DPMS events reset event timer causing gnome-power-manager to exit idle state almost immediately after a blank event

Bug #426765 reported by Subu Krishnamoorthy on 2009-09-09
This bug affects 3 people
Affects Status Importance Assigned to Milestone
xorg-server (Ubuntu)

Bug Description

Binary package hint: xserver-xorg-core

Ubuntu Karmic Alpha 5
xserver-xorg-core 1.6.3-1ubuntu6
Expected behavior: Backlight should turn off after the specified interval.
Current Behavior: Backlight goes off but immediately comes back on because of the event timer reset. gnome-power-manager receives an reset event and is falsely led to believe that there is user activity.

Important since this drains laptop batteries at a faster rate.

This is probably fixed in commit c1d901d723c3bee523736eacc15b44a7dff484fe, so I guess it needs to be cherrypicked. I think it should have made it into xserver-xorg-core-1.6.3-1ubuntu3 (with other related upstream cherrypicks), but was missed.

Bryce Harrington (bryce) wrote :

Hi madank,

Please attach the output of `lspci -vvnn` and `dmesg`, and attach your /var/log/Xorg.0.log (and maybe Xorg.0.log.old) file from after reproducing this issue. If you're using a custom /etc/X11/xorg.conf please attach that as well.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: needs-xorglog
tags: added: needs-lspci-vvnn
Changed in xorg-server (Ubuntu):
status: New → Incomplete
Subu Krishnamoorthy (madank) wrote :

Added output of `lspci -vvnn`

Subu Krishnamoorthy (madank) wrote :

Added output of `dmesg`

Subu Krishnamoorthy (madank) wrote :
Subu Krishnamoorthy (madank) wrote :
Subu Krishnamoorthy (madank) wrote :
Subu Krishnamoorthy (madank) wrote :

Are there any plans for someone to look into this before the karmic release?

Alex Murray (alexmurray) wrote :

I think this affects me too on latest Karmic since my screen backlight never goes off even though I have set gnome-power-manager to put it to sleep after 5 minutes - running latest Karmic updates on NVIDIA 9600M GT with proprietary nvidia-glx-185 drivers installed from official ubuntu repo. Any chance the xorg patch can be applied since at the moment this is a serious regression from Jaunty as now my laptop backlight is never switched off.

Alex Murray (alexmurray) wrote :

Is this a dup of #413168

Nahuel (nawels) wrote :

I'm having this exact problem too. Screen goes off, but immediately it goes on again, in blank mode (which is my screensaver). I'm running Ubuntu Karmic with the latest updates. I have an Intel graphic chipset, X3100 (GMA965).

Jaime Rave (jaimerave) wrote :

This problem is affecting me too. In fact in the systray area appear an icon that tell to report the problem and to look at this link for more info:


Scott Moser (smoser) wrote :

Moving this from incomplete to confirmed. I can verify it, and the bug opener attached the requested lspci output.

Changed in xorg-server (Ubuntu):
status: Incomplete → Confirmed
Subu Krishnamoorthy (madank) wrote :

This is fixed in 1.6.3-1ubuntu7 as noted in bug 413168. Many thanks to loic.minier.
Marked as duplicate of 413168.

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