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[Peter de Kraker <peterdekraker@xxxxxxxx>]

apport information

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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.
  --- 
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  peter      1729 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=0ef58455-0f7e-412c-865b-a22b63f559d9
  InstallationDate: Installed on 2013-12-19 (0 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Acer Aspire 7740
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=4333334c-62c1-414f-8227-e09a5f9da742 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  Tags:  saucy
  Uname: Linux 3.11.0-14-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/29/2010
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.27
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Aspire 7740
  dmi.board.vendor: Acer
  dmi.board.version: V1.27
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.27
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.27:bd07/29/2010:svnAcer:pnAspire7740:pvrV1.27:rvnAcer:rnAspire7740:rvrV1.27:cvnAcer:ct10:cvrV1.27:
  dmi.product.name: Aspire 7740
  dmi.product.version: V1.27
  dmi.sys.vendor: Acer

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