linux man page for resizecons

RESIZECONS(8)							  Console Support						     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 vir-
       tual  consoles,	and  might  fail  if there is not enough memory.  (In that case, try to disallocate 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 setting of numerous regis-
       ters. Only changing the number of rows is slightly easier, and resizecons will try to do that itself, when given the -lines option. (Proba-
       bly, root permission 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.  This command used to be called resize, but was renamed to avoid conflict  with  another  command
       with the same name.

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

Local								    17 Jan 1995 						     RESIZECONS(8)