Re: CRTs and EDID (was: Re: [gentoo-user] Anybody want to beta test Gentoo with mdev instead of udev?
On 11/16/2011 06:20 PM, waltd...@waltdnes.org wrote: > On Tue, Nov 15, 2011 at 09:53:47AM -0500, Michael Mol wrote > >> Just an FYI, EDID blocks have been part of CRT tech since the mid to >> late 90s; it's the basis of "plug & play" monitors. >> >> IIRC, the EDID block is transported via DDC, which is essentially I2C >> implemented on top of your VGA cable. I've got three EDID-supporting, >> 19" 1600x1200 CRTs staring me in the face right now. >> >> https://plus.google.com/108080062547354628132/posts/ZLLw66eL4We > Maybe X has learned how to read them without udev's help. The xorg > logfile shows the EDID block, max/min horizontal/vertical scan rates, > supported modes, etc. > Xorg's been around since 2004, and udev since 2003, so it's possible that it's depended on udev for displays. It seems unlikely, though; I remember XFree86 4.x having EDID support, just prior to people migrating over to Xorg. It was a royal pain, actually; my Thinkpad 760XL's LVDA (I think it was LVDA. It wasn't a common laptop video connection yet) display didn't support EDID, and I never did manage to get any version of XFree86 newer than 3.3.6 working on it. Point is, Xorg autoconfiguration has worked find for *most* setups for almost a decade. At the very least, it's worked fine since the first graphical Knoppix and Ubuntu live CDs.
Re: CRTs and EDID (was: Re: [gentoo-user] Anybody want to beta test Gentoo with mdev instead of udev?
On Tue, Nov 15, 2011 at 09:53:47AM -0500, Michael Mol wrote > Just an FYI, EDID blocks have been part of CRT tech since the mid to > late 90s; it's the basis of "plug & play" monitors. > > IIRC, the EDID block is transported via DDC, which is essentially I2C > implemented on top of your VGA cable. I've got three EDID-supporting, > 19" 1600x1200 CRTs staring me in the face right now. > > https://plus.google.com/108080062547354628132/posts/ZLLw66eL4We Maybe X has learned how to read them without udev's help. The xorg logfile shows the EDID block, max/min horizontal/vertical scan rates, supported modes, etc. -- Walter Dnes
CRTs and EDID (was: Re: [gentoo-user] Anybody want to beta test Gentoo with mdev instead of udev?
On Tue, Nov 15, 2011 at 1:21 AM, wrote: > Contrary to the FUD I've heard, X works just fine, thank you, without an > xorg.conf. Modern flatscreens with EDID info are set up automatically. I > suppose that old CRT monitors without EDID info might require xorg.conf, > but that's "exotic hardware" nowadays. Just an FYI, EDID blocks have been part of CRT tech since the mid to late 90s; it's the basis of "plug & play" monitors. IIRC, the EDID block is transported via DDC, which is essentially I2C implemented on top of your VGA cable. I've got three EDID-supporting, 19" 1600x1200 CRTs staring me in the face right now. https://plus.google.com/108080062547354628132/posts/ZLLw66eL4We -- :wq
