[Bug 578673] Re: [arrandale] Resume doesn't work on a Latitude E6410

[mikeos]

Radko, your feedback is very appreciated.   For 2.6.35 and older kernels
you need to apply acpi_sleep option into GRUB like this:

1) $ sudo nano /etc/default/grub
2) Search for  GRUB_CMDLINE_LINUX="" and make it look like GRUB_CMDLINE_LINUX="acpi_sleep=nonvs"
3) Save and run: $ sudo update-grub2
4) reboot

(instructions above are valid for GRUB 2 which comes by default since
Lucid i believe)

With 2.6.36 kernels GRUB editing is no longer necessary.
Expected result:  always resumes on AC;  almost always fails on battery-power; always resumes on both AC and batteries with SpeedStep disabled in BIOS.  Disabling SpeedStep (CPU Frequency Scaling) by other methods like forcing CPU governor to performance or unloading cpufreq module (which is not possible on standard recent kernels, because it is no more a separately loadable module) does not have the same effect like disabling SpeedStep in BIOS.

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[arrandale] Resume doesn't work on a Latitude E6410
https://bugs.launchpad.net/bugs/578673
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