On 7/12/07, Phil Meyer <pmeyer@xxxxxxxxxxxxxxxx> wrote: > Valent Turkovic wrote: > > Hi. > > > > I have Fedora Core 6 and by default it choose i810 driver for X for my > > Intel 915 chip. > > With i810 driver I had no problem using only my laptop screen - but when > > I connected external 19" screen all hell broke loose :) to be a bit > > poetic. or more to the point: > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=238747 > > > > In my comment #8 you can see that I changed to intel driver, but even > > that still doesn't work like I expect. > > > > I need my external monitor running at it's full resolution of > > 1280x1024 and desktop also at that resolution. I got desktop running > > with 1280x1024 but only on a 1024x768 screen resolution > > It is probably not the driver, but your external monitor that has a problem. > > One of the things that most of the current video drivers do is ask the > monitor for its EDID. In this data, the monitor reports its max > Horizontal avd Vertical scan rates. Look in /var/log/Xorg.0.log for > EDID. Here is an example: > > (II) VESA(0): Year: 2006 Week: 0 > (II) VESA(0): EDID Version: 1.3 > (II) VESA(0): Digital Display Input > (II) VESA(0): Max H-Image Size [cm]: horiz.: 37 vert.: 23 > (II) VESA(0): Gamma: 2.20 > (II) VESA(0): No DPMS capabilities specified; RGB/Color Display > (II) VESA(0): First detailed timing is preferred mode > (II) VESA(0): redX: 0.614 redY: 0.353 greenX: 0.321 greenY: 0.561 > (II) VESA(0): blueX: 0.152 blueY: 0.124 whiteX: 0.313 whiteY: 0.329 > (II) VESA(0): Manufacturer's mask: 0 > (II) VESA(0): Supported additional Video Mode: > (II) VESA(0): clock: 162.0 MHz Image Size: 367 x 230 mm > (II) VESA(0): h_active: 1920 h_sync: 1968 h_sync_end 2000 h_blank_end > 2160 h_border: 0 > (II) VESA(0): v_active: 1200 v_sync: 1201 v_sync_end 1204 v_blanking: > 1250 v_border: 0 > > If you scroll down through the log, you can see where all possible > resolutions are gone through and it may even tell you why it decided on > 1024x768. > > There are monitors that give bad data in the EDID (DDC). For instance, > the old version of the DELL 24" display was .1 (yes point 1) off, and > therefore by default no driver would go above 1600x1200. With that > monitor it was necessary to tell the video driver to ignore the EDID > data and simply do what was asked. :) > > Here is how that is done: > > Add values to the Monitor section that are at least capable of the > resolution you need. > > Section "Monitor" > ... > HorizSync 31.5 - 90.0 > VertRefresh 60.0 - 60.0 > ... > > Now, in the screen section, tell it to ignore that part of the the EDID. > > Section "Screen" > ... > Option "ModeValidation" "NoMaxPClkCheck" > ... > > Hope this may help ya. > > Good luck! Thank you very much! I will try this out as soon as I get to work on monday. Few days ago I tried something else; I switched from i810 to intel driver in Xorg.conf and now when I boot up my laptop I get 1024x768 on both my 15" laptop screen and external 19" Samsung LCD. How can I setup so that I have my laptop running at 1024x768 and my Samsung running at 1280x1024 resolution? I would like to make external screen my default desktop when both of them are attached but when I boot with only laptop screen then I would (obviously) like that my laptop screen doesn't freak out and that it know that it is now the main screen. It this possible? -- http://kernelreloaded.blog385.com/ linux, blog, anime, spirituality, windsurf, wireless registered as user #367004 with the Linux Counter, http://counter.li.org. ICQ: 2125241 Skype: valent.turkovic
