#631791 pm-utils: overrides option `power_save` in `/etc/modprobe.d/` when not on battery

Package:
pm-utils
Source:
pm-utils
Submitter:
Paul Menzel
Date:
2023-12-21 18:01:11 UTC
Severity:
normal
#631791#5
Date:
2011-06-27 08:22:14 UTC
From:
To:
Dear Debian folks,


although having

	$ more /etc/modprobe.d/eee.conf
	[…]
	options snd_hda_intel power_save=5

after a boot this option does not seem to have been respected.

	$ more /sys/module/snd_hda_intel/parameters/power_save
	0

This option should be supported.

	$ sudo modinfo snd-hda-intel
	[…]
	parm:           power_save:Automatic power-saving timeout (in second, 0 = disable). (int)
	parm:           power_save_controller:Reset controller in power save mode. (bool)

Unfortunately I do not know how to debug this further not knowing how to
find out if this option is passed or not. If this is a bug in
`snd_hda_intel` I am sorry to have chosen the wrong package to report
this bug against and it would be great if you could reassign this.


Thanks,

Paul
#631791#10
Date:
2011-06-27 09:15:11 UTC
From:
To:
Did you rebuild the initramfs?
#631791#15
Date:
2011-06-27 09:23:27 UTC
From:
To:
Am Montag, den 27.06.2011, 11:15 +0200 schrieb Marco d'Itri:

This options has been there since over a year (I just now looked into
power management things) and in between there have been several Linux
kernel upgrades, so I guess the initramfs was rebuild.

I will rebuild it manually though to make sure.


Thank you for your help,

Paul
#631791#20
Date:
2011-06-27 09:39:38 UTC
From:
To:
Am Montag, den 27.06.2011, 11:23 +0200 schrieb Paul Menzel:

I ran `update-initramfs -u` and after a shutdown and new start the
problem is still reproducible.


Thanks,

Paul
#631791#25
Date:
2011-06-27 09:47:40 UTC
From:
To:
Actually it does not work for me either.
Since the option is configured if I rmmod and modprobe again the module,
I suspect that something else is changing it.
More debugging is needed but I cannot reboot my system, I suggest you
start by checking the value after booting in single user mode (and if it
is still wrong, after booting with init=/bin/bash).
#631791#30
Date:
2011-06-27 10:19:59 UTC
From:
To:
retitle 631791 pm-utils: overrides option `power_save` in `/etc/modprobe.d/` when not on battery
reassign 631791 pm-utils
quit

Am Montag, den 27.06.2011, 11:47 +0200 schrieb Marco d'Itri:

Great suggestion! Choosing the rescue mode in GRUB something like the
following was printed to the screen after the boot messages

        sulogin: root account is locked; starting shell

and a prompt is shown.

        # more /sys/module/snd_hda_intel/parameters/power_save
        1

So something is messing with this afterward and is setting the value to
0 as you wrote.

Searching for that I found a comment in Launchpad [1] suggesting that
`pm-utils` is responsible for that behavior.

Testing this, actually this test is not correct, I booted on battery and
at least the value is set.

        $ more /sys/module/snd_hda_intel/parameters/power_save
        1

I am not sure if pm-utils is also responsible for setting it to 0 when
not on battery. The script should check somehow (during start up) if
that module was loaded with certain settings.

Report #625606 [3] seems to be related to this issue only that it deals
with block devices. I am adding Mario to CC. Maybe he has brought that
issue up upstream already.


Thanks,

Paul


[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/381201 (comment 65)
[2] /usr/lib/pm-utils/power.d/intel-audio-powersave
[3] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=625606
#631791#41
Date:
2011-06-27 11:17:49 UTC
From:
To:
pm-utils: /usr/lib/pm-utils/power.d/intel-audio-powersave

Yes, the script forces audio_powersave=1 on battery and
audio_powersave=0 on AC.

Well - in the sense of "unexpected modifications of system behaviour"
your issue is similar to mine, yes.

Thanks for CC:ing me, and: no, I didn't bring this upstream, as Debian
suggests "Don't file bugs upstream" [1] - the maintainer of a package
cares about forwarding bugs upstream if necessary.


[1] http://www.debian.org/Bugs/Reporting


regards
   Mario
#631791#46
Date:
2023-12-21 17:56:09 UTC
From:
To:
Dear submitter,

as the package pm-utils has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1058701

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)