Date: Tue, 04 Aug 1998 17:07:02 -0700 From: Mike Smith <mike@smith.net.au> To: Brian Somers <brian@Awfulhak.org> Cc: Greg Lehey <grog@lemis.com>, Randy Philipp <cphilipp@pop500.gsfc.nasa.gov>, Doug White <dwhite@resnet.uoregon.edu>, freebsd-mobile@FreeBSD.ORG Subject: Re: Neomagic chipset - is it a hardware problem ? Message-ID: <199808050007.RAA00546@dingo.cdrom.com> In-Reply-To: Your message of "Tue, 04 Aug 1998 23:12:12 BST." <199808042212.XAA24500@awfulhak.org>
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> [.....] > > > Has anyone else seen this problem ? I'm pretty much convinced that > > > it's a hardware problem now, so I'll probably return the machine > > > (second time) nearer the end of the week. > > > > I don't know too much about laptop displays, but if that were to > > happen on a glass monitor, I'd guess you're driving it out of spec. I > > know you can fry monitors; maybe you can fry laptop displays. In your > > position I'd seriously consider reviewing the display parameters. > > The display (frequency) parameters seem to be pretty much redundant > for LCDs. I can make up any clock line, and pair it up with a > modeline that says > > "800x600" anything 800 anything 600 anything > > and it'll behave exactly the same. This makes sense as there's no > ``beam'' to give orders to on an LCD..... you just have to switch > modes and colour the pixels - the rest is beyond software control. This is more likely actually due to the driver talking to the LCD and completely ignoring you. On older systems where it wasn't possible to quiz the panel for its parameters, it was possible to screw things up fairly impressively... -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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