says:
>
> "The T520 also requires Discrete Graphics to use DisplayPort. "
>
> Thanks,
> Keith
>
> </pre>
>     </blockquote>
>     <br>
>   </body>
> </html>
>
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