arty, thank you for reporting this and helping make Ubuntu better. Could
you please advise if the firmware of your router is the latest Version
(1.01.009) as per
http://hilfe.telekom.de/hsp/cms/content/HSP/de/3388/FAQ/theme-293811306/Speedport-W
-723V-Typ-A ?

If not, could you please update it to it, and advise if this changes
anything?

** Description changed:

- My problem seems to be different from #1315221 because it exists in
- 3.16.0-28-generic (Ubuntu 14.10). It is also different from #1405298
- because it happens with the latest BIOS upgrade. dmidecode returns
- version A11 and date 12/03/2014
- 
  About every 10 minutes my WiFi disconnects and a line like this appears in 
syslog:
  Dec 24 11:31:31 work kernel: [ 2721.017478] wlan0: deauthenticated from 
10:c6:1f:2c:49:56 (Reason: 7=CLASS3_FRAME_FROM_NONASSOC_STA)
  
  It is accompanied later by such line:
  Dec 24 11:31:46 work NetworkManager[902]: <info> (wlan0): device state 
change: activated -> failed (reason 'SSID not found') [100 120 53]
  
  The network disappears from the list and only becomes visible after I
  disable and re-enable networking via the network applet.
  
  I don't remember seeing this problem at work where they use Cisco
  routers. I see the problem at home with my Speedport 723V Typ A router
  (a+b+n mode, WPA2). This may be affected by number of other wifi
  networks which are visible here: at least 17 at the moment.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-28-generic 3.16.0-28.38
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC1:  treguben   2520 F.... pulseaudio
-  /dev/snd/controlC0:  treguben   2520 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC1:  treguben   2520 F.... pulseaudio
+  /dev/snd/controlC0:  treguben   2520 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Dec 24 15:06:25 2014
  HibernationDevice: RESUME=UUID=82445dd2-3bcf-42f7-ae59-4fba694e25de
  InstallationDate: Installed on 2014-12-11 (12 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: Dell Inc. Precision M4800
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic.efi.signed 
root=UUID=9a116abe-59b9-48b8-abe4-5064a191ac51 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.16.0-28-generic N/A
-  linux-backports-modules-3.16.0-28-generic  N/A
-  linux-firmware                             1.138
+  linux-restricted-modules-3.16.0-28-generic N/A
+  linux-backports-modules-3.16.0-28-generic  N/A
+  linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/03/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0T3YTY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd12/03/2014:svnDellInc.:pnPrecisionM4800:pvr01:rvnDellInc.:rn0T3YTY:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Precision M4800
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

** Tags added: latest-bios-a11

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

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

** Summary changed:

- [Dell M4800, A11 BIOS]: iwlwifi regularly loses connection on Intel 7260 
+ [Dell Precision M4800] iwlwifi regularly loses connection on Intel 7260

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https://bugs.launchpad.net/bugs/1405437

Title:
  [Dell Precision M4800] iwlwifi regularly loses connection on Intel
  7260

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