kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Peter de Kraker, thank you for reporting this and helping make Ubuntu
better. For regression testing purposes, could you please test Precise
via http://releases.ubuntu.com/precise/ ?

In Precise or Saucy, please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect BUGNUMBER
When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

** Tags removed: acer-wmi kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.13-rc3 needs-kernel-logs

** Tags added: regression-potential

** Description changed:

- 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 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. 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.
  
- I blacklisted acer-wmi in /etc/modprobe.d/blacklist.conf and updated
- initramfs. Now ubuntu boots as it should without hanging. No
+ WORKAROUND: 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.

** Changed in: linux (Ubuntu)
   Importance: Medium => Low

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

-- 
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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:
  Incomplete

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. 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.

  WORKAROUND: 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.

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