Just saying, my HP Pavilion dv6 went from 5 hours of battery life to barely 3 hours...
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What To Do If Still Seeing Poor Linux Battery Life
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Originally posted by LinuxID10T View PostJust saying, my HP Pavilion dv6 went from 5 hours of battery life to barely 3 hours...
Power usage is consistently 6-9 W higher on Linux than on Windows. The system is affected by the kernel commit Michael posted, but ASPM does not really work: half the devices have it disabled even with pcie_aspm=force and it seems to be disabled on Win 7 too. So ASPM is probably not the issue.
Very inexact values measured on AC when idle on desktop and battery full:
17W Win 7 Intel
28W Win 7 AMD
25W Linux Intel (gpu-switcheroo)
37W Linux AMD (gpu-switcheroo)
Linux 3.0-rc5 and all others I have used.
So I have examined both CPU and GPU clock speeds and ASPM but they don't seem to be causing the problem. What else could use so much power?
Note: I have not measured power drain when on battery
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Use powertop (properly) and see how many wakeups from what apps you get.
If you are on the latest Ubuntu I found that UbuntuOne (which I don't use) was causing a huge number of wakeups so that needs to be disabled. But PowerTop will reveal all.
Also enabling power saving modes for most hardware and laptop mode will reduce your power consumption.
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short battery Ubuntu 11.04
After making changes to common line of / etc / default / grub and introduce pcie_aspm = force, as recommended, the line was in this situation:
I GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash pcie_aspm = force"
GRUB_CMDLINE_LINUX = "quiet"
After making these changes improved battery a bit but its spending in windos xp would be about 2 and a half in ubuntu does not come to a full hour
my notebook is: Processor: Intel Atom [email protected] (2 Cores), Motherboard: Acer Aspire One D150, Chipset: Intel Mobile 945GME MCH + ICH7-M, Memory: 2048MB, Disk: 160GB Hitachi HTS54321, Graphics: Intel Mobile 945GME IGP 256MB Audio: Realtek ALC272X
If this helps them I thank you, I am new to ubuntu, and not I know I could do more to help them find a solution to this porblema so serious, and I'm from Spain and their support and collaboration help me a lot
thank you very much
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Originally posted by danwood76 View PostMy laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
Adblock plus well and truley engaged!
But I do have to say that all these Bavaria references kinda get annoying over time.
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I'm the owner of a new dell E6420 laptop (sandybridge cpu) and tested the pcie_aspm=force boot option impact.
Results are here: http://openbenchmarking.org/result/1...MAXR-E6420PO59
Without this option i have the following lines in dmesg:
Code:[ 0.780418] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 3.430392] Unable to assume _OSC PCIe control. Disabling ASPM
Phoronix Test Suite v3.0.1
System Information
Hardware:
Processor: Intel Core i5-2520M @ 2.50GHz (4 Cores), Motherboard: Dell 0K0DNP, Chipset: Intel 2nd Generation Core Family, Memory: 7680MB, Disk: 250GB Western Digital WDC WD2500BEVT-7, Graphics: Intel 2nd Generation Core Family IGP 256MB, Audio: IDT 92HD90BXX
Software:
OS: Ubuntu 11.04, Kernel: 2.6.39-3-generic (x86_64), Desktop: Unity 3.8.16, Display Server: X Server 1.10.1, Display Driver: intel 2.14.0, OpenGL: 2.1 Mesa 7.10.2, Compiler: GCC 4.5.2, File-System: ext4, Screen Resolution: 1600x900
PS: is there a way to remove, rename and reorganize benchmarks on openbenchmarking.org ?
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Originally posted by danwood76 View PostUse powertop (properly) and see how many wakeups from what apps you get.
Code:Suggestion: Enable SATA ALPM link power management via: echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
Linux AMD: 34W
Wakeups-from-idle per second: 6.3 interval: 30.0s
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Hardware:
Code:Processor: Intel Core 2 Duo T6500 @ 2.10GHz (2 Cores), Motherboard: Dell 0D176M, Chipset: Intel Mobile 4 MCH + ICH9M, Memory: 3584MB, Disk: 320GB Seagate ST9320320AS + 160GB Hitachi HTS64161, Graphics: Intel Mobile 4 IGP 256MV, Audio: IDT 92HD73C1X5
Code:OS: Ubuntu 11.04, Kernel: 2.6.38-8-generic (x86_64), Desktop: KDE 4.6.4, Display Server: X Server 1.10.1, Display Driver: intel 2.14.0, Compiler: GCC 4.5.2, File-System: ext4, Screen Resolution:1366x768
Code:OS: Ubuntu 11.04, Kernel: 3.0.0-rc5-customdell1555 (x86_64), Desktop: KDE 4.6.4, Display Server: X Server 1.10.1, Display Driver: intel 2.14.0, Compiler: GCC 4.5.2, File-System: ext4, Screen Resolution:1366x768
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