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[Bug 1380076] Re: Can't suspend on Surface Pro 3


it looks like the SP3 legitimately does not expose the S3 state, and instead only allows MS's Connected Standby / InstantGo spec. As such there are two issues here that I can see:
1) pm-utils does not fall back on freeze
2) freeze state is using much more power than connected standby does on windows.

Let's restrict this bug to the first one as it's a couple of lines of
bash to fix. Should I reassign this myself?

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  Can't suspend on Surface Pro 3

Status in “linux” package in Ubuntu:

Bug description:
  Suspend on surface pro 3 from GUI does not work. (Nothing happens)

  Doing it manually also fails, and nothing appears in dmesg:
  #echo "mem" > /sys/power/state

  Error while writing to stdout
  write_loop: Invalid argument

  And, more interestingly,
  #cat /sys/power/state

  freeze disk

  Using the not-so-good-and-apparently-unsupported
  #echo "freeze" > /sys/power/state

  does seem to successfully suspend, however I cannot resume from this
  (assumed to be a separate issue). Likewise, pm-hibernate seems
  somewhat functional.

  I am using a the utopic unicorn kernel compiled from git at
  kernel.ubuntu.com, with a tiny patch that is required for my keyboard
  to work (hard to file bug reports without a keyboard). The official
  kernel behaves identically, as does vanilla 3.17 from the mainline
  folder of kernel-ppa.

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