On Wed, Nov 12, 2003 at 11:33:07PM +1030, Malcolm Kay wrote: > I have a machine controlling a tester. Tester control and display is via a > virtual console terminal. (X is not installed on the machine) > > I need to blank the screen (screen saver style) when there is no terminal > activity for some time -- much the same as as normal screen-saver > operation except that screen output as well as keyboard input should > inhibit the screen-saver taking over or cause the normal terminal display > to be restored if the saver is already in effect. > > I would hope that there might be some ioctl call to the terminal which > could be used from within the tester control software to wake up the > terminal or prevent the screen saver taking over until a further timeout > has elapsed. I've not been able to find such an ioctl call parameter. > > > Does anyone have any ideas or a solution please?
See vidcontrol(1): # vidcontrol -t 30 sets the console screensaver timeout to 30s, and # vidcontrol -t off turns off the console screensaver. This does indeed operate using the CONS_BLANKTIME ioctl -- see the code in the set_screensaver_timeout() function in /usr/src/usr.sbin/vidcontrol/vidcontrol.c and the <sys/consio.h> header file. I think that ioctl should do what you want, although I'm not sure that setting the blanking time to zero would actually cancel a running screen saver. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK
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