Thanks! 
Adding acpi_rev_override does the trick!
I set it to "fix released" even if "workaround documented" would be more 
appropriate.


** Changed in: linux (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1678590

Title:
  Dell Inspiron on kernel 4.10 : battery detected only after AC power
  adapter event

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Hi,

  I already reported the bug here:
  http://www.spinics.net/lists/linux-acpi/msg73101.html

  When I boot a Dell 15" serie 7000 with or without it AC power adapter
  no battery is detected:

  acpi -i -b -a
  Adapter 0: off-line

  As soon as I plug or unplug the AC adapter, the battery is detected:
  acpi -i -b -a
  Battery 0: Charging, 62%, 01:13:00 until charged
  Battery 0: design capacity 3950 mAh, last full capacity 3850 mAh = 97%
  Adapter 0: on-line

  cat /proc/cmdline

  BOOT_IMAGE=/boot/vmlinuz-4.10.0-13-generic root=UUID=42930a1e-fbdc-
  4cd8-a1d2-caf2bd33de1b ro acpi_osi=Linux quiet splash vt.handoff=7

  
  I've tried with and without acpi_osi=Linux but it makes no difference.

  Attached : dmesg and dsdt in 
http://www.spinics.net/lists/linux-acpi/msg73101.html
  I think that acpi_osi=Linux used to do the trick but it does not work on 
vmlinuz-4.10.0-13-generic

  Xavier
  --- 
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0p:   xavier     1473 F...m pulseaudio
   /dev/snd/controlC1:  xavier     1473 F.... pulseaudio
   /dev/snd/controlC0:  xavier     1473 F.... pulseaudio
  DistroRelease: Ubuntu 17.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=31a2d0a3-34b9-467d-8c4d-f226cc825604
  InstallationDate: Installed on 2017-03-28 (5 days ago)
  InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170321)
  MachineType: Dell Inc. Inspiron 7537
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-13-generic 
root=UUID=42930a1e-fbdc-4cd8-a1d2-caf2bd33de1b ro acpi_osi=Linux quiet splash
  ProcVersionSignature: Ubuntu 4.10.0-13.15-generic 4.10.1
  RelatedPackageVersions:
   linux-restricted-modules-4.10.0-13-generic N/A
   linux-backports-modules-4.10.0-13-generic  N/A
   linux-firmware                             1.164
  Tags:  zesty
  Uname: Linux 4.10.0-13-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
  _MarkForUpload: True
  dmi.bios.date: 10/04/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A14
  dmi.board.name: 03HR9V
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: 
dmi:bvnDellInc.:bvrA14:bd10/04/2016:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn03HR9V:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Inspiron 7537
  dmi.sys.vendor: Dell Inc.

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