Display wakes up bright on power loss, and doesn't go off

[Jeenu V]

This problem is observed on my laptop, Dell Inspiron 6400 running Ubuntu (Jaunty at present, but was there for previous releases too).

Steps to reproduce this: Lock the laptop by pressing Ctrl+Alt+L. Display goes to sleep after some time, leaving it blank and black. Now witch the power off, or plug the power cord out. LCD display suddenly wakes up showing the password entry dialog, as if I pressed a key or clicked the mouse. Display, then wouldn't shutdown (i.e. goes off), until I press ESC and thus quitting the password entry dialog.

The problem, here, is that display stays bright even after power loss, there by draining the battery quite fast.

[Scott Howard (showard314)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue that you reported is one that should be reproducible with the live environment of the Desktop CD of the development release - Karmic Koala. It would help us greatly if you could test with it so we can work on getting it fixed in the next release of Ubuntu. You can find out more about the development release at http://www.ubuntu.com/testing/. Thanks again and we appreciate your help.

[Jeenu V (jeenuv)]

Thanks for the response.

Since I'm new the procedure you just mentioned, I'd appreciate if you could help me a bit here: for the testing purpose, I'm supposed to download the Alpha 2 release Desktop image (available here: http://cdimage.ubuntu.com/releases/karmic/alpha-2/karmic-desktop-i386.iso) , burn it to CD, live boot, and then try to reproduce the bug I raised; is that correct?

[Scott Howard (showard314)]

Yes, that is correct! Thanks for your help!

On Mon, Jul 13, 2009 at 9:48 PM, Jeenu V<email address hidden> wrote:
> Thanks for the response.
>
> Since I'm new the procedure you just mentioned, I'd appreciate if you
> could help me a bit here: for the testing purpose, I'm supposed to
> download the Alpha 2 release Desktop image (available here:
> http://cdimage.ubuntu.com/releases/karmic/alpha-2/karmic-
> desktop-i386.iso) , burn it to CD, live boot, and then try to reproduce
> the bug I raised; is that correct?
>
> --
> Display wakes up bright on power loss, and doesn't go off
> https://bugs.launchpad.net/bugs/377166
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “gnome-power-manager” package in Ubuntu: Incomplete
>
> Bug description:
> This problem is observed on my laptop, Dell Inspiron 6400 running Ubuntu (Jaunty at present, but was there for previous releases too).
>
> Steps to reproduce this: Lock the laptop by pressing Ctrl+Alt+L. Display goes to sleep after some time, leaving it blank and black. Now witch the power off, or plug the power cord out. LCD display suddenly wakes up showing the password entry dialog, as if I pressed a key or clicked the mouse. Display, then wouldn't shutdown (i.e. goes off), until I press ESC and thus quitting the password entry dialog.
>
> The problem, here, is that display stays bright even after power loss, there by draining the battery quite fast.
>

[Jeenu V (jeenuv)]

I tried to reproduce this bug with Alpha release 2 of Karmic Koala (live CD). However, this behave differently then. The display never shuts down if I were to boot it from CD. If I press Ctrl+Alt+L, display simply goes blank (with background lit), and never shuts off. As stupid as it might sound, I changed the passwd to check if pretending to be a "real" user makes a difference; but it didn't! So I guess I won't be able to reproduce it with live CD.

As an aside, I noticed this behavior with Jaunty installation: I mostly use my laptop under my login (jeenu). However, I have another login for friends (guest). If it so happens that I do a "switch user" from jeenu to guest, then:

* The LCD brightness is reset to maximum, no matter what preference is set in guest login. Also, it never comes back to default level, even if I switch back to jeenu - I've to crank it down manually (well, it does sometimes, but rarely)
* Even if display were to sleep (either by timeout or by manually locking screen), it never shuts off! It just goes blank, with background lit.

I think all these are related. I'm glad to provide you with any logs that you might require - please let me know.

[Scott Howard (showard314)]

Thanks for checking, Jeenu. Over the next few weeks we will be doing
several changes to gnome-power-manager and devicekit-power. We'll have
to work on improving this in Karmic since it may be impossible to
backport the significant changes in GPM into Jaunty.

On Thu, Jul 30, 2009 at 10:34 PM, Jeenu V<email address hidden> wrote:
> I tried to reproduce this bug with Alpha release 2 of Karmic Koala (live
> CD). However, this behave differently then. The display never shuts down
> if I were to boot it from CD. If I press Ctrl+Alt+L, display simply goes
> blank (with background lit), and never shuts off. As stupid as it might
> sound, I changed the passwd to check if pretending to be a "real" user
> makes a difference; but it didn't! So I guess I won't be able to
> reproduce it with live CD.
>
> As an aside, I noticed this behavior with Jaunty installation: I mostly
> use my laptop under my login (jeenu). However, I have another login for
> friends (guest). If it so happens that I do a "switch user" from jeenu
> to guest, then:
>
> * The LCD brightness is reset to maximum, no matter what preference is set in guest login. Also, it never comes back to default level, even if I switch back to jeenu - I've to crank it down manually (well, it does sometimes, but rarely)
> * Even if display were to sleep (either by timeout or by manually locking screen), it never shuts off! It just goes blank, with background lit.
>
> I think all these are related. I'm glad to provide you with any logs
> that you might require - please let me know.
>
> --
> Display wakes up bright on power loss, and doesn't go off
> https://bugs.launchpad.net/bugs/377166
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “gnome-power-manager” package in Ubuntu: Incomplete
>
> Bug description:
> This problem is observed on my laptop, Dell Inspiron 6400 running Ubuntu (Jaunty at present, but was there for previous releases too).
>
> Steps to reproduce this: Lock the laptop by pressing Ctrl+Alt+L. Display goes to sleep after some time, leaving it blank and black. Now witch the power off, or plug the power cord out. LCD display suddenly wakes up showing the password entry dialog, as if I pressed a key or clicked the mouse. Display, then wouldn't shutdown (i.e. goes off), until I press ESC and thus quitting the password entry dialog.
>
> The problem, here, is that display stays bright even after power loss, there by draining the battery quite fast.
>

[Jeenu V (jeenuv)]

Great - so I guess this would mostly likely be fixed in Karmic stable release.

[Jeenu V (jeenuv)]

I just upgraded to Karmic and this problem doesn't seem to occur in Karmic. I shall raise again if and when Karmic misbehaves :)

[Victor Vargas (kamus)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We were wondering if this is still an issue for you. Can you try with the latest Ubuntu release? Thanks in advance.

[Jeenu V (jeenuv)]

When you say latest Ubuntu release, did you mean Lucid? If so I think I'll wait until it's released. But for Karmic, I don't see this happening; but I don't have another annoyance with the power manager reported here: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/491975

[Jeenu V (jeenuv)]

I meant to say "I do have another annoyance". Sorry for the typo.

[Launchpad Janitor (janitor)]

[Expired for gnome-power-manager (Ubuntu) because there has been no activity for 60 days.]