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[Peter de Kraker <peterdekraker@xxxxxxxx>]

Public bug reported:

I have a Acer Aspire 7740, and noticed after installing that Ubuntu 13.10 (kernel 3.11.0-14) hangs for 10 seconds early in the boot process. It continues after that. 
The screen freezes and the fans start spinning very hard. 
The last dmesg line before the pause is a info message about acer-wmi.

I blacklisted acer-wmi in /etc/modprobe.d/blacklist.conf and updated
initramfs. Now ubuntu boots as it should without hanging. No
functionality appears to be lost. Bluetooth and wifi work, also the
volume keys.

When modprobing this module after boot the same symptoms occur. Ubuntu
hangs, and reacts normally after 10 seconds.

So, clearly something is wrong with acer-wmi. Maybe it should not be
loaded with this laptop version, or it has a bug in it.

I will add a dmesg from a boot with acer-wmi enabled.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: acer-wmi

** Attachment added: "lspci-vnvn.log"
   https://bugs.launchpad.net/bugs/1262797/+attachment/3932687/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1262797

Title:
  acer-wmi module hangs laptop for 10 seconds on boot/modprobe

Status in “linux” package in Ubuntu:
  New

Bug description:
  I have a Acer Aspire 7740, and noticed after installing that Ubuntu 13.10 (kernel 3.11.0-14) hangs for 10 seconds early in the boot process. It continues after that. 
  The screen freezes and the fans start spinning very hard. 
  The last dmesg line before the pause is a info message about acer-wmi.

  I blacklisted acer-wmi in /etc/modprobe.d/blacklist.conf and updated
  initramfs. Now ubuntu boots as it should without hanging. No
  functionality appears to be lost. Bluetooth and wifi work, also the
  volume keys.

  When modprobing this module after boot the same symptoms occur. Ubuntu
  hangs, and reacts normally after 10 seconds.

  So, clearly something is wrong with acer-wmi. Maybe it should not be
  loaded with this laptop version, or it has a bug in it.

  I will add a dmesg from a boot with acer-wmi enabled.

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