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Thread: Improve battery life and ACPI functions on the macbookpro

  1. #1
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    Improve battery life and ACPI functions on the macbookpro

    I recently got one the newest MacBookPro 13" and after giving a 2 weeks trial period to OSX I decided to switch back to ubuntu and I certainly don't regret it. The only two things I *really* loved in OSX were:

    * longer battery life (apple claims up to 7 hours and my experience is on that line)

    * very fast and efficient suspend/resume

    Those two weren't quite the same in an out-of-the box ubuntu 9.04 installation but with some hacks here and there I got them working not too bad. Here I want to describe what I did and then hopefully with a bit of team work we'll get even better!

    Suspend/Resume

    Suspend and Resume actually didn't work at all after installation. I figured the reason was that I didn't have the latest EFI version. So I rebooted in OSX, did the upgrade to 1.7 and voila. Worked fine.
    They were still a bit slower than OSX, though. Especially resume (which is the one we care the most, of course). To fix it I did the following

    install a package called uswsusp
    Code:
    sudo apt-get install uswsusp
    the package carries two nice tools: s2ram and s2disk
    First of all make sure they work launching
    Code:
    sudo s2ram --force
    to suspend to ram or
    Code:
    sudo s2disk
    to hibernate.

    I personally don't care too much about hibernation. Nice thing about s2ram, though, is that it goes to sleep maintaining somehow the proper wifi settings so that when you open up the lid again the machine is immediately connected to the internet, exactly as it happens in OSX. The resume takes about 5 seconds and you are ready to go.

    By default gnome prompts you with the password after resume. If you don't like this behaviour, you can change it running
    Code:
    gconftool -s /apps/gnome-power-manager/lock/suspend -t bool false
    you can of course use s2ram and s2disk as default tools. to do so, you need to replace two of the existing scripts.
    Code:
    sudo cp /usr/lib/hal/scripts/linux/hal-system-power-hibernate-linux /usr/lib/hal/scripts/linux/hal-system-power-hibernate-linux.bak
    sudo cp /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux.bak
    and then
    Code:
     sudo gedit /usr/lib/hal/scripts/linux/hal-system-power-hibernate-linux
    replace what you find with:
    Code:
    #!/usr/bin/env bash
    /usr/sbin/s2disk
    Code:
     sudo gedit /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux
    replace what you find with:
    Code:
    #!/usr/bin/env bash
    /usr/sbin/s2ram --force
    Restart
    Restart also doesn't seem to work out of the box. With kernels 2.6.28-13 and -14 the system would go throughout the entire rebooting procedure then hang at the very end with "Restarting System". As a workaround, install kexec-tools and make sure it's active. This will enable kexec restart (meaning, when you restart the computer will skip EFI/GRUB and load directly the kernel.
    Code:
    sudo apt-get install kexec-tools
    gedit /etc/default/kexec
    and make sure the load exec is set to True.

    Extend Battery life.


    This is a bit trickier. First of all, we should be aware of what the goal is. Let's learn more about the battery:
    Code:
    gg@ggmac:~$ cat /proc/acpi/battery/BAT0/info 
    present:                 yes
    design capacity:         54500 mWh
    last full capacity:      55300 mWh
    battery technology:      rechargeable
    design voltage:          10950 mV
    design capacity warning: 250 mWh
    design capacity low:     100 mWh
    capacity granularity 1:  10 mWh
    capacity granularity 2:  10 mWh
    model number:            bq20z45189ABCDEF0123456789ABCDE
    serial number:           
    battery type:            LIONz45189ABCDEF0123456789ABCDE
    OEM info:                DPONz45189ABCDEF0123456789ABCDE
    What we are interested in is the total capacity, in my case about 55W.
    Now, we need to know what the consumption is. To do this, the best way is to use powertop
    Code:
    sudo apt-get install powertop
    and then:
    Code:
    powertop -d
    powertop will run for 15 seconds and collect info about the system. There's plenty of documentation out there: go dive. For now let's say what you care the most is this line:
    Code:
    Power usage (ACPI estimate): 16.3W (2.7 hours)
    It says that your laptop consumes about 16W/hour meaning that with a full charge you'd get 55/16=~3.5 hours of battery. Our goal is to go down to something between 9 and 10 W.

    Here's how. First of all, the video. You probably have some new version of the nvidia driver. Open xorg.conf and add the following lines to the section Device:

    Code:
        
    Option "OnDemandVBlankInterrupts" "True"
    Option "RegistryDwords" "PowerMizerLevel=0x3"
    and the following to the section screen:

    Code:
    Option	   "Coolbits" "1"
    these lines will enable VBlankondemand and will set powermizer to "ondemand"; the latter will allow overclocking/downclocking of the GPU.

