Display backlight still on when screen saver runs

[Lars Noodén]

The screen saver successfully blanks the screen but leaves the backlight on. The backlight should turn off when the screensaver kicks in.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xscreensaver 5.15-2ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-15.22-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
Date: Fri Sep 21 20:12:35 2012
InstallationMedia: Lubuntu 12.10 "Quantal Quetzal" - Alpha amd64+mac (20120920)
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xscreensaver
UpgradeStatus: No upgrade log present (probably fresh install)

[Tormod Volden (tormodvolden)]

It should turn off the backlight eventually, but some time after the screen has been blanked. Does this happen?

If this does not happen, please run this to see if the graphic driver is capable enough:
 xset dpms force off; sleep 7; xset dpms force on
This should turn off the screen (power saving) for 7 seconds, then turn it on again.
Please also attach /var/log/Xorg.0.log.

Turning off the backlight immediately may not fit all users and hardware.

[Lars Noodén (larsnooden)]

No. Even if I leave it for a very long time after the screen is blanked, the backlight still stays on.

[Lars Noodén (larsnooden)]

xset works to turn off the screen's backlight. It'd be fine if the backlight turns off sometime after the screensaver starts, just as long as it turns off sometime. It would save on the battery.

[Michał Fita (michal.fita)]

11 years later and I have the same problem on 22.04. Seriously?