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Message #91546
[Bug 1392038] Re: 8086:08b2 [Lenovo ThinkPad Edge E440] Slow WiFi with Intel 7260 iwlwifi
robalrr, the next step is to fully reverse commit bisect from kernel
3.18-rc4 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 removed: kernel-bug-exists-upstream
** Tags added: kernel-fixed-upstream kernel-fixed-upstream-3.18-rc5
** Tags added: needs-reverse-bisect
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https://bugs.launchpad.net/bugs/1392038
Title:
8086:08b2 [Lenovo ThinkPad Edge E440] Slow WiFi with Intel 7260
iwlwifi
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
With Utopic and Trusty, when the wireless network is always connected
to the router, it is very slow and sometimes it does not work.
Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 73)
Subsystem: Intel Corporation Wireless-N 7260 [8086:4262]
sudo lshw -C network
*-network
description: Wireless interface
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
version: 73
serial: ac:7b:a1:a0:51:86
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.16.0-24-generic firmware=25.222.9.0 ip=192.168.31.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:46 memory:f0c00000-f0c01fff
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-24-generic 3.16.0-24.32
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: robalrr 2699 F.... pulseaudio
/dev/snd/pcmC1D0p: robalrr 2699 F...m pulseaudio
/dev/snd/controlC1: robalrr 2699 F.... pulseaudio
/dev/snd/controlC0: robalrr 2699 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Nov 12 20:38:17 2014
HibernationDevice: RESUME=UUID=309fa850-dd60-4067-bb77-8b7dc8860739
InstallationDate: Installed on 2014-08-19 (85 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: LENOVO 20C50050US
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=f0d8ed1a-d52d-406a-b243-8a360d7d4761 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.16.0-24-generic N/A
linux-backports-modules-3.16.0-24-generic N/A
linux-firmware 1.138
SourcePackage: linux
UpgradeStatus: Upgraded to utopic on 2014-09-30 (43 days ago)
dmi.bios.date: 03/21/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: J9ET61WW (1.61 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20C50050US
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrJ9ET61WW(1.61):bd03/21/2014:svnLENOVO:pn20C50050US:pvrThinkPadEdgeE440:rvnLENOVO:rn20C50050US:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20C50050US
dmi.product.version: ThinkPad Edge E440
dmi.sys.vendor: LENOVO
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References