    After having done this, you want to change a couple of kernel settings.
    Open /boot/grub/menu.list and add to the kernel line the following:
    Code:
    usbcore.autosuspend=1 hpet=force
    so, your kernel line should read something like this:
    Code:
    kernel		(hd0,2)/boot/vmlinuz-2.6.28-13-generic root=/dev/sda3 ro quiet splash usbcore.autosuspend=1 hpet=force vga=791
    Finally, the more juicy part. Create a file called 99-savings
    Code:
    gedit ~/99-savings
    and copy and paste the following code
    Code:
    #!/usr/bin/env bash
    
    # Go fast on AC power.  Similar to default Ubuntu settings
    if on_ac_power; then
      # Set the drive to mostly stay awake.  Some may want to change -B 254
      # to -B 255 to avoid accumulating Load_Cycle_Counts
      hdparm -B 254 -S 240 -M 254 /dev/sda
    
      # Remount ext3 filesystems so the journal commit only happens every 60
      # seconds.  By default this is 5 but, I prefer to reduce the disk
      # activity a bit.
      mount -o remount,commit=60 /
      mount -o remount,commit=60 /home
    
      # Turn off the laptop mode disk optimization
      #echo 0 > /proc/sys/vm/laptop_mode
    
      # Set kernel dirty page value back to default
      echo 10 > /proc/sys/vm/dirty_ratio
      echo 5 > /proc/sys/vm/dirty_background_ratio
    
      # Only wakeup every 60 seconds to see if we need to write dirty pages
      # By default this is every 5 seconds but, I prefer 60 to reduce disk
      # activity.
      echo 6000 > /proc/sys/vm/dirty_writeback_centisecs
    
      # Turn off sound card power savings
      echo 0 > /sys/module/snd_hda_intel/parameters/power_save
      
      # Set the SATA to max performance
      echo max_performance > /sys/class/scsi_host/host0/link_power_management_policy
      echo max_performance > /sys/class/scsi_host/host1/link_power_management_policy
    
      # Make sure ondemand governor is set
      echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
    
      # Enable the webcam driver
    #  modprobe uvcvideo
    
      #restart bluetooth #you can also decide to use RFKILL here. 
      sudo /usr/sbin/hciconfig hci0 up
    
      # Start optional  services
    #  sudo /etc/init.d/cron start
      sudo /etc/init.d/bluetooth start
      sudo /etc/init.d/preload start
    
      #reset brightness of screen and keyboard
      sudo nvclock -S 85
      sudo echo 50 | sudo tee -a /sys/class/leds/smc::kbd_backlight/brightness
    
      #Enable eth0
      sudo ifconfig eth0 up
    
      #reset clock nvidia card (requires coolbits=1)
      sudo nvidia-settings -a GPU2DClockFreqs=100,0
      sudo nvidia-settings -a GPU3DClockFreqs=450,0
    
    else # Save power
    
      # Set the disks to aggressively save power and use the lowest acoustic
      # level.  Some might find these settings too aggressive.  If so, change 
      # "-S 4" to something larger like -S 24 (two minutes) and -B 128 to -B 254.
      hdparm -B 128 -S 4 -M 128 /dev/sda
      
      # Change the ext3 commit times to 10 minutes.  This reduces diskhcd
      # activity
      mount -o remount,commit=600 /
    
      # Set laptop disk write mode
      echo 5 > /proc/sys/vm/laptop_mode
    
      # Manually set the iwl3945 driver to power savings.
      echo 5 > /sys/bus/pci/drivers/iwl????/0000\:??\:00.0/power_level  
    
      # Reduce disk activity by waiting up to 10 minutes before doing writes
      echo 90 > /proc/sys/vm/dirty_ratio
      echo 1 > /proc/sys/vm/dirty_background_ratio
      echo 60000 > /proc/sys/vm/dirty_writeback_centisecs
    
      # Set sound card power savings
      echo 10 > /sys/module/snd_hda_intel/parameters/power_save
    
      # Set SATA to minimum power
      echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
      echo min_power > /sys/class/scsi_host/host1/link_power_management_policy
    
      # Make sure ondemand governor is set
      echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
      
      # Remove the webcam driver
    #  modprobe -r uvcvideo
    
      #Disable eth0
      sudo ifconfig eth0 down
    
      # Stop unneccessary  services
    #  sudo /etc/init.d/cron stop
      sudo /etc/init.d/bluetooth stop
      sudo /etc/init.d/preload stop
    
      #poweroff bluetooth
      sudo /usr/sbin/hciconfig hci0 down
    
      #dim screen and keyboard brightness to minimum
      sudo nvclock -S 15
      sudo echo 0 | sudo tee -a /sys/class/leds/smc::kbd_backlight/brightness
    
      #downclock nvidia card (requires coolbits=1)
      sudo nvidia-settings -a GPU2DClockFreqs=25,0
      sudo nvidia-settings -a GPU3DClockFreqs=125,0
    
    fi
    Most of the content of this script comes from this thread and has been tweaked to my needs. Based on your personal taste you can also decide to uncomment the lines with the load/load video module and cron.

    install the script doing
    Code:
    sudo install 99-savings /etc/pm/sleep.d
    sudo install 99-savings /etc/pm/power.d
    In the thread I linked above you also find a script called 99-nvidia You may want to install that one too.

