<div dir="ltr">On Mon, Aug 29, 2016 at 5:50 PM, James Cameron <span dir="ltr"><<a href="mailto:quozl@laptop.org" target="_blank">quozl@laptop.org</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Only tested one monitor? Try another; the EDID communication path<br>
over VGA could have problems, or the data in monitor Flash unusual.<br></blockquote><div> <br></div><div>I tried a different brand of LCD monitor, and the problem remains:<br><br>Fedora 22 NUC allows re-attaching of the VGA cable every time, whereas both CentOS NUC's are highly intermittent (the VGA cable fails to show any video upon re-attachment, the vast majority of the time).<br><br>In hindsight, the other LCD monitor (tested across all 3 NUC's) behaves very much the same way. Perhaps 10% of the time (or less) video re-appears, sometimes triggered by starting/leaving X Windows using Ctrl-Alt-F1 or Ctrl-Alt-F2 (or running "reboot" from ssh, on any machine that was running X Windows at the time, causing video to suddenly re-appear during the shutdown process) but regrettably on both CentOS 7 NUC's (NUC6i3SYH & D34010WYKH) I haven't found any repeatable pattern that permits video to be usefully restored (without a full reboot!)<br><br>PS Problem occurs independent of CentOS 7 NUC's that are running X Windows and those that are not. I mention X Windows only because leaving X / re-entering X seems to (sometimes) facilitate recovery of the video signal in certain not-quite-repeatable situations.<br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Also check age of monitor. Mix not old and new wineskins.<br></blockquote><div><br></div><div>The earlier test monitor's from the prior decade it's true, but this newer test from a much more recent vintage ;) <br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<span class=""><font color="#888888">--<br>
James Cameron<br>
<a href="http://quozl.netrek.org/" rel="noreferrer" target="_blank">http://quozl.netrek.org/</a><br>
______________________________<wbr>_________________<br>
Server-devel mailing list<br>
<a href="mailto:Server-devel@lists.laptop.org">Server-devel@lists.laptop.org</a><br>
<a href="http://lists.laptop.org/listinfo/server-devel" rel="noreferrer" target="_blank">http://lists.laptop.org/<wbr>listinfo/server-devel<br clear="all"><br>-- <br></a><div class="gmail_signature" data-smartmail="gmail_signature"><a href="http://lists.laptop.org/listinfo/server-devel" rel="noreferrer" target="_blank"></a><div dir="ltr"><a href="http://lists.laptop.org/listinfo/server-devel" rel="noreferrer" target="_blank">Unsung Heroes of OLPC, interviewed live @ </a><a href="http://unleashkids.org" target="_blank">http://unleashkids.org</a> !</div></div>
</font></span></blockquote></div></div><font color="#888888">
</font></div>