kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Giovanni, thank you for reporting this and helping make Ubuntu better.
The next step is to fully reverse commit bisect from kernel 3.16 to
3.18-rc5 in order to identify the last bad commit, followed immediately
by the first good one. Once this commit has been identified, then it may
be reviewed as a candidate for backporting into your release. Could you
please do this following
https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F
?  Please note, finding adjacent kernel versions is not fully commit
bisecting.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Tags added: kernel-fixed-upstream kernel-fixed-upstream-3.18-rc5
latest-bios-a10 needs-reverse-bisect

** Tags added: regression-release

** Description changed:

  Using kernel 3.16 the wireless connections on 802.11n networks are very
  unstable and they fail after few minutes. Even if the NetworkManager
  says that it is still connected, nothing works and I have to manually
- disconnect and connect again. And so on.
+ disconnect and re-connect.
  
- The problem was not present in kernel 3.14 (i.e. in Ubuntu 14.04) and
- seems to be resolved in 3.18-rc5, even if in this case the connections
- seem to be slower (but stable).
+ The problem was not present in in Ubuntu 14.04 and seems to be resolved
+ in 3.18-rc5, even if in this case the connections seem to be slower (but
+ stable).
  
- The solution (or better, the workaround) that has been proposed in
- askubuntu does not work for me ( http://askubuntu.com/questions/544074
- /unstable-wireless-in-ubuntu-14-10 ).
- 
- I have no problem with older wifi standard: if I set my router to not
- use the 11n standard, it works perfectly.
+ WORKAROUND: Use 802.11g.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-25-generic 3.16.0-25.33
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  giovanni   2688 F.... pulseaudio
   /dev/snd/controlC0:  giovanni   2688 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Nov 22 10:37:46 2014
  HibernationDevice: RESUME=UUID=baeb85bd-8e5b-442a-8850-5335ad563c98
  InstallationDate: Installed on 2014-10-06 (46 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 7537
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic.efi.signed root=UUID=e4cc7fd4-702d-44e9-ac9b-8bd4c776c85c ro quiet splash acpi_osi=Linux vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-10-30 (22 days ago)
  WifiSyslog: Nov 22 10:37:21 inspiron kernel: [  940.511342] mmc0: card d555 removed
  dmi.bios.date: 07/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 038M0M
  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.:bvrA10:bd07/18/2014:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn038M0M:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Inspiron 7537
  dmi.sys.vendor: Dell Inc.

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1395284

Title:
  Unstable wireless connections with 802.11n and kernel 3.16

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Using kernel 3.16 the wireless connections on 802.11n networks are
  very unstable and they fail after few minutes. Even if the
  NetworkManager says that it is still connected, nothing works and I
  have to manually disconnect and re-connect.

  The problem was not present in in Ubuntu 14.04 and seems to be
  resolved in 3.18-rc5, even if in this case the connections seem to be
  slower (but stable).

  WORKAROUND: Use 802.11g.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-25-generic 3.16.0-25.33
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  giovanni   2688 F.... pulseaudio
   /dev/snd/controlC0:  giovanni   2688 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Nov 22 10:37:46 2014
  HibernationDevice: RESUME=UUID=baeb85bd-8e5b-442a-8850-5335ad563c98
  InstallationDate: Installed on 2014-10-06 (46 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 7537
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic.efi.signed root=UUID=e4cc7fd4-702d-44e9-ac9b-8bd4c776c85c ro quiet splash acpi_osi=Linux vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-10-30 (22 days ago)
  WifiSyslog: Nov 22 10:37:21 inspiron kernel: [  940.511342] mmc0: card d555 removed
  dmi.bios.date: 07/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 038M0M
  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.:bvrA10:bd07/18/2014:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn038M0M:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Inspiron 7537
  dmi.sys.vendor: Dell Inc.

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