On 2015-04-23 Thu 08:11 AM |, Nick Holland wrote: > On 04/23/15 04:34, Craig Skinner wrote: > > I haven't seen this in a while (and I'm trusting my memory more than I > should), but on some older systems, back in the day of monochrome VGA > monitors, the monochrome monitor only connected to the green video line. > If the card saw no load on the red and blue lines, it would assume a > monochrome monitor, and operate in monochrome mode only. > > I do recall having soldered a few 75ohm resistors in a mechanical KVM > switch box to persuade the video card that there really was a monitor > attached when there wasn't.
Smart thinking. > > No idea if that could be reset in software. And it's been a loong time > since I've seen (or noticed?) this behavior, so I suspect it isn't a > common issue now. To be honest, I can't say if it is due to modern > video cards being different, modern KVM boxes being smarter, the almost > complete elimination of monochrome monitors, or the fact that when I run > text, I don't care about color. > > > Is the kernel behaviour different on boot with/without a monitor > > present? > > On new DRM capable cards, yes. > > And, looking at your dmesg ... oh wait, you haven't provided us one. > http://marc.info/?l=openbsd-misc&m=142952516106084&w=2 Thanks. -- A bachelor is a selfish, undeserving guy who has cheated some woman out of a divorce. -- Don Quinn