    Doing so I get a usage of 9.5W, equivalent of about 6 hours. This is with WIFI on, browsing the internet and having the screen brightness very low.
    Still not quite like OSX but not too bad either.

    Let me know how it works for you.
    (YMMV)
    Last edited by crocowhile; October 24th, 2009 at 05:05 PM.

  2. #2
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    Re: Improve battery life and ACPI functions on the macbookpro

    Using laptop-mode can get me 6 hours working!

  3. #3
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    Re: Improve battery life and ACPI functions on the macbookpro

    Quote Originally Posted by hvthao View Post
    Using laptop-mode can get me 6 hours working!
    Switching laptop mode is the first thing I tried but hardly made a difference. I am suprise to hear it does for you. What's your setup?
    I have 9.04, 2.6.28-13

  4. #4
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    Re: Improve battery life and ACPI functions on the macbookpro

    First, enable laptop-mode in /etc/default/acpi-support

    Second, do some configurations in /etc/laptop-mode/conf.d

  5. #5
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    Re: Improve battery life and ACPI functions on the macbookpro

    How would you do the Video CPU tweak if you had the Intel GMA video card as the Macbook2,1's have?

    I followed your directions and it's saving up some watts.
    But I wanted to be more aggressive and save on the GPU unit as well.
    Does the Intel GPU accept underclocking?

    Thanks
    Edgar


    P.S:
    tried going to the Xorg.conf file and it comes out blank, nothing written! is this normal?
    just to check, it is located in /etc/X11/xorg.conf
    Last edited by tripundra; July 19th, 2009 at 06:13 PM.
    Macbook2,1 Black 2Ghz 2Gb Ubuntu9.04 MacOSX

  6. #6
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    Re: Improve battery life and ACPI functions on the macbookpro

    Quote Originally Posted by hvthao View Post
    First, enable laptop-mode in /etc/default/acpi-support
    Second, do some configurations in /etc/laptop-mode/conf.d
    That is what I did but it really doesn't help. Actually all I get is trouble if I touch hal and tty.

    Quote Originally Posted by tripundra View Post
    I followed your directions and it's saving up some watts. But I wanted to be more aggressive and save on the GPU unit as well. Does the Intel GPU accept underclocking?
    Sorry, I don't know.
    Last edited by crocowhile; July 19th, 2009 at 09:57 PM.

  7. #7
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    Re: Improve battery life and ACPI functions on the macbookpro

    Quote Originally Posted by crocowhile View Post
    ...
    The only two things I *really* loved in OSX were:

    * longer battery life (apple claims up to 7 hours and my experience is on that line)

    * very fast and efficient suspend/resume

    Those two weren't quite the same in an out-of-the box ubuntu 9.04 installation but with some hacks here and there I got them working not too bad.
    ...
    Thanks for this. I am about to try this out today on a MPB 5,1. Did anybody else give a try to an MBP 5,1?

    Best regards, Nikos

  8. #8
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    Re: Improve battery life and ACPI functions on the macbookpro

    Quote Originally Posted by hvthao View Post
    First, enable laptop-mode in /etc/default/acpi-support

    Second, do some configurations in /etc/laptop-mode/conf.d
    what configs did you edit in conf.d or does anyone recommend certain ones to do the most good?

  9. #9
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    Re: Improve battery life and ACPI functions on the macbookpro

    @tripundra

    No, I don't think that's normal. It should have some basic settings in there, but a lot of stuff has been moved to the new fdi system. Are you sure you typed in the correct path? Did you make sure to use sudo?
    Macbook 2,1 2.16 Core 2 Duo / 2Gb Ram / 120Gb HDD: Ubuntu Studio 9.04 64 Bit/ Mac OS X 10.4.11

    Registered Linux User # 449355 / Registered Ubuntu User # 16921

  10. #10
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    Re: Improve battery life and ACPI functions on the macbookpro

    Quote Originally Posted by Nikos.Alexandris View Post
    Thanks for this. I am about to try this out today on a MPB 5,1. Did anybody else give a try to an MBP 5,1?

    Best regards, Nikos
    I am unsure if all this is worthy for an MBP5,1 15". The difference is the NVIDIA GeForce 9600M GT graphics in the 15" models. That's actually the "main" problem with respect to battery life.

    Kind regards, Nikos

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