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[Mauro <1313196@xxxxxxxxxxxxxxxxxx>]

Hi Christopher, I will try to do my best.

First of all, what about my considerations on the acpi_osi kernel boot
parameter?

Secondly, I did a "binary search" of the first mainline kernel version
which works. The result is not so linear. I'll explain.

Version 3.11.2 (package name mentions 3.13.11-03131102.201405081435)
still has the problem

>From 3.14-rc1 onwards, the problem is fixed. However... with 3.14-rc1, 3.14-rc2 and 3.14-rc3 if I type:
sudo rfkill list
I see an output which is similar to what I get if I specify the acpi_osi boot parameter with 3.11 kernel, that is I get the hp-wifi and hp-bluetooth entries and the switch applies a hard block rather than a soft block. The only difference is that the hci0 does not disappear when the wifi card is disabled.
>From 3.14-rc4 onwards, the problem is still fixed, but if I type rfkill list, I see the output that I get with 3.15-rc2, that is without the hp-* entries. Also, the wifi switch button produces a soft block instead of a hard block.

This makes me think that there are at least two commits (one for 3.14-rc1 and one for 3.14-rc4) that in some way have effects on this.
Any suggestion?

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https://bugs.launchpad.net/bugs/1313196

Title:
  [HP ProBook 450 G1 Notebook PC] Wireless switch not working

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  This system has a button to enable and disable the WLAN interface. This button has a LED on it: it's white when the WLAN is enabled, orange when it is not. Pressing this button, however, does not have any effect on both Ubuntu 13.10 and Mint 16 KDE (which is also based on Ubuntu 13.10). When I press this button, the following output is produced in dmesg:
  [ 1536.228861] atkbd serio0: Unknown key pressed (translated set 2, code 0xf8 on isa0060/serio0).
  [ 1536.228872] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.
  [ 1536.308669] atkbd serio0: Unknown key released (translated set 2, code 0xf8 on isa0060/serio0).
  [ 1536.308680] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.

  There's just a minor difference in behavior between Ubuntu and Mint:
  while in Mint the led correctly turns white when the WLAN interface is
  enabled (and the outcome of "rfkill block/unblock" is correctly
  reflected by the button led color), in Ubuntu this led seems to always
  stay orange, even if the WLAN interface is active (and connection is
  correctly established). Please note that I only tried to run Ubuntu
  from a USB stick (no installation at all, no update performed).

  WORKAROUND: I can use rfkill block/unblock to enable/disable the WLAN
  interface.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-12-generic 3.11.0-12.19
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     2907 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     2907 F.... pulseaudio
  CasperVersion: 1.336ubuntu1
  Date: Sat Apr 26 20:39:42 2014
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Hewlett-Packard HP ProBook 450 G1
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash --
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/13/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L74 Ver. 01.08
  dmi.board.name: 1942
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 89.10
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL74Ver.01.08:bd02/13/2014:svnHewlett-Packard:pnHPProBook450G1:pvrA3009DD10303:rvnHewlett-Packard:rn1942:rvrKBCVersion89.10:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ProBook 450 G1
  dmi.product.version: A3009DD10303
  dmi.sys.vendor: Hewlett-Packard

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