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Power saving setting on my laptop machine Debian Jessie is running on

I have not paid a little effort on power-saving setting of my laptop machine, but I finally made it to some extent.

After searching around the web pages, the article on the https://forums.bunsenlabs.org/viewtopic.php?id=1920 page reminded me of laptop-mode-tool package and tried it.

At first, I installed laptop-mode-tool, rebooted and launched the powertop.
The following screen capture is its screen:

PowerTOP 2.6.1    Overview   Idle stats   Frequency stats   Device stats   Tunab


>> Bad           Wireless Power Saving for interface wlan0                     
   Bad           Enable Audio codec power management
   Bad           Enable SATA link power management for host0
   Bad           Enable SATA link power management for host1
   Bad           Enable SATA link power management for host2
   Bad           Enable SATA link power management for host3
   Bad           NMI watchdog should be turned off
   Bad           VM writeback timeout
   Good          Autosuspend for unknown USB device 1-1 (8087:0020)
   Good          Autosuspend for unknown USB device 2-1 (8087:0020)
   Good          Autosuspend for USB device EHCI Host Controller [usb1]
   Good          Autosuspend for USB device EHCI Host Controller [usb2]
   Good          Runtime PM for PCI Device Intel Corporation Core Processor QPI
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation 82577LM Gigabit Net
   Good          Runtime PM for PCI Device Intel Corporation Core Processor Inte
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation Core Processor DRAM
   Good          Runtime PM for PCI Device Intel Corporation 82801 Mobile PCI Br
   Good          Runtime PM for PCI Device Intel Corporation Mobile 5 Series Chi
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Runtime PM for PCI Device Intel Corporation Core Processor Quic
   Good          Runtime PM for PCI Device Intel Corporation Core Processor Quic
   Good          Runtime PM for PCI Device Intel Corporation 1st Generation Core
   Good          Runtime PM for PCI Device Intel Corporation 1st Generation Core
   Good          Runtime PM for PCI Device Intel Corporation 1st Generation Core
   Good          Runtime PM for PCI Device Intel Corporation Centrino Advanced-N
   Good          Runtime PM for PCI Device Ricoh Co Ltd CardBus bridge
   Good          Runtime PM for PCI Device Ricoh Co Ltd MMC/SD Host Controller
   Good          Runtime PM for PCI Device Intel Corporation 5 Series/3400 Serie
   Good          Wake-on-lan status for device wlan0
   Good          Wake-on-lan status for device eth0



 <ESC> Exit | <Enter> Toggle tunable | <r> Window refresh                      

The laptop-mode-tool was doing good job, but some items remained untuned.
So, as the article suggested, I added the systemd service like:

# cat /etc/systemd/system/powertop.service
[Unit]
Description=Powertop tunings

[Service]
Type=oneshot
RemainAfterExit=no
ExecStart=/usr/sbin/powertop --auto-tune
Environment="TERM=xterm"

[Install]
WantedBy=multi-user.target
and typed:

sudo systemctl enable powertop.service

This brought a complete setting as long as I watched the powertop 'Tunables' tab.
Have fun!

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