Hi there,
after installing Fedora 17 plus latest updates on my new laptop I had an estimated Battery-Time of roughly 2 hours (display dimmed to minimum, wlan on, internet surfing with chrome).
I tried to increase the Battery-Time by doing the following:
modified fstab (I am using an Intel 520 SSD, no swap drive since I have 16gb mem):
Code:
/dev/mapper/luks-ad7f76c3-2de3-4bd3-a17b-a583e8493b26 / ext4 defaults,noatime,discard 0 1
UUID=f8ac4308-35bb-4b45-a340-8cf8c77edf61 /boot ext4 defaults,noatime,discard 0 1
disabled the discrete gpu (ati 7970m):
Code:
echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch
added the following kernel parameters:
Code:
pcie_aspm=force acpi_osi=Linux i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
finally used powertop to switch all "bad" entries to "good"
The final result for unplugged, min-dimmed usage like websurfing is now at >4 hours (at 70% I still see 3 hours of estimated battery power)
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Now my questions:
- Is there anything which I can do to further increase the battery time?
- Which of the kernel options make no sense, or why do I have to set them manually?
- How can I "automatically" repeat the powertop actions.. why are those not stored/remembered?
- what am I missing
Thx!
EDIT:
I just figured that the kernel param "acpi_backlight=vendor" seems to cause problems in that I cant set the brightness manually anymore.. which is strange because I previously rebooted to with this kernel param and brightness control worked..
Linear Mode
