Stopping Raspberry Pi display sleep

Question

I'm using my raspberry pi displayed on a tv through HDMI. It boots up into the terminal and is fine, however, when I leave it for a few minutes, the display goes to sleep.

I'm using an application called conspy to control the console from another computer, but the display does not wake once I start typing (I can still ssh and everything else).

Is there a command that will wake the display or just prevent it from sleeping? I'm not using the GUI, just the console it boots into.

Edit: I sometimes use the standard video output as well, so a fix for either hdmi or video will be appreciated.

Make sure it's the Pi actually turning the TV blank, and not the TV's built-in sleep timer. :) — tlhIngan, May 29 '16 at 18:18

score 12 · Accepted Answer · answered Nov 25 '12 at 01:40

12

You could try

you@yourpi:~$ setterm -powersave off -blank

This should prevent the screen from sleeping for the current session. Put it in your .bashrc to make it permenant.

answered Nov 25 '12 at 01:40

xereeto

136
1
2

2

Returns "cannot (un)set powersave mode", even when I try sudo – Will Cobb Nov 25 '12 at 01:46
Is X running? If so, end it and retry. – xereeto Nov 25 '12 at 01:52
Or put this in your rc.local (then reboot): sh -c 'setterm -blank 0 -powersave off -powerdown 0 < /dev/console > /dev/console 2>&1' – xereeto Nov 25 '12 at 01:57
4

Even better, add consoleblank=0 to the kernel command-line. – xereeto Nov 25 '12 at 02:00
1

I rebooted and it accepted it (setterm -powersave off -blank). My screen saver hasn't activated since. Thank you. – Will Cobb Nov 25 '12 at 02:26
4

I get an error: setterm: terminal xterm-256color does not support --blank setterm: cannot (un)set powersave mode: Inappropriate ioctl for device :( – mgPePe Jan 24 '16 at 20:29
I think you forgot a 0 after blank. (setterm -powersave off -blank 0) Is that right ? – ssinfod Oct 31 '16 at 18:17

score 0 · Answer 2 · answered Nov 23 '17 at 20:44

0

As per this thread, you can edit /boot/cmdline.txt, appending consoleblank=0.

This changes the kernel parameter. (This is also mentioned in the comments to the other answer, but these are explicit instructions on how to set it.)

answered Nov 23 '17 at 20:44

Sparhawk

693
4
18
33

Stopping Raspberry Pi display sleep

2 Answers2

Linked

Related