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[Bug 1190120] Re: Unbind not working as expected

 

Matt Bruzek, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1190120/comments/28
regarding this being addressed via kernel parameter. For future
reference you can manage the status of your own bugs by clicking on the
current status in the yellow line and then choosing a new status in the
revealed drop down box. You can learn more about bug statuses at
https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time
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future bugs you may find.

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

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https://bugs.launchpad.net/bugs/1190120

Title:
  Unbind not working as expected

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  I am trying to unbind a PCI device I received a kernel Oops. I was following instructions described in this KVM document:
  http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM

  When I get to the unbind step:
  echo 0000:01:00.0 > /sys/bus/pci/devices/0000:01:00.0/driver/unbind

  In Raring I got a kernel Oops. Please note at this point I am not
  running the kvm guest, just trying to unbind the PCI device. I do have
  VT-d enabled in the bios and a processor that supports IOMMU. This
  problem is repeatable and appears to be isolated to the unbind
  command.

  However, in Saucy, I do not get a kernel oops, but executing unbind as
  root puts back into non-root user account. After going back as root, I
  am not able to perform the next step to bind the device.

  root@ubuntu:/home/ubuntu# echo 0000:01:00.0 > /sys/bus/pci/drivers/pci-stub/bind
  bash: echo: write error: No such device

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-23-generic 3.8.0-23.34
  ProcVersionSignature: Ubuntu 3.8.0-23.34-generic 3.8.11
  Uname: Linux 3.8.0-23-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  bruzer     2169 F.... pulseaudio
   /dev/snd/controlC1:  bruzer     2169 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Tue Jun 11 21:43:14 2013
  HibernationDevice: RESUME=UUID=4b6b5242-2b8c-46e6-9d91-3168bcee1249
  InstallationDate: Installed on 2013-06-07 (4 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.

   virbr0    no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-23-generic root=UUID=3ee858ac-5064-4c88-b187-2629fedf6f9c ro intel_iommu=on quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-23-generic N/A
   linux-backports-modules-3.8.0-23-generic  N/A
   linux-firmware                            1.106
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/03/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.20
  dmi.board.name: Z87M Extreme4
  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:bd05/03/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ87MExtreme4: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.
  ---
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.336
  DistroRelease: Ubuntu 13.10
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130904)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 1 inteldrmfb
  ProcKernelCmdLine: file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Daemon not responding.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-4-generic N/A
   linux-backports-modules-3.11.0-4-generic  N/A
   linux-firmware                            1.113
  RfKill:

  Tags:  saucy
  Uname: Linux 3.11.0-4-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 07/05/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.60
  dmi.board.name: Z87M Extreme4
  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.:bvrP1.60:bd07/05/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ87MExtreme4: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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