8086:422b Intel Centrino Ultimate-N 6300 - Packet loss/dropout using WiFi-N

[Shaawin Vsingam]

Exists on all kernels, ubuntu and mainline.

WORKAROUND: If mobprobe iwlwifi 11n_disable=1 is used, hence fallback to G, connection is stable/no packet loss.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-19-generic 3.13.0-19.39
ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: shaawin 1850 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Mar 24 22:50:32 2014
InstallationDate: Installed on 2014-03-20 (3 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140319)
MachineType: CLEVO CO. W55xEU
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-19-generic.efi.signed root=UUID=a97391c3-cdbf-4469-9b14-220e01582835 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-19-generic N/A
 linux-backports-modules-3.13.0-19-generic N/A
 linux-firmware 1.126
RfKill:
 1: phy1: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: W55xEU
dmi.board.vendor: CLEVO CO.
dmi.board.version: D02
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/03/2013:svnCLEVOCO.:pnW55xEU:pvrNotApplicable:rvnCLEVOCO.:rnW55xEU:rvrD02:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: W55xEU
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO CO.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

[Shaawin Vsingam (shaawin95)]

Checked bugzilla, numerous bugs on the issue have already been reported, apparent work around was added to kernel 3.13 but issue still remains.

[Shaawin Vsingam (shaawin95)]

https://bugzilla.kernel.org/show_bug.cgi?id=43184 which is marked duplicate of https://bugzilla.kernel.org/show_bug.cgi?id=56581

[Shaawin Vsingam (shaawin95)]

Correction: workaround added to kernel 3.14, which I have not tested.