HorizSync/VertRefresh ranges of LCD/Graphics card?
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From: Glyn Millington on 6 Jan 2010 04:20 Tuxedo <tuxedo(a)mailinator.com> writes: > Grant wrote: > > [...] > >> Usually the driver gets the info direct from the LCD, check what the >> xorg logfile has to say about screen detection. >> >> Grant. > > I checked my Xorg.O.log, and yes, it has much detail about the chipset and > so on, however, most of it is not easy to understand and certainly no > legible information about horizontal sync and vertical refresh range of the > LCD exists in my logs. In case the driver knows the correct values, or just > best-guesses them, it's probably not logged. Don't now where this chap got HIS info from, but he seems happy with these settings http://wiki.archlinux.org/index.php/Averatec_3320-EH1 atb Glyn -- RTFM http://www.tldp.org/index.html GAFC http://slackbook.org/ The Official Source :-) STFW http://groups.google.com/groups?hl=en&group=alt.os.linux.slackware JFGI http://jfgi.us/
From: allend on 6 Jan 2010 09:14 You could add this line to the Monitor section of your xorg.conf to ensure that the native settings are used.. ModeLine "1024x768" 65.000 1024 1048 1184 1344 768 771 777 806 +hsync +vsync
From: Tuxedo on 6 Jan 2010 13:07 Eef Hartman wrote: [...] > OSD = On Screen display, the setup you get by (mostly) pressing a "menu" > button on your screen. It often has an "information" section in which > resolution and currently used frequencies are shown. Ahh! Found it on my desktop LCD. Useful to know! The same button does not exist on the laptop I'm trying to configure however. [...] > It found you specified the amount of VideoRam _wrong_ (128 MB instead of > kB) I changed the value in the Device section to the following: VideoRam 131072 Thanks for pointing this error out! Tuxedo
From: Tuxedo on 6 Jan 2010 13:19 Eef Hartman wrote: > Tuxedo <tuxedo(a)mailinator.com> wrote: > > Standard timings supported > > 640 x 480p at 60Hz - IBM VGA > > 800 x 600p at 60Hz - VESA > > 1024 x 768p at 60Hz - VESA > > ^^^^ > > Nothing explicity about horizontal sync and vertical refresh however. > > It _does_ say at 60 Hz, that _is_ the Vertical Refresh rate > (number of screen updates per second). > And normally X.org will autodetect that with modern flatscreens, > no need to specify any frequencies at all. Good to know there's no need for those secret values after all! Your advise could be mentioned in xorg.conf or its manual; I mean what applies to CRT monitors vs. LCD screens. Who in the world has an old CRT monitor nowadays anyway?! I removed the VertRefresh values from xorg.conf altogether. Tuxedo
From: Tuxedo on 6 Jan 2010 13:39
allend wrote: > You could add this line to the Monitor section of your xorg.conf to > ensure that the native settings are used.. > ModeLine "1024x768" 65.000 1024 1048 1184 1344 768 771 777 806 +hsync > +vsync Thanks for this one-liner, I added it to the Monitor section. I'm not sure if it makes a difference one way or the other. In general, my X sessions now work fine. It's only the flickering of the console after logging out of any first X session of booting the laptop that still persists for some reason, but it's hopefully nothing too important to worry about. In the meantime, I found this tool: http://xtiming.sourceforge.net/cgi-bin/xtiming.pl I'm not 100% sure what to enter in which fields for a correct output however. Anyway, maybe it's no good as it's an old XFree86 utility, or maybe it's mainly useful for old CRT screens. Tuxedo |