RESIZECONS(8)             (17 Jan 1995)             RESIZECONS(8)

     NAME
          resizecons - change kernel idea of the console size

     SYNOPSIS
          resizecons COLSxROWS
          resizecons -lines ROWS

     DESCRIPTION
          The resizecons command tries to change the videomode of the
          console.  There are several aspects to this: (a) the kernel
          must know about it, (b) the hardware must know about it, (c)
          user programs must know about it, (d) the console font may
          have to be adapted.

          (a) The kernel is told about the change using the ioctl
          VT_RESIZE.  This causes the kernel to reallocate console
          screen memory for all virtual consoles, and might fail if
          there is not enough memory.  (In that case, try to disallo-
          cate some virtual consoles first.)  If this ioctl succeeds,
          but a later step fails (e.g., because you do not have root
          permissions), you may be left with a very messy screen.

          The most difficult part of this is (b), since it requires
          detailed knowledge of the video card hardware, and the set-
          ting of numerous registers. Only changing the number of rows
          is slightly easier, and resizecons will try to do that
          itself, when given the -lines option. (Probably, root per-
          mission will be required.)  The command resizecons COLSxROWS
          will execute restoretextmode -r COLSxROWS (and hence
          requires that you have svgalib installed). Here COLSxROWS is
          a file that was created earlier by restoretextmode -w
          COLSxROWS. Again, either root permissions are required, or
          restoretextmode has to be suid root.

          In order to deal with (c), resizecons does a `stty rows ROWS
          cols COLS' for each active console (in the range
          tty0..tty15), and sends a SIGWINCH signal to selection if it
          finds the file /tmp/selection.pid.

          Finally, (d) is dealt with by executing a setfont command.
          Most likely, the wrong font is loaded, and you may want to
          do another setfont yourself afterwards.

     BUGS
          resizecons does not work on all hardware.  For example, it
          cannot be used on platforms other than x86 and x86_64.  See
          the fbset(1) program if you are looking for an alternative.

          This command used to be called resize, but was renamed to

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     RESIZECONS(8)             (17 Jan 1995)             RESIZECONS(8)

          avoid conflict with another command with the same name.

     SEE ALSO
          setfont(8), stty(1), selection(1), restoretextmode(8),
          disalloc(8), fbset(1)

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