http://bugzilla.kernel.org/show_bug.cgi?id=14462





--- Comment #4 from Zhang Rui <rui.zh...@intel.com>  2009-11-17 03:44:52 ---
I tried to reproduce this bug on a T61 but failed.
And I did find that the led beside the bay is still on if I didn't undock the
bay before suspend.

Then I use a power meter to see the power consumption in S3 state.
1. the power consumption is 1.7w ~ 1.8w if I suspend the laptop directly, 
2. the power consumption is 1.7w ~ 1.8w, while it goes to 1.6w eventually, if I
undock the ultrabay before suspend.
so it seems that the power consumptions are almost the same in these two cases.

(In reply to comment #0)
> A workaround is to manually power-down the drive before suspend via
> /sys/devices/platform/dock.2/undock. This does indeed reduce the power 
> consumed
> while suspended).

I don't know if I reproduced the problem you got on R61, but can you tell me
why you think this reduces the power consumption please?
does the battery work much longer than before?

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