kernel-packages team mailing list archive

[Thomas Vachon <vachon@xxxxxxxxxxxx>]

The upstream mainline (3.15.0-031500rc2-generic #201404201435) has
seemed to make a difference for the better.  I will continue to monitor.

-- 
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/1319791

Title:
  8086:08b1 [Dell Latitude E7440] WiFi issue

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Using the Intel 7260 AC Wireless chipset, there is a noticeable
  slowdown and multiple disconnection problem. When connected to a
  hotspot it is unusable (multiple disconnections, ICMP times nearly
  8000MS). It does appear to be the chipset specifically, because USB
  tethering or being wired via ethernet do not exhibit this problem, it
  is only using the WiFi chip.

  Intel Corporation Wireless 7260 [8086:08b1] (rev 73)
  Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:4470]

  WORKAROUND: Turn off power management via:
  iwconfig wlan0 power off

  or blacklisting via:
  echo 'HOOK_BLACKLIST="wireless"' > /etc/pm.d/config.d/blacklist

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  vachon    31131 F.... pulseaudio
   /dev/snd/controlC0:  vachon    31131 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Thu May 15 07:39:15 2014
  HibernationDevice: RESUME=UUID=63c1784a-b66a-498f-ac43-5fea2ee96bdc
  InstallationDate: Installed on 2014-04-03 (41 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  MachineType: Dell Inc. Latitude E7440
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=54753b1d-b028-408f-a48d-71e020359a84 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog: May 15 07:36:03 vachon-dbp kernel: [203016.704005] wireshark[2344]: segfault at 7fffe7106ff8 ip 00007fc51ad8bad5 sp 00007fffe7106ff0 error 6 in libc-2.19.so[7fc51ad0b000+1bc000]
  dmi.bios.date: 02/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 091TRH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/18/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn091TRH:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319791/+subscriptions