pepre, thank you for your response. Regarding your comments 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1077718/comments/7 :
>"Christopher M. Penalver (penalvch) wrote: > If you uninstall both the nvidia 
>driver, and virtualbox, do you still then get errors? It's a multiseat 
>multihead environment, used 24/7 by multiple users. If i disable this by 
>uninstalling the modules they will eat me."

I beg your pardon as this being a multiseat, multihead environment was
not known. If it is too onerous to remove nvidia and/or virtualbox then
let us place this request on hold.

"But whatever: if 3.4.0-030400 doesn't boot 3.7.0-x will not boot in all
probability."

This is not something I could agree to, as we have not removed the
requested modules and then tested for this problem.

I'll mark this Confirmed as per above.

Thank you for your understanding.

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

** Description changed:

- As told in 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/550559/comments/132 
"ubuntu-bug linux"
+ The machine affected is a multiseat multihead environment, used 24/7 by
+ multiple users.
+ 
  READ FPDMA QUEUED
  
  $ dmesg
  ...
  [ 7231.840104] ata7.00: exception Emask 0x0 SAct 0x2 SErr 0x0 action 0x6 
frozen
  [ 7231.840114] ata7.00: failed command: READ FPDMA QUEUED
  [ 7231.840121] ata7.00: cmd 60/10:08:00:9e:28/00:00:02:00:00/40 tag 1 ncq 
8192 in
  [ 7231.840122]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 
(timeout)
  [ 7231.840126] ata7.00: status: { DRDY }
  [ 7231.840131] ata7: hard resetting link
  [ 7232.168099] ata7: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
  [ 7232.168918] ata7.00: configured for UDMA/100
  [ 7232.168927] ata7.00: device reported invalid CHS sector 0
  [ 7232.168936] ata7: EH complete
  ...
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-32-generic 3.2.0-32.51
  ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
  Uname: Linux 3.2.0-32-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: M1010LT [M Audio Delta 1010LT], device 0: ICE1712 multi [ICE1712 
multi]
     Subdevices: 0/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu14
  Architecture: amd64
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'M1010LT'/'M Audio Delta 1010LT at 0xe800, irq 20'
     Mixer name : 'ICE1712 - multitrack'
     Components : ''
     Controls      : 85
     Simple ctrls  : 57
  Card1.Amixer.info:
   Card hw:1 'CX8801'/'Conexant CX8801 at 0xfc000000'
     Mixer name : 'CX88'
     Components : ''
     Controls      : 3
     Simple ctrls  : 2
  Card2.Amixer.info:
   Card hw:2 'CX8801_1'/'Conexant CX8801 at 0xf8000000'
     Mixer name : 'CX88'
     Components : ''
     Controls      : 3
     Simple ctrls  : 2
  Date: Sun Nov 11 22:07:36 2012
  HibernationDevice: RESUME=UUID=c411ec14-1be9-42c4-b4eb-f043f9db1a04
  InstallationMedia: Ubuntu-Server 12.04.1 LTS "Precise Pangolin" - Release 
amd64 (20120817.3)
  IwConfig:
   lo        no wireless extensions.
  
   eth0      no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcEnviron:
   TERM=xterm
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-32-generic 
root=UUID=0af826ac-6e4a-4acc-9716-4e6a059ad9af ro noplymouth vga=795
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-32-generic N/A
   linux-backports-modules-3.2.0-32-generic  N/A
   linux-firmware                            1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/26/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.40
  dmi.board.name: A770DE+
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd11/26/2009:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnA770DE+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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https://bugs.launchpad.net/bugs/1077718

Title:
  READ FPDMA QUEUED

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