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[Bug 1349572] Re: Wireless network disconnections on Dell XPS 13

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: gronki <gronki@xxxxxxxxx>
Date: Sat, 20 Jun 2015 10:21:04 -0000
Reply-to: Bug 1349572 <1349572@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
On my Dell Inspiron 7537 the wifi is working very well on 3.16 (trusty),
however I experience frequent disconnections on 3.19 kernel (vivid).
After I get disconnected, no APs are visible by Unity wifi applet.
However, using wavemon to connect to a network "fixes" everything for
about 1 hour. Switching off wifi power saving helps. I'm wondering why
everything works well on the 3.16 but I  have issues on 3.19.

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https://bugs.launchpad.net/bugs/1349572

Title:
  Wireless network disconnections on Dell XPS 13

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Utopic:
  Fix Released

Bug description:
  SRU Justification

  Impact: Many users with Intel 7260 wireless are seeing relatively
  frequent disconnections as a result of the firmware reporting loss of
  beacons from the access point.

  Fix: Two upstream backports, one which waits for several lost beacon
  reports before reporting beacon loss to mac80211, and another which
  fixes a bug with mac80211's handling of beacon loss reports from some
  drivers (in particular iwlwifi).

  Test Case: Tested on LP#1349572.

  Regression Potential: These patches were merged upstream in 3.14 and
  3.15 without any reported regressions.

  ---

  With kernel 3.13.0.30 and 22.1.7.0, there are lots of wireless disconnections.
  Tested also with kernel 3.13.0.32 and 22.24.8.0 , also lots of wireles disconnections.

  The AP is an ASL-26555 from Movistar(Spain). Firmware version:
  v2.0.0.51B_ESv6

  Seems that when the computer is working for some time it is more easy
  to reproduce this beahviour.

  Added this bug as sugested in #1293569, comment #91.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-30-generic 3.13.0-30.55
  ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  marcel     2611 F.... pulseaudio
   /dev/snd/controlC0:  marcel     2611 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Jul 28 22:20:19 2014
  HibernationDevice: RESUME=UUID=01981495-0235-4fdf-b7c6-c6191e986cec
  InstallationDate: Installed on 2014-01-23 (186 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. XPS13 9333
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=9d324637-b4a0-4800-a447-d17e20b708f3 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-30-generic N/A
   linux-backports-modules-3.13.0-30-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-17 (101 days ago)
  dmi.bios.date: 12/11/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A02
  dmi.board.name: 0GFTRT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA02:bd12/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.
  ---
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  marcel     2644 F.... pulseaudio
   /dev/snd/controlC0:  marcel     2644 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=01981495-0235-4fdf-b7c6-c6191e986cec
  InstallationDate: Installed on 2014-01-23 (187 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. XPS13 9333
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=9d324637-b4a0-4800-a447-d17e20b708f3 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  Tags:  trusty
  Uname: Linux 3.13.0-32-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-04-17 (103 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
  _MarkForUpload: True
  dmi.bios.date: 12/11/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A02
  dmi.board.name: 0GFTRT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA02:bd12/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.
  ---
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  marcel     2644 F.... pulseaudio
   /dev/snd/controlC0:  marcel     2644 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=01981495-0235-4fdf-b7c6-c6191e986cec
  InstallationDate: Installed on 2014-01-23 (187 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. XPS13 9333
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=9d324637-b4a0-4800-a447-d17e20b708f3 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  Tags:  trusty
  Uname: Linux 3.13.0-32-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-04-17 (103 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
  _MarkForUpload: True
  dmi.bios.date: 12/11/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A02
  dmi.board.name: 0GFTRT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA02:bd12/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.

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References

[Bug 1349572] [NEW] Wireless network disconnections on Dell XPS 13
From: Marcel Miguel, 2014-07-28