Atom Z500 Series:Reducing power consumption: Difference between revisions
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=Hardware= | =Hardware= | ||
It has the following specs: | It has the following specs: | ||
<pre> | |||
- Intel Atom Z520 (1.33GHz) cpu | - Intel Atom Z520 (1.33GHz) cpu | ||
- 1GB DDR2-800 memory | - 1GB DDR2-800 memory | ||
</pre> | |||
I have replaced the hard drive with a Kingston SNVP325S2128GB SSD. | I have replaced the hard drive with a Kingston SNVP325S2128GB SSD. | ||
Revision as of 21:19, 1 July 2012
I own a Packard bell netbook dot_m.nl/200.
Hardware
It has the following specs:
- Intel Atom Z520 (1.33GHz) cpu - 1GB DDR2-800 memory
I have replaced the hard drive with a Kingston SNVP325S2128GB SSD.
# lspci 00:00.0 Host bridge: Intel Corporation System Controller Hub (SCH Poulsbo) (rev 07) 00:02.0 VGA compatible controller: Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller (rev 07) 00:1b.0 Audio device: Intel Corporation System Controller Hub (SCH Poulsbo) HD Audio Controller (rev 07) 00:1c.0 PCI bridge: Intel Corporation System Controller Hub (SCH Poulsbo) PCI Express Port 1 (rev 07) 00:1c.1 PCI bridge: Intel Corporation System Controller Hub (SCH Poulsbo) PCI Express Port 2 (rev 07) 00:1d.0 USB Controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #1 (rev 07) 00:1d.1 USB Controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #2 (rev 07) 00:1d.2 USB Controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #3 (rev 07) 00:1d.7 USB Controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB EHCI #1 (rev 07) 00:1f.0 ISA bridge: Intel Corporation System Controller Hub (SCH Poulsbo) LPC Bridge (rev 07) 00:1f.1 IDE interface: Intel Corporation System Controller Hub (SCH Poulsbo) IDE Controller (rev 07) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02) 03:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01) # lsusb Bus 001 Device 002: ID 04f2:b175 Chicony Electronics Co., Ltd 4-Port Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Powertop has helped me greatly in finding ways to reduce power consumption.
For now I have the following in my startup:
startup script
# turn the wireless transmit power down to 1 mW iwconfig wlan0 txpower 0 # put the cpu frequency governor "conservative" in charge echo "conservative" >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo "conservative" >/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor # turn down the backlight brightness to somewhat visible echo 6 >/sys/class/backlight/psb-bl/brightness # delay dirty writeback to 15 seconds echo 1500 >/proc/sys/vm/dirty_writeback_centisecs # turn wake up on lan off, so it's really off when it's off ethtool -s eth0 wol d # autosuspend auto (2 sec) for integrated usb hub echo 2 >/sys/bus/usb/devices/1-4/power/autosuspend echo auto >/sys/bus/usb/devices/1-4/power/level # autosuspend on all pci devices for x in /sys/bus/pci/devices/*/power/control; do echo auto >$x ; done # let kernel handle fan control (does this work?) echo enabled >/sys/class/thermal/thermal_zone0/modeAlso
You can not use # turn down the power consumption on the intel SCH ata echo min_power >/sys/class/scsi_host/host0/link_power_management_policy # wlan power timeout to 500ms iwconfig wlan0 power timeout 500ms You should disable the acer_wmi driver, for it interferes with normal backlight operations and does not add anything on this laptop. Also see: - http://www.thinkwiki.org/wiki/How_to_reduce_power_consumption - https://01.org/powertop/ - http://piie.net/files/acerhdf_README.txt