[Bug 1077519] Re: Modprobe causes kernel NULL pointer crash desktop install

[Jonathan Lynch]

** Attachment added: "IMG_20121110_182557.jpg"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1077519/+attachment/3430037/+files/IMG_20121110_182557.jpg

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Title:
  Modprobe causes kernel NULL pointer crash desktop install

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  While installing 32-bit 12.10 Quantal Quetzal on my Asus M2N-e from
  DVD, the GUI disappears and the error shows:

  [ 1000.576189] BUG: unable to handle kernel NULL pointer dereference at 0000004c
  ...
  [ 1000.576734] Process modprobe (pid: 17582, ti=c6b08000 task=f213bf70 task,ti=c6b08000)
  ...
  [ 1000.576860] Call Trace:
  [ 1000.576877]  [<c1037af8>] ? default_spin_lock_flags+0x8/0x10
  [ 1000.576898]  [<c15c924d>] ? _raw_spin_lock_irqsave+0x2d/0x40
  [ 1000.576916]  [<c105f5e2>] destroy_workqueue+0x12/0x130
  [ 1000.576969]  [<cf90811a4>] ieee80211_unregister_hw+0xd4/0x119 [mac80211]
  [ 1000.576994]  [<fa161dd8>] b43legacy_remove+0x88/0xa0 [b43legacy]

  (The full error is in the attached photo.)

  If I wait a bit and hit ctl+alt+F7 I can get back to the GUI, and the
  status is still "Loading module 'usb-storage' for 'USB storage'...,
  and in the little window below it says:

  Nov 10 22:59:41 ubuntu ubiquity: /bin/check-missing-firmware: 259: /bin/check-missing-firmware: mountmedia: not found
  Nov 10 22:59:41 ubuntu ubiquity: /bin/check-missing-firmware: 267: /bin/check-missing-firmware: mountmedia: not found
  Nov 10 22:59:41 ubuntu kernel: [ 1000.576189] BUG: unable to handle kernel NULL pointer dereference at 0000004c
  (the above dump follows)
  Nov 10 23:23:29 ubuntu kernel: [  925.215855] ---[ end trace 1cadb8b154af9f2e ]---
  Nov 10 23:23:29 ubuntu ubiquity: Killed
  Nov 10 23:23:29 ubuntu acpid: client 2965[0:0] has disconnected
  Nov 10 23:23:29 ubuntu acpid: client connected from 2965[0:0]
  Nov 10 23:23:29 ubuntu acpid: 1 client rule loaded

  And then it just sits there...

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