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[Kai Lochbaum <klochbaum@xxxxxxxxx>]

I can confirm that with the saucy daily from 20130910 with kernel 3.11.0-7 the wifi works fine until you change the power mode/use the surface without power.
I'm getting a kernel bug at that point which disables the wifi. plugging the power back i does notsolve the issue.
Also the system hangs on the login screen after booting on battery power.

My temp fix for both problems is to disable the /usr/lib/pm-tools/power.d/usb_bluetooth script,
Anyone having a similar problem or should i file a completely new bug?

** Attachment added: "kern.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1165938/+attachment/3818235/+files/kern.log

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https://bugs.launchpad.net/bugs/1165938

Title:
  1286:2044 [Microsoft Surface Pro] Marvell 88W8797  wifi does not work

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  The wifi/bluetooth chip that the MS Surface Pro uses, a Marvell
  avastar 88W8797, does not work properly under Ubuntu 12.10 or 13.04.
  On 13.04, it will be reported three times in the network manager and
  any attempt to connect to any network will fail, regardless of the
  settings of the network.  Additionally attempting to connect to any of
  the three listed connections will cause the system to hang on
  shutdown, as well as any attempt to read the state of the network.

  ====================================================
  Here is the output of modinfo mwifiex_usb:

  filename:       /lib/modules/3.8.0-16-generic/kernel/drivers/net/wireless/mwifiex/mwifiex_usb.ko
  firmware:       mrvl/usb8797_uapsta.bin
  license:        GPL v2
  version:        1.0
  description:    Marvell WiFi-Ex USB Driver version1.0
  author:         Marvell International Ltd.
  srcversion:     73D8AC7543BD1766913AD58
  alias:          usb:v1286p2044d*dc*dsc*dp*icFFiscFFipFFin*
  alias:          usb:v1286p2043d*dc*dsc*dp*ic*isc*ip*in*
  depends:        mwifiex
  intree:         Y
  vermagic:       3.8.0-16-generic SMP mod_unload modversions

  ====================================================
  Here is the output of ls /lib/firmware/mrvl:

  total 1656
  drwxr-xr-x  2 root root   4096 Mar 28 13:01 ./
  drwxr-xr-x 57 root root   4096 Apr  4 22:22 ../
  -rw-r--r--  1 root root 259172 Mar 28 13:01 sd8688.bin
  -rw-r--r--  1 root root   2616 Mar 28 13:01 sd8688_helper.bin
  -rw-r--r--  1 root root 447384 Mar 28 13:01 sd8787_uapsta.bin
  -rw-r--r--  1 root root 458108 Mar 28 13:01 sd8797_uapsta.bin
  -rw-r--r--  1 root root 508372 Mar 28 13:01 usb8797_uapsta.bin
  ---
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  shane      1969 F.... pulseaudio
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=ddf15760-30b8-411f-86aa-9ae11944706e
  InstallationDate: Installed on 2013-03-27 (12 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130327)
  MachineType: Microsoft Corporation Surface with Windows 8 Pro
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: ro root=/dev/sda7 initrd=boot\initrd.img-3.8.0-17-generic
  ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-17-generic N/A
   linux-backports-modules-3.8.0-17-generic  N/A
   linux-firmware                            1.104
  Tags:  raring
  Uname: Linux 3.8.0-17-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 01/22/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.01.0150
  dmi.board.asset.tag: 0
  dmi.board.name: Surface with Windows 8 Pro
  dmi.board.vendor: Microsoft Corporation
  dmi.board.version: 1
  dmi.chassis.asset.tag: 0
  dmi.chassis.type: 17
  dmi.chassis.vendor: Microsoft Corporation
  dmi.chassis.version: 1
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.01.0150:bd01/22/2013:svnMicrosoftCorporation:pnSurfacewithWindows8Pro:pvr1:rvnMicrosoftCorporation:rnSurfacewithWindows8Pro:rvr1:cvnMicrosoftCorporation:ct17:cvr1:
  dmi.product.name: Surface with Windows 8 Pro
  dmi.product.version: 1
  dmi.sys.vendor: Microsoft Corporation

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