AnonSec Shell

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9"> <TITLE>The Linux keyboard and console HOWTO: Changing the video mode</TITLE> <LINK HREF="kbd.FAQ-17.html" REL=next> <LINK HREF="kbd.FAQ-15.html" REL=previous> <LINK HREF="kbd.FAQ.html#toc16" REL=contents> </HEAD> <BODY> <A HREF="kbd.FAQ-17.html">Next</A> <A HREF="kbd.FAQ-15.html">Previous</A> <A HREF="kbd.FAQ.html#toc16">Contents</A> <HR> <H2><A NAME="s16">16. Changing the video mode</A></H2> <P>    <P>As far as I know there are 6 ways to change resolution: <P>1. At compile time: change the line <BLOCKQUOTE><CODE> <PRE> SVGA_MODE= -DSVGA_MODE=NORMAL_VGA </PRE> </CODE></BLOCKQUOTE> in <CODE>/usr/src/linux/Makefile</CODE>. <P>1A. After compilation: use <CODE>rdev -v</CODE> - a terrible hack, but it exists. <P>2. At boot time: put <CODE>vga=ask</CODE> in the lilo config file, and lilo will ask you what video mode you want. Once you know, put <CODE>vga=</CODE>mypreference. <P>3. At run time: A. Use the <CODE>resizecons</CODE> command. (This is a very primitive wrapper around the VT_RESIZE ioctl.) B. Use the <CODE>SVGATextMode</CODE> command. (This is a less primitive wrapper around the VT_RESIZE ioctl.) <P>4. Not "on the console": Under <CODE>dosemu</CODE>, or with svgalib etc. you can change the hardware video mode without the console driver being aware of it. Sometimes this is useful in getting <CODE>resizecons</CODE> or <CODE>SVGATextMode</CODE> set up: use <CODE>dosemu</CODE> and some DOS program to get into the desired videomode, dump (say from another VT) the contents of all video hardware registers, and use that in the initialization that <CODE>resizecons</CODE> and <CODE>SVGATextMode</CODE> require. In some cases where the video mode has gotten into some unusable state, starting <CODE>dosemu</CODE>, relying on the BIOS to set up the video mode, and then killing <CODE>dosemu</CODE> (with <CODE>kill -9</CODE>), is the easiest way to get into shape again. <P> <H2><A NAME="ss16.1">16.1 Instructions for the use of resizecons</A> </H2> <P>  <P>Get svgalib and compile the program <CODE>restoretextmode</CODE>. Boot up your machine in all possible video modes (using <CODE>vga=ask</CODE> in the lilo config file), and write the video hardware register contents to files CxR (C=cols, R=rows), e.g., 80x25, 132x44, etc. Put these files in <CODE>/usr/lib/kbd/videomodes</CODE>. Now <CODE>resizecons 132x44</CODE> will change videomode for you (and send SIGWINCH to all processes that need to know about this, and load another font if necessary). <P>At present, <CODE>resizecons</CODE> only succeeds when there is memory enough for both the old and the new consoles at the same time. <P> <HR> <A HREF="kbd.FAQ-17.html">Next</A> <A HREF="kbd.FAQ-15.html">Previous</A> <A HREF="kbd.FAQ.html#toc16">Contents</A> </BODY> </HTML>

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