Return to BSD News archive
Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!nntp.coast.net!chi-news.cic.net!newsfeed.internetmci.com!in1.uu.net!zib-berlin.de!news.tu-chemnitz.de!irz401!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: XFree312 doesn't restore text mode Date: 23 Dec 1995 14:50:22 GMT Organization: Private BSD site, Dresden Lines: 35 Message-ID: <4bh4ve$naq@uriah.heep.sax.de> References: <4bbggc$ndq@gemini.coi.pw.edu.pl> <4bc1cf$phk@gemini.coi.pw.edu.pl> <4bc4op$pud@gemini.coi.pw.edu.pl> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.3 gjb@ogg.ii.pw.edu.pl (Grzegorz J. Blinowski) writes: > The problem seems to be related to the sc0 driver, it reports > sc0: .. VGA MONO .. early during the boot phase, > a quick peek into the source code, reveals that > the VGA type detection is automatic (I may be wrong here) > So why the VGA type is incorrectly determined ??? Since your VGA misdetects your monitor as a monochrome one. This happens for example for some monitors that are attempting to automatically determine whether the input signal is on the BNC or the VGA connector. While there is no input signal at all (e.g. after a hardware reset), they toggle every few seconds between both input sources until a signal is found. If the VGA's monitor probe happens just in the moment where the monitor was looking at the wrong input source, the VGA fails to ``see'' the monitor ID pins, and silently assumes a monochrome monitor. Another combination where i found such a misbehaviour was a monitor with power management. On each hardware reset, both sync signals drop at the monitor's input, so the monitor decides to go to bed. This caused the monitor to turn its power supply off, and therefore also to remove the power from the monitor ID pins. Same as above, the VGA detected a ``monochhrome'' monitor in 8 out of 10 attempts. (Btw., the latter example was nothing less than a deluxe HP Netserver!) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)