<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 3, 2019 at 5:21 AM Andrew Stadt <<a href="mailto:acstadt@stadt.ca">acstadt@stadt.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div class="gmail-m_9158985369608910133moz-cite-prefix">On 2019-03-02 11:42 p.m., Allen Edwards
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<div>I think the problem is that I misread the
specification on the projector. While it says
that it does 1080p, the maximum data rate is
1280x720 so the 1080p must be with an analog
input. Same with the monitor. It has a native
resolution of 1280 x 1024. Per the
recommendation of everyone here, I set the TV up
from my initial setup of 1280x720 to 1920x1280
when I upgraded to Mythbuntu-16.</div>
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<div>Option "metamodes" "VGA-0:
nvidia-auto-select +0+0, HDMI-0: 1920x1080
+1280+0"</div>
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<div>When I was running Mythbuntu-8 which drove
the projector and the TV just fine, I had
everything set to 1280x720 as that is all the
TV signal is anyway.</div>
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<div>So now I have to decide if I want to use
the TV at 1920x1080 or downres so I can use
the projector a few times a year or find some
way to have the computer auto detect without
turning the TV black. I believe there was also
an issue with the Sony sending bad EDID data.
I just read something about auto detecting
1360x768 instead of something useful. Might
be a different model but I recall there was an
issue. Maybe there is a way to have X pick
between 1280x720 and 1920x1024???</div>
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<div>The video card is "GeForce GTX 750 Ti"</div>
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<div>Well, I think I am at least understanding
why it doesn't work.</div>
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<div>Allen</div>
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<p>I don't think I ever set up a frontend where I hadn't had to
tweak the xorg.conf for the specific screen ( monitor, tv,
projector, etc ) at least a little ( ok, the Android frontend on
my Shield went surprisingly easy ).</p>
<p>Whether it be dealing with overscan, underscan, adjusting mode
lines for some specific resolutions/frame rates, or dealing with
an older xorg that couldn't handle the device not being there when
it came out of suspension, bad EDIDs, etc.</p>
<p>The issue is that these adjustments are generally specific to
that device and don't just work for all of them.</p>
<p>For one of my frontends, which has a primary output device (TV),
and a secondary I only use a few times a year (Projector), I ended
up creating an xorg.conf which has two SERVERLAYOUT sections, each
of those two sections specify their own DEVICE, SCREEN and MONITOR
sections.</p>
<p>Most of the time, my frontend auto logs in the myth user, and
automatically starts "startx --layout TV". For the couple times a
year I use the projector, I logout then, log in manually, and
"startx --layout PROJECTOR".</p>
<p>FWIW: I tweaked the xorg.conf for the separate devices
individually, till I had everything the way I wanted it for that
output device, and then combined them, makes testing a lot easier
as well.</p>
<p>Of course none of this solves your immediate issue, just a
suggestion on how you can run both configs going forward when you
do get it working. Stephan Worthington already gave some pretty
good advice in that category.</p>
<p>Andrew.</p></div></blockquote><div>Let me explain what I did for the last decade. I had a VGA display which is a small Samsung monitor. For the other I had a 1080x720 output to a DVI splitter which went to the TV and the Projector. The splitter faked the HDCP data so that a source like a DVD player thought there was only one device connected. I would play whatever I wanted and it would show up on whichever display was on. That was on Mythbuntu8 with an old slow video card but it worked fine. That system died. There was no problem having the same setting for both the TV and the Projector and in fact Myth had no idea there were two displays connected to the single DVI port. This DVI splitter was quite expensive and violated the HDCP standard, which is why it worked. I originally bought it so that my new DVD player would work with my old projector that had no HDCP so without this device, I could no longer watch DVDs once my old DVD player died. That projector died and I bought the Panasonic. Point is, Myth worked fine with a single setup and two displays on the DVI port and one on the RGB port.</div><div><br></div><div>New system is Mythbuntu 16 and the video old card is too slow. I got lots of tearing. Big step backward. A friend gave me the 750 ti card and now I am using HDMI and get digital sound into the TV. Can't go back to the old setup because in the process of doing something I fried the audio decoder I was using to get audio to the TV. Anyway, I am happy with the hdmi into the TV so that is good.</div><div><br></div><div>That is the history. The goal now is to be able to unplug the TV and plug in the Projector and have it work. The obvious solution is to change</div><div><div> Option "metamodes" "VGA-0: nvidia-auto-select +0+0, HDMI-0: 1920x1080 +1280+0"</div></div><div>to <br></div><div> Option "metamodes" "VGA-0: nvidia-auto-select +0+0, HDMI-0: 1280x720 +1280+0"<br></div><div><br></div><div>It is not at all clear to me what benefit I am getting from using 1920x1080 on 1280x720 source material but someone on this list convinced me to do it that way and it works well so I would prefer not to change.</div><div><br></div><div>What I wonder is, would X figure it out if I did something like this?</div><div><div>Option "metamodes" "VGA-0: nvidia-auto-select +0+0, HDMI-0: 1280x720, 1920x1080 +1280+0"</div></div><div>or maybe it has to be this</div><div>Option "metamodes" "VGA-0: nvidia-auto-select +0+0, HDMI-0: 1920x1080,1280x720 +1280+0" </div><div><br></div><div>Allen</div><div><br></div><div><br></div><div> </div></div></div></div></div></div>