Random switching between battery/AC mode

Bug #160726 reported by RurouniJones on 2007-11-07
Affects Status Importance Assigned to Milestone
kde-guidance (Ubuntu)
Andreas Wenning

Bug Description

Kubuntu 7.10 Gutsy
Kubuntu device database submission ID: http://hwdb.ubuntu.com/?xml=5630a3b12ef95e9c0df7d4913ed95d0e (When it finally loads)

When the laptop is running on battery power or the AC (With the battery attached) the laptop randomly switches between AC and Battery mode (i.e. screen dimming and CPU frequency reduced).
There is no pattern to the changes between the two modes and it can happen several times in a few minutes.

When the laptop is switching between the modes the life-timer on the battery goes totally inaccurate (For example: Reporting 0% charged but charging even though the battery is fully charged)

The only way to run correctly is on AC with no battery attached. I am using the default power manager that comes with Kubuntu.
This issue has been reported by other users on MSI laptops with Intel chipsets: See http://ubuntuforums.org/showthread.php?t=582673

Laptop mode is not enabled.



description: updated
RurouniJones (rurounijones) wrote :

Added the hardware profile generated by the database program since the site appears to be b0rked.

Brian Murray (brian-murray) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in kde-guidance-powermanager.

pr0be (ruben-nocturno) wrote :

I have the same problem in a MSI PR200 YA (laptop) running Ubuntu 7.10 (Gnome based).
Please tell me if you need more information.

Theodoric (imbillybob) wrote :

I have the same problem with laptop switching between battery and AC when plugged in. I am running Windows XP, SP2 on an HP ze 2000 series laptop.
I have never been involved with Ubuntu, I just found this forum after a google search. The problem just appeared after my latest format and only happens for just a few minutes when I first plug my laptop in after being unplugged. Very annoying.
Please let me know if you find out anything. I'll do the same. Thanks

RurouniJones (rurounijones) wrote :


This is a bug-tracking system for issues in the Ubuntu Linux distribution only so you won't get much help because your problem is either in the hardware or Microsoft Windows XP, neither of which this supports. If you want more help you should find a windows forum or contact HP and Microsoft.


pickett.aaron (pickett-aaron) wrote :

Anything new on this issue? Could not find it where it says it is posted here

RurouniJones (rurounijones) wrote :

It has been categorised but nothing has happened in terms of assignment or priority, it is still listed as new and the importance in undecided by those in power.
Needless to say that for me this is critical since I can't use the laptop on the go...

pickett.aaron (pickett-aaron) wrote :

Hrmm.. this is a real annoying problem.... I did some research, and on one form there was something about adding noacpi at the end of the script in the grub loader. It seemed like this fixed my problem. But no, it started acting up again. What is the link to the isssue on this wen site? Also, any new news?

camellight (ceminino) wrote :

this is uber annoying, and it seems it won't be solved before a long time. Suspend doesn't work for me either, the laptop shutdowns instead of reawakening.

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 - Hardy Heron. 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 [WWW] http://www.ubuntu.com/testing/ . Thanks again and we appreciate your help.

If it still happens:
1. Do you get a popup on the screen about switching between AC/battery?
2. Does the problem also occur if kde-guidance-powermanager is exited (right click the battery in the panel and choose exit)?

Changed in kde-guidance:
assignee: nobody → andreas-wenning
status: New → Incomplete
pickett.aaron (pickett-aaron) wrote :

Installed 8.04... SO far the problem has not come back. However running into Nvidia graphics problems so I can't say for sure this will not pop up since I am not running the exact same settings........ So far so good tho....... Need to start a thread on this Nvidia Low graphics mode stuff now......

winter (vaudeville-pop) wrote :

I'm not involved enough in the community that much but am having this problem as well. Just installed Ubuntu 8.04 (hardy) on fujitsu p7010 with intel pentium M 1100Mhz. Thank you.

Does anyone still have this problem? Please test if it still exists in hardy.

If it does:
1. Do you get a popup on the screen about switching between AC/battery?
 2. Does the problem also occur if kde-guidance-powermanager is exited (right click the battery in the panel and choose exit)?

Jonathan Thomas (echidnaman) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in kde-guidance:
status: Incomplete → Invalid
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