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 waltd...@waltdnes.org
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.
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, waltd...@waltdnes.org 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
