94 lines
4.0 KiB
Plaintext
94 lines
4.0 KiB
Plaintext
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How to add Low-res modes to your XF86Config under Linux MANUALLY
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I TAKE NO RESPONSIBILITY FOR ANY DAMAGE DONE TO YOUR EQUIPMENT!!!
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This document explains how to add low-res modes like 320x200 to your
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X-Server configuration, because some new setup tools for the X-Server
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do not support this. ONLY RECOMMENDED FOR USERS WHO KNOW WHAT THEY DO!
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I do not take any responsibility for damage done to your monitor, your
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videocard, your harddisk, your cat, your dog or anything else!!!
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IMPORTANT IS, THAT YOUR "HorizSync" AND "VertRefresh" VALUES REALLY
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MATCH YOUR MONITOR! OTHERWISE YOUR MONITOR CAN BLOW UP!!!
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OK, if you have read up to here, you either know what you do or really
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die-hard want those low-res modes. Here is what to do:
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Look up your XF86Config. Is is either in /etc or in /etc/X11. Here is
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what you have to add to the definition of your modeslines:
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# Low-res Doublescan modes
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# If your chipset does not support doublescan, you get a 'squashed'
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# resolution like 320x400.
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# 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio
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Modeline "320x200" 12.588 320 336 384 400 200 204 205 225 Doublescan
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# 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio
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Modeline "320x240" 12.588 320 336 384 400 240 245 246 262 Doublescan
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# 320x240 @ 72 Hz, 36.5 kHz hsync
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Modeline "320x240" 15.750 320 336 384 400 240 244 246 262 Doublescan
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# 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio
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ModeLine "400x300" 18 400 416 448 512 300 301 302 312 Doublescan
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# 400x300 @ 60 Hz, 37.8 kHz hsync
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Modeline "400x300" 20 400 416 480 528 300 301 303 314 Doublescan
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# 400x300 @ 72 Hz, 48.0 kHz hsync
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Modeline "400x300" 25 400 424 488 520 300 319 322 333 Doublescan
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If your video card only supports a specific set of discrete dotclocks
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(RAMDAC) you may have to replace the dotclocks given here by one of the
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specified (e.g in the first modeline the dotclock is 12.588 MHz). I believe
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that nowadays all cards and monitors should work with these settings, but
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if you have outdated hardware you better check the frequencies yourself. If
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there is any uncertainty, please check the "XFree86 Video Timings HOWTO".
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Then have a look at the section "Screen" with the appropriate driver
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(usually either "svga" or "accel"). Under Subsection "Display" there
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are modes for the given color depth. Add the desired modes. As an
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example I give you my screens definition here with low-res modes in
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16 bit color depth:
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Section "Screen"
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Driver "accel"
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Device "3D Charger"
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Monitor "Iiyama Pro 450"
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DefaultColorDepth 16
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Subsection "Display"
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Depth 8
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Modes "1280x1024" "1024x768" "800x600" "640x480"
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ViewPort 0 0
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Virtual 1280 1024
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EndSubsection
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Subsection "Display"
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Depth 16
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Modes "1152x864" "1024x768" "800x600" "640x480" "400x300" "320x200" <- THIS IS ACTUALLY WHAT YOU WANT!!!
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ViewPort 0 0 ^^^^^^^^^^^^^^^^^^^
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Virtual 1152 864
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EndSubsection
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Subsection "Display"
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Depth 24
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Modes "800x600" "640x480"
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ViewPort 0 0
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Virtual 800 600
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EndSubsection
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Subsection "Display"
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Depth 32
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Modes "800x600" "640x480"
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ViewPort 0 0
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Virtual 800 600
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EndSubsection
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EndSection
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Once again: important is, that you edit the correct Screen section.
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If you use the SVGA Server and edit the ACCEL Server, you might
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wonder where your new modes have gone.
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If everything went fine and you want to say thank you, just write
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to "metzgermeister@users.sourceforge.net". If your monitor blew
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up and you want to kill me, find me playing Legacy or Q3A on the net
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and frag me (with your second monitor, hehe).
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- metzgermeister
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