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[annnomius <annnomius@xxxxxxxxx>]

Public bug reported:

Kernel version 3.13.0-27-generic causes a kernel panic on bootup.
This does not occur with the prior kernel: 3.13.0-24-generic, nor does it occur with recent mainline: 3.15.0-031500rc8-generic_3.15.0-031500rc8.201406012235_amd64

Since this is a panic, I cannot run ubuntu-bug, uname, etc. However, the
output of lspci is attached.

The panic message (painstakingly hand-copied):
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 3.13.0-27-generic #50-Ubuntu
Hardware name: ASUSTeK COMPUTER INC. UX31A/UX31A, BIOS UX31A.216 11/21/2012
0000000000008001  ffff880118f1bdf0  ffffffff817199c4  ffffffff81a3b5d0
ffff880118f1be68  ffffffff81712bc5  ffffffff00000010  ffff880118f1be78
ffff880118f1be18  ffffffff817136e6  ffff880118f1be88  00000000000000cc
Call trace:
<ffffffff817199c4> dump_stack+0x45/0x56
<ffffffff81712bc5> panic+0xc8/0x1d7
<ffffffff817136e6> ? printk+0x67/0x69
<ffffffff81d3646a> mount_block_root+0x225/0x2b0
<ffffffff81d36692> mount_root+0x53/0x56
<ffffffff81d36801> prepare_namespace+0x16c/0x1a4
<ffffffff81d3616e> kernel_init_freeable+0x1f3/0x200
<ffffffff81d358e5> ? do_early_param+0x88/0x88
<ffffffff81707ea0> ? rest_init+0x80/0x80
<ffffffff81707eae> kernel_init+0xe/0x130
<ffffffff8172a2fc> ret_from_fork+0x7c/0xb0
<ffffffff81707ea0> ? rest_init+0x80/0x80

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


** Tags: kernel-fixed-upstream-3.15-rc8

** Attachment added: "lspci results"
   https://bugs.launchpad.net/bugs/1326216/+attachment/4125146/+files/lspci-vvnn.log

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https://bugs.launchpad.net/bugs/1326216

Title:
  Kernel panic (kernel 3.13.0-27-generic) on ASUS UX31A

Status in “linux” package in Ubuntu:
  New

Bug description:
  Kernel version 3.13.0-27-generic causes a kernel panic on bootup.
  This does not occur with the prior kernel: 3.13.0-24-generic, nor does it occur with recent mainline: 3.15.0-031500rc8-generic_3.15.0-031500rc8.201406012235_amd64

  Since this is a panic, I cannot run ubuntu-bug, uname, etc. However,
  the output of lspci is attached.

  The panic message (painstakingly hand-copied):
  Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)
  CPU: 3 PID: 1 Comm: swapper/0 Not tainted 3.13.0-27-generic #50-Ubuntu
  Hardware name: ASUSTeK COMPUTER INC. UX31A/UX31A, BIOS UX31A.216 11/21/2012
  0000000000008001  ffff880118f1bdf0  ffffffff817199c4  ffffffff81a3b5d0
  ffff880118f1be68  ffffffff81712bc5  ffffffff00000010  ffff880118f1be78
  ffff880118f1be18  ffffffff817136e6  ffff880118f1be88  00000000000000cc
  Call trace:
  <ffffffff817199c4> dump_stack+0x45/0x56
  <ffffffff81712bc5> panic+0xc8/0x1d7
  <ffffffff817136e6> ? printk+0x67/0x69
  <ffffffff81d3646a> mount_block_root+0x225/0x2b0
  <ffffffff81d36692> mount_root+0x53/0x56
  <ffffffff81d36801> prepare_namespace+0x16c/0x1a4
  <ffffffff81d3616e> kernel_init_freeable+0x1f3/0x200
  <ffffffff81d358e5> ? do_early_param+0x88/0x88
  <ffffffff81707ea0> ? rest_init+0x80/0x80
  <ffffffff81707eae> kernel_init+0xe/0x130
  <ffffffff8172a2fc> ret_from_fork+0x7c/0xb0
  <ffffffff81707ea0> ? rest_init+0x80/0x80

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