El día Tuesday, April 01, 2014 a las 08:38:28AM +0100, David Chisnall escribió: > > Just a small note here: Improving power management is something that the Core Team and the Foundation have jointly identified as an important goal, in particular for mobile / embedded scenarios. We're currently coordinating potential sponsors for the work and soliciting proposals from people interested in doing the work. If you know of anyone in either category then please drop either me, core, or the Foundation an email. > Hello, Using every day one of my FreeBSD netbooks (see below), I know very well that improving power management and by this the uptime while running on battery is a serious issue. I'm currently surprised about the big diff between two of my netbooks, one running 1 hour only while the other runs ~4 hours. I'm thinking about building a cable connection between the battery and the netbooks to measure the exact power drain (normally one can not see this because the battery is connected into its bay and you can not put any meter in there). I'm an experienced C-programmer and long time FreeBSD user and tester and I'm willing to dig deeper into this work. Please let me know if there is something to work on. Attached below is a description of the two mentioned netbooks and their uptime values. Thanks matthias comparing battery life time of [EeePC 900] and [Acer Aspire One D250] | EeePC 900 | Acer Aspire One D250 ----------+-----------------------------+------------------------------------ CPU | 900 MHz Intel Celeron M 353 | 2x Intel Atom CPU N270 _at_ 1.60GHz RAM | 2 GByte | 1 GByte disk | 2x SSD (4 GB, 16 GB) | WDC WD2500BEVT-22ZCT0 11.01A11 | | ATA-8 SATA 2.x, 238475MB display | TFT 1024x600 9" | TFT 1024x600 10" FreeBSD | 10-CURRENT r255948 | 10-CURRENT r250588 KDE | 4.10.5 | 3.5.10 WAN (UMTS)| USB u3g Huawei E1750 | USB u3g Huawei E1750 ----------+-----------------------------+------------------------------------ battery | Li-ion A22-701 7.4V 7200mAh | Li-ion UM08B74 11.1V 5200mAh / 54Wh | 53.380Wh | 57.720Wh ----------+-----------------------------+------------------------------------ uptime | ~1 hours | ~4 hours ----------+-----------------------------+------------------------------------ -- Matthias Apitz | /"\ ASCII Ribbon Campaign: E-mail: guru_at_unixarea.de | \ / - No HTML/RTF in E-mail WWW: http://www.unixarea.de/ | X - No proprietary attachments phone: +49-170-4527211 | / \ - Respect for open standards | en.wikipedia.org/wiki/ASCII_Ribbon_CampaignReceived on Sat May 03 2014 - 13:58:01 UTC
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