<?xml version="1.0" encoding="UTF-8" ?>

<bugzilla version="5.2"
          urlbase="https://bugzilla.altlinux.org/"
          
          maintainer="jenya@basealt.ru"
>

    <bug>
          <bug_id>31152</bug_id>
          
          <creation_ts>2015-07-17 18:06:17 +0300</creation_ts>
          <short_desc>to reduce power consumption: Enable Audio codec power management</short_desc>
          <delta_ts>2025-11-14 12:31:09 +0300</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>3</classification_id>
          <classification>Distributions</classification>
          <product>Branch p7</product>
          <component>startup</component>
          <version>не указана</version>
          <rep_platform>all</rep_platform>
          <op_sys>Linux</op_sys>
          <bug_status>CLOSED</bug_status>
          <resolution>WONTFIX</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P3</priority>
          <bug_severity>enhancement</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Ivan Zakharyaschev">imz</reporter>
          <assigned_to name="Andrey Cherepanov">cas</assigned_to>
          
          
          <qa_contact name="qa-p7@altlinux.org">qa-p7</qa_contact>

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>152170</commentid>
    <comment_count>0</comment_count>
    <who name="Ivan Zakharyaschev">imz</who>
    <bug_when>2015-07-17 18:06:17 +0300</bug_when>
    <thetext>startup-0.9.8.38-alt1

According to powertop , on my laptop (Dell Latitude), the things that constantly consumed most power were:

Audio codec hwC0D3: Intel
Audio codec hwC0D0: IDT

and powertop even has a &quot;tunable&quot; to mitigate this problem: &quot;Enable Audio codec power management&quot;, which has a huge effect indeed.

Can&apos;t such a setting be put into the default configuration?</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>152171</commentid>
    <comment_count>1</comment_count>
    <who name="Ivan Zakharyaschev">imz</who>
    <bug_when>2015-07-17 18:34:23 +0300</bug_when>
    <thetext>powertop does this:

echo 1 &gt; /sys/module/snd_hda_intel/parameters/power_save</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>152172</commentid>
    <comment_count>2</comment_count>
    <who name="Ivan Zakharyaschev">imz</who>
    <bug_when>2015-07-17 19:14:30 +0300</bug_when>
    <thetext>(В ответ на комментарий №0)

&gt; the things that
&gt; constantly consumed most power were:

A tiny clarification:

of course, that&apos;s probably not *the* most power consumption, but these things consumed more power than any other thing. (Around 5W-10W)</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>152173</commentid>
    <comment_count>3</comment_count>
    <who name="Ivan Zakharyaschev">imz</who>
    <bug_when>2015-07-17 19:21:03 +0300</bug_when>
    <thetext>(In reply to comment #1)
&gt; powertop does this:
&gt; 
&gt; echo 1 &gt; /sys/module/snd_hda_intel/parameters/power_save

Actually, it&apos;s not a false/true parameter (as I thought).

# modinfo snd_hda_intel
....
parm:           power_save:Automatic power-saving timeout (in second, 0 = disable). (xint)
parm:           power_save_controller:Reset controller in power save mode. (bool)

One may consider other greater number of seconds, too, if one wants to enable power-saving...</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>276953</commentid>
    <comment_count>4</comment_count>
    <who name="Andrey Cherepanov">cas</who>
    <bug_when>2025-11-14 12:31:09 +0300</bug_when>
    <thetext>Продукт более не поддерживается. Если актуально, то необходимо перевешать на новый поддерживаемый репозиторий (p10, p11, Sisyphus).</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>