Re: problem in screen resolution at 1024*768
>>> Rafael Quintanilla writes:
Rafa> I recently installed debian from a Knoppix 3.3
Rafa> catalan. The problem is that I want to have a 1024*768
Rafa> resolution (BTW my monitor is a 15" SyncMaster 551S,
Rafa> samsung, with a recommeded refresh vertical rate of 85
Rafa> Hz). I obtain only a 800x600 resolution (see attached
Rafa> file XF86Config-4_old.txt).
I just had an issue like this as well. I used the XF86Config-4
file from Knoppix and couldn't get the resolution that I wanted.
In order to get that resolution, my first attempt was to just add
the mode like this:
Modes "800x600" "640x480"
Modes "1280x1024" "800x600" "640x480"
but that didn't work.
The REASON it didn't work is that the XF86Config-4 from Knoppix
had all these ModeLine's:
# These are the DDC-probed settings reported by your monitor.
# 1152x864, 75.0Hz; hfreq=67.50, vfreq=75.00
ModeLine "1152x864" 108.00 1152 1216 1344 1600 864 865 868 900 +hsync +vsync
# 1024x768, 75.0Hz; hfreq=60.02, vfreq=75.03
ModeLine "1024x768" 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync
# 800x600, 75.0Hz; hfreq=46.88, vfreq=75.00
ModeLine "800x600" 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync
and XFree86 didn't like something about them.
In order to fix it, I just removed all of the ModeLine's and let
XFree86 do its work.
I decided to remove them based on the XFree86-Video-Timings-HOWTO
This HOWTO is effectively obsolete. Current (4.0.1 and up) versions of
XFree86 compute optimal modelines from the resolution you specify in the
Modes section of your X configuration file.
So I removed the ModeLine's from my XF86Config-4 file and then I
could get 1280x1024 like I wanted.
Note that I *DID* have to have the "1280x1024" in the Modes line
so that XFree86 knew that I wanted to use the resolution....
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