On Mon, Aug 29, 2016 at 5:50 PM, James Cameron <qu...@laptop.org> wrote:
> Only tested one monitor? Try another; the EDID communication path > over VGA could have problems, or the data in monitor Flash unusual. > I tried a different brand of LCD monitor, and the problem remains: 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). 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!) 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. Also check age of monitor. Mix not old and new wineskins. > The earlier test monitor's from the prior decade it's true, but this newer test from a much more recent vintage ;) -- > James Cameron > http://quozl.netrek.org/ > _______________________________________________ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel > > -- > <http://lists.laptop.org/listinfo/server-devel> > <http://lists.laptop.org/listinfo/server-devel> > Unsung Heroes of OLPC, interviewed live @ > <http://lists.laptop.org/listinfo/server-devel>http://unleashkids.org ! >
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