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Message #56471
[Bug 1289961] Re: Power management causes Intel wifi 7260 slowness
Francois Thirioux, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc2-trusty/ and
advise to the results?
** Tags removed: needs-apport-collect
** Tags added: latest-bios-2.25
** Description changed:
- I get a new ThinkPad T440s with Intel 7260 ac wireless.
+ In Ubuntu Trusty (Gnome) with my ThinkPad T440s using Intel 7260 ac
+ wireless the download speed reaches an upper limit 400 kB/s instead of
+ the normal 1500 kB/s I get with some other PC connected to my network.
+ The speed often slows down very very low, especially when I'm far away
+ from my AP. Removing N mode does not solve the issue.
- The dowload speed reachs an upper limit 400 kB/s instead of the normal
- 1500 kB/s I get with some other PC connected to my network. The speed
- often slows down very very low, especially when I'm far away from my AP.
+ WORKAROUND: Remove wireless interface's power management via Powertop
- I use Ubuntu Trusty (Gnome) up-to-date.
-
- Removing N mode does not solve the issue. So I tried removing the
- wireless interface's power management in Powertop and it did solve the
- slowness issue. (iwconfig shows "Power management : off" in this case,
- obviously.)
-
-
- lspci************************
-
- 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
-
- lshw*************************
-
- *-network
- description: Interface réseau sans fil
- produit: Wireless 7260
- fabriquant: Intel Corporation
- identifiant matériel: 0
- information bus: pci@0000:03:00.0
- nom logique: wlan0
- version: 83
- numéro de série: xxxxxxxxxxx
- bits: 64 bits
- horloge: 33MHz
- fonctionnalités: bus_master cap_list ethernet physical wireless
- configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-16-generic firmware=22.24.8.0 ip=192.168.1.21 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
- ressources: irq:61 mémoire:f0400000-f0401fff
-
- iwconfig*******************************
-
- wlan0 IEEE 802.11abgn ESSID:"Livebox"
- Mode:