[GRLUG] VGA / video question

[John-Thomas Richards]

On Sun, Mar 22, 2015 at 08:21:50PM -0400, John-Thomas Richards wrote:
> On Sun, Mar 22, 2015 at 05:23:23PM -0400, Mike Miller wrote:
> > > From: jtr at jrichards.org
> > > This is not strictly Linux-related so please indulge me.
> > > 
> > > We bought a couple 65" TVs (cheaper than a projector/screen) for Sunday
> > > morning worship services (lyric projection, etc.). I have a laptop with
> > > Ubuntu running OpenLP (open source lyric projection). The TVs do not
> > > have a VGA connector and the laptop only has a VGA connector. I bought
> > > two VGA->HDMI adapters. When I connect the laptop to this with a short
> > > VGA cable (~6') I get full 1920x1080. This runs through a 4-port VGA
> > > video splitter, also with a ~6' cable. Works as it should. However, when
> > > I connect a 75' video cable from the laptop to the splitter Ubuntu only
> > > wants 1024x768 (verified via 'xrandr -q' on the CLI). This seems like a
> > > loss of video signal. Would a VGA signal booster eliminate this? I don't
> > > want to spend more money without being sure. This seems plain to me, but
> > > I want to make sure I am not missing anything.
> > > 
> > This is Mike from Brightside Church.  Your problem is that hdmi
> > doesn't travel over 50 feet without an amplifier.  We tried to do the
> > same thing with the same results.  
> > What we ended up doing was to convert the signal with a hdmi to cat5
> > adapter  and then back again at the projector. 
> 
> The HDMI portion is just six feet. If I boost the signal over the
> longest distance (from the laptop to the VGA splitter) will this work?

That is, over the VGA portion.
-- 
john-thomas
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As scarce as truth is, the supply has always been in excess of the
demand.
Josh Billings