screenblank(1) - NetBSD Manual Pages

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SCREENBLANK(1)          NetBSD General Commands Manual          SCREENBLANK(1)

screenblank -- screen saver daemon for wscons and FBIO machines
screenblank [-k | -m] [-d inactivity-timeout] [-e wakeup-delay] [-f framebuffer] [-i input-device] screenblank {-b | -u}
screenblank disables the framebuffer if the keyboard and mouse are idle for a period of time, and re-enables the framebuffer when keyboard or mouse activity resumes. When killed with a SIGINT, SIGHUP, or SIGTERM, screenblank will re-enable the framebuffer. The pid can be found in the file /var/run/ The options are as follows: -b Overriding the other options, simply try (once) to blank the framebuffer, then exit. -d inactivity-timeout Wait the number of seconds specified by inactivity-timeout, expressed in the format ``'', before disabling the frame- buffer due to inactivity. The default is 600 seconds (10 min- utes). -e wakeup-delay Wait the number of seconds specified by wakeup-delay, expressed in the format ``'', before re-enabling the framebuffer once activity resumes. The default is .25 seconds. -f framebuffer Use the framebuffer device framebuffer instead of the default /dev/fb. -i input-device Add input-device to the list of devices to monitor for activity. -k Do not check the keyboard for activity. -m Do not check the mouse for activity. -u Overriding the other options, simply try (once) to unblank the framebuffer, then exit. Note that the -k and -m flags are mutually exclusive.
/dev/kbd The keyboard device. /dev/mouse The mouse device. /dev/console The console device. /dev/fb The default framebuffer. /dev/wskbd The keyboard for wscons machines. /dev/wsmouse The mouse device for wscons machines. /dev/ttyE0 The console device for wscons machines. /var/run/ File containing the pid of screenblank.
screenblank checks the access and modification times of the devices it is monitoring to determine activity. If the devices are on a file system mounted with the noatime and/or nodevmtime options, it will not function as expected. A possible workaround is to use a script as such: #!/bin/sh /usr/sbin/screenblank -d 0 -e 0 && read /usr/bin/pkill screenblank NetBSD 10.99 April 8, 2019 NetBSD 10.99
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