kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I'd like to perform a reverse bisect to figure out which commit upstream
fixes this regression. It would be very helpful to know the last
upstream kernel that had this issue and the first kernel that did not.

Can you test the following kernels and report back?

v3.13.11.10: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.10-trusty/
v3.13.11.11: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.11-trusty/

linux-image-3.13.0-40-generic was based on the upstream 3.13.11.10
kernel, so that upstream kernel should not have the bug.  If it doesn't,
we can bisect betwee 3.13.11.10 and 3.13.11.11.

** Tags added: performing-bisect

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https://bugs.launchpad.net/bugs/1398585

Title:
  [Inter 7260] Very slow and unstable WIFI

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Using an Asus Zenbook UX303L, with the last kernel, wifi is almost
  unusable. The connection is VERY slow and keeps dropping.

  There was absolutely no problem with the linux-image-3.13.0-40-generic
  kernel.

  Tried turning off the power management of wlan0 without any changes.

  lspci -knn | grep Net -A2

  02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 6b)
      Subsystem: Intel Corporation Dual Band Wireless-N 7260 [8086:c160]
      Kernel driver in use: iwlwifi

  Here is the speedtest output with the last kernel:

  ☺  ~⮀ speedtest
  Retrieving speedtest.net configuration...
  Retrieving speedtest.net server list...
  Testing from Orange (***)...
  Selecting best server based on latency...
  Hosted by iperf.fr (Rouen) [315.45 km]: 15.149 ms
  Testing download speed........................................
  Download: 19.17 Mbits/s
  Testing upload speed..................................................
  Upload: 30.53 Mbits/s

  And after a rollback on the 3.13

  ☺  ~⮀ speedtest
  Retrieving speedtest.net configuration...
  Retrieving speedtest.net server list...
  Testing from Orange (***)...
  Selecting best server based on latency...
  Hosted by TestDebit.info (Limoges) [264.48 km]: 13.848 ms
  Testing download speed........................................
  Download: 61.95 Mbits/s
  Testing upload speed..................................................
  Upload: 71.33 Mbits/s

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-25-generic 3.16.0-25.33~14.04.2
  ProcVersionSignature: Ubuntu 3.16.0-25.33~14.04.2-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Tue Dec  2 22:39:01 2014
  InstallationDate: Installed on 2014-11-20 (12 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  bruce      2241 F.... pulseaudio
   /dev/snd/pcmC1D0p:   bruce      2241 F...m pulseaudio
   /dev/snd/controlC1:  bruce      2241 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=8a3f827c-19e2-473a-aeef-d988e7b1be88
  InstallationDate: Installed on 2014-11-20 (12 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: ASUSTeK COMPUTER INC. UX303LN
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-25-generic root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash acpi_osi= vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-25.33~14.04.2-generic 3.16.7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.127.8
  Tags:  trusty
  Uname: Linux 3.16.0-25-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 06/23/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX303LN.203
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX303LN
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LN.203:bd06/23/2014:svnASUSTeKCOMPUTERINC.:pnUX303LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX303LN
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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