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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Fixed by upstream commit:

commit feca7746d5d9e84b105a613b7f3b6ad00d327372
Author: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Date:   Fri Mar 1 10:51:15 2013 -0500

    USB: EHCI: don't check DMA values in QH overlays


** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1088733

Title:
  Regression in dib0700 dvb-t driver

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  I have two dib0700-based dvb-t usb tuners. A Sony PlayTV dual tuner,
  and an Asus U3100+ single tuner. Since the 3.2.0-32 kernel, both these
  tuners have been failing to record.

  The problem first appeared with the 3.2.0-32 kernel. Every kernel up
  to 3.2.0-31 has worked, and the problem has persisted with every
  kernel since 3.2.0-32.

  I've bisected the problem down to this commit: 
    http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-precise.git;a=commit;h=1cef533d4e688acbf048b5b32e6f3ca9a265ed4e

  Every build before this works, every one from here on fails.
  Reverting this commit onto the current git head fixes the problem.

  Symptoms: zero-byte recordings. The system wakes via bios timer and
  boots cold form poweroff (not sleeping or hibernating).

  There are no error messages in the kernel logs, syslog, or mythbuntu
  logs.

  This is not 100% failure. If I try to manually kick off a recording,
  or watch live tv, it works some of the time, maybe 25% to 50%. I find
  that if a recording has worked once it will tend to continue to work.
  Care must be taken in testing to avoid false positives.

  Unfortunately I do not have a simple test case. My test case is to
  schedule a series of recordings overnight (usually ten), spaced apart
  so that the machine powers off between recordings.

  When failing, I typically get all recordings zero-byte length. Occasionally one will work.
  When passing, they all work. (Once a month I get a zero-byte recording, but they are pretty rare).

  I get the exact same behaviour between the Asus tuner and the Sony
  tuner, neither one of these appears to be the culprit.

  I'm more than happy to run any test cases for this.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-34-generic-pae 3.2.0-34.53
  ProcVersionSignature: Ubuntu 3.2.0-34.53-generic-pae 3.2.33
  Uname: Linux 3.2.0-34-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu15
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sdt        2034 F.... xfce4-volumed
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'NVidia'/'HDA NVidia at 0xfae78000 irq 21'
     Mixer name	: 'Nvidia MCP79/7A HDMI'
     Components	: 'HDA:10ec0885,18495890,00100101 HDA:10de0007,10de0101,00100100'
     Controls      : 41
     Simple ctrls  : 19
  CurrentDmesg: [   33.456031] eth0: no IPv6 routers present
  Date: Tue Dec 11 11:53:51 2012
  HibernationDevice: RESUME=UUID=cbd9edb8-460f-42e8-acc8-7e325f087a52
  InstallationMedia: Mythbuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 001 Device 003: ID 1415:0003 Nam Tai E&E Products Ltd. or OmniVision Technologies, Inc. 
   Bus 002 Device 002: ID 1997:0409
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm-color
   PATH=(custom, user)
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-34-generic-pae root=UUID=411557e4-14b3-44a5-8100-438f51b49711 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-34-generic-pae N/A
   linux-backports-modules-3.2.0-34-generic-pae  N/A
   linux-firmware                                1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-10-23 (48 days ago)
  UserAsoundrc:
   # # contents of .asoundrc # #
   pcm.!default {
   type plug
   slave.pcm "iec958"
   }
  dmi.bios.date: 08/17/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.20
  dmi.board.name: AMCP7AION-HT
  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.:bvrP1.20:bd08/17/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAMCP7AION-HT: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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