{"id":686,"date":"2022-11-22T18:36:50","date_gmt":"2022-11-22T18:36:50","guid":{"rendered":"http:\/\/blog.ignoranthack.me\/?p=686"},"modified":"2022-11-22T20:54:28","modified_gmt":"2022-11-22T20:54:28","slug":"more-freebsd-power-saving-notes","status":"publish","type":"post","link":"http:\/\/blog.ignoranthack.me\/?p=686","title":{"rendered":"More #FreeBSD Power Saving Notes"},"content":{"rendered":"\n<p>Its been a while since I needed to be mobile with FreeBSD again.  I remembered that there&#8217;s several out of the box tuning things that you should do in \/etc\/rc.conf and a few modules you should load for your mobile workstation.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/rc.conf:\npowerd_enable=\"YES\"\neconomy_cx_lowest=\"LOW\"\neconomy_cpu_freq=\"LOW\"<\/code><\/pre>\n\n\n\n<p>These will slow your laptop down when running of battery and should give you the needed juice to take notes and update your remote projects.  I wouldn&#8217;t recommend them for a machine you need to do buildworlds upon.  \ud83d\ude42<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/boot\/loader.conf\nacpi_video_load=\"YES\"<\/code><\/pre>\n\n\n\n<p>This one is a module that I forgot about for some time.  If you load it, you&#8217;ll get a couple of new tunables that can be used to turn down the backlight, which is useful even if all you want is to not disturb your better-half when you are reading at night.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl hw.acpi.video\nhw.acpi.video.lcd0.economy: 50\nhw.acpi.video.lcd0.fullpower: 80<\/code><\/pre>\n\n\n\n<p>You can throw these into your \/etc\/sysctl.conf at whatever value you like.  See the man page, <strong><a href=\"https:\/\/www.freebsd.org\/cgi\/man.cgi?acpi_video\">man 4 acpi_video<\/a><\/strong> for more information.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>% acpiconf -i0|less\nDesign capacity:        3900 mAh\nLast full capacity:     3827 mAh\nTechnology:             secondary (rechargeable)\nDesign voltage:         11100 mV\nCapacity (warn):        390 mAh\nCapacity (low):         118 mAh\nLow\/warn granularity:   39 mAh\nWarn\/full granularity:  39 mAh\nModel number:           DELL 9C26T33\nSerial number:          48476\nType:                   LION\nOEM info:               SMP\nState:                  discharging\nRemaining capacity:     52%\nRemaining time:         3:07\nPresent rate:           640 mA (6935 mW)\nPresent voltage:        10837 mV<\/code><\/pre>\n\n\n\n<p>Not too shabby for power savings.  Not sure if .6 Amp is really enough to make this solid.  I think this gives me a solid 4 hours of note taking and walking around.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Its been a while since I needed to be mobile with FreeBSD again. I remembered that there&#8217;s several out of the box tuning things that you should do in \/etc\/rc.conf and a few modules you should load for your mobile workstation. These will slow your laptop down when running of battery and should give you [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"_share_on_mastodon":"1"},"categories":[2],"tags":[],"share_on_mastodon":{"url":"https:\/\/infosec.exchange\/@seanwbruno\/109388903987944227","error":""},"_links":{"self":[{"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/posts\/686"}],"collection":[{"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=686"}],"version-history":[{"count":2,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/posts\/686\/revisions"}],"predecessor-version":[{"id":689,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=\/wp\/v2\/posts\/686\/revisions\/689"}],"wp:attachment":[{"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=686"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.ignoranthack.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}