----Original Message---- From: Camaleón [mailto:[email protected]] Sent: Friday, October 08, 2010 9:23 AM To: [email protected] Subject: Re: Monitor detection failure and video display
> On Thu, 07 Oct 2010 11:58:51 -0800, James Zuelow wrote: > >> Some additional info. >> >> I tried this: >> >> Section "Device" >> Identifier "Device0" >> Driver "nouveau" >> Option "IgnoreEDID" "true" >> EndSection >> >> But I get this in /var/log/Xorg.0.log (actually I get that error if >> the IgnoreEDID is there or not): > > Mmm, I don't think that should be the proper way to handle that > (unless you know for sure that EDID information is completey broken > with your monitor and you are then forced to disabled it). No, you're right. I was way off, thinking it was xorg failing to get EDID info from a monitor that was causing the video to go blank. I was just playing with this and it turns out it was pretty simple. With the new 2.6.32 kernel in Squeeze, KMS is turned on. KMS attempts to autodetect a monitor, and if it doesn't find one video goes blank. The way around this is to override KMS with the video= boot parameter. So I modified /etc/default/grub and changed the boot options from "quiet" to "quiet video=VGA-1:e" The "video=VGA-1:e" tells the kernel to enable VGA-1 regardless of what it sees. Then xorg will start. It still won't get EDID info if the monitor is powered off, but I can set a specific mode for the monitor which seems to work. I have an image I use for kiosks, so after applying the image to a computer I have to tweak the video= kernel option for each one, but that's not really an issue as I have to tweak the xorg.conf mode setting for each monitor anyway. It is just a matter of figuring out which video setting to use, VGA-1 for the VGA ports, or DVI-I-1 for a DVI port. I can't find the code for an S-Video output, which is really handy for display kiosks using a large screen TV as a display unit (especially cause you can push an s-video signal over a 50 or 100 foot cable). If I wanted to, I could set the display setting in the kernel command line as in "video=VGA-1:1920x1...@52e" This would set the display to 1920x1080 at 52Hz refresh. I might need to do that with some of the bigscreen TV's, and probably have to do that for anything going over the S-video port if the xorg.conf modeline doesn't work for some reason. Anyway, it is working now, and this should be enough info to get people going on a Google search if they're in the same boat. James Z -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/4a09477d575c2c4b86497161427dd94c15b0d1f...@city-exchange07
