[RndTbl] How Long Can HDMI Cable be Run? -- Blue Jeans Cable

[John Lange]

The place I usually go for cables is monoprice.com. They don't mention the
HDMI certification level on any of the cables that I randomly clicked on,
but they do clearly state "supports 4K @60Hz" on some of them.
Unfortunately there is no way to filter only the cables in that category.
The information is hidden in the description so you have to click them
one-by-one.

Interestingly, it also appears that long HDMI cable lengths are possible
(100+ feet) because the cable makes appear to be embedding some kind of
extender chip into the cables themselves.

John

On Wed, Sep 9, 2015 at 2:01 PM, Trevor Cordes <trevor at tecnopolis.ca> wrote:

> Worse still, after spending another 2 hours looking into it last night,
> I found that it is incredibly hard to tell what cables are what.  Sites
> say that legally speaking, the HDMI group doesn't let cable vendors
> label their cables as "1.4" or "2.0".  They are only allowed to say
> "High Speed HDMI", which is near useless in telling you anything.
>
> It turns out that it's not just rez but refresh that has to be factored
> into your cable purchase.  I guess that's a holdover from HDMI's TV
> focus.  TV's are fine with 30fps.  Most computer people need 60fps.
>
> For instance, you *need* HDMI 2.0 to do 4k at 60.  But they can't label
> their cable as "2.0", so WTF are you supposed to do?
>
> I talked with my reseller rep at Startech and they said none of their
> HDMI cables are 2.0 even though they loudly exclaim "ultra hd!" and
> "4k!".  He said they are all HDMI 1.4 or 4k at 30.  Luckily 1.4 will also
> do my required 2560x1440 at 60, so in my case 1.4 is good enough.
> However, if I was super bleeding edge I'd be getting a 4k monitor and
> then be stuck having to find a 2.0 cable amongst these wacky labeling
> rules.
>
> C2G's HDMI cables claim to do 4k at 60, so there's a safe option... unless
> they are lying!
>
> P.S. Michael is almost certainly right when he said at the meeting that
> you have to manually add the 2560x1440 rez into xrandr once you have
> the correct components in place.
>
> P.P.S. It looks like 2560x1440 is doable with HDMI, just with so many
> caveats most people can't get it working and switch to DP.  I've picked
> out a cable and a new inexpensive VC that should allow me to get this
> working.  (And vdpau, which I've wanted for a while...)  I will report
> back in a few weeks.
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-- 
John Lange
www.johnlange.ca
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