Date: Wed, 27 Jan 1999 06:40:01 -0800 From: Mike Smith <mike@smith.net.au> To: SXren Schmidt <sos@freebsd.dk> Cc: mike@smith.net.au (Mike Smith), dillon@apollo.backplane.com, hackers@FreeBSD.ORG Subject: Re: Any way to get machine out of hires when it breaks into DDB> ? Message-ID: <199901271440.GAA24042@dingo.cdrom.com> In-Reply-To: Your message of "Wed, 27 Jan 1999 08:46:17 %2B0100." <199901270746.IAA33993@freebsd.dk>
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> It seems Mike Smith wrote: > > > > > > It sure wouuld be nice if DDB could restore the video back to VGA. > > > Anybody have any ideas? > > > > Please search the archives for discussions of this. The short answer > > is "it can't be done". > > Erhm, well, it CAN be done, but not easily. > > I have started on a X server that uses libvgl as the underlying graphics > "glue". Since libvgl can (well my local version) use the BIOS to switch > to hires VESA modes, the kernel "knows" how to get out of graphics mode > when something bad happens. > However you can be screwed so bad that even this doesn't work. > The other downside is that such an Xserver redefines slow... This is what QNX do with their Photon micro-GUI; they use the VESA BIOS and then the linear framebuffer mode that most cards have. It's not what you'd call "accelerated", but for a lot of things it's more than adequate. If you're going to do it that way, it does indeed become possible, yes. -- \\ 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-hackers" in the body of the message
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