Arch Linux

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,354

Puzzling kernel log entries in response to switch from AC to battery

I have noticed a new message in my logs that occurs in response to unplugging the AC adapter from my HP DV4 laptop.

Aug  7 10:02:05 localhost kernel: [308975.424320] EXT4-fs (sda8): re-mounted. Opts: commit=0
Aug  7 10:02:05 localhost kernel: [308975.438978] EXT4-fs (sda7): re-mounted. Opts: user_xattr,commit=0

Remounting of drives in response to a change over to battery?
I've done my research, but came up blank.

Any of you Archers seen this?

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ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,354

Re: Puzzling kernel log entries in response to switch from AC to battery

Oh yeah:

ewaller@odin:/etc/acpi 1010 %uname -a
Linux odin 2.6.39.3-HP_DV4 #3 SMP PREEMPT Sat Jul 16 11:50:00 PDT 2011 x86_64 Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz GenuineIntel GNU/Linux
ewaller@odin:/etc/acpi 1011 %

It is a custom kernel, but nothing really special except building in modules so I don't need an initrd.

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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How to Ask Questions the Smart Way

Hohoho

Member

Registered: 2007-06-23

Posts: 222

Re: Puzzling kernel log entries in response to switch from AC to battery

This is probably laptop-mode-tools adjusting the FS options for longer battery life.

Try disabling laptop-mode-tools and checking whether this still happens.

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,354

Re: Puzzling kernel log entries in response to switch from AC to battery

Could be.  I'll check it out.

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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How to Ask Questions the Smart Way

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,354

Re: Puzzling kernel log entries in response to switch from AC to battery

This is probably laptop-mode-tools adjusting the FS options for longer battery life.

Try disabling laptop-mode-tools and checking whether this still happens.

You were on the right path.  It isn't laptop-mode-tools though.

I primarily run with Openbox.  Because I try to provide support on these Forums (and because I like to tinker) I keep Lxde, Xfce4 and Gnome around as well. 

The phenomenon occurs after logging into Gnome.  I don't use a login manager, so I expect an environment to go away after I log out from it.  Apparently, Gnome leaves some Flobydust around that persists after I log out of Gnome and into OpenBox.

Grrrrr. 

Anyway, you are right.  It really is not a kernel message.

Thanks

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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How to Ask Questions the Smart Way

Inxsible

Forum Fellow

From: Chicago

Registered: 2008-06-09

Posts: 9,183

Re: Puzzling kernel log entries in response to switch from AC to battery

Remove Gnome

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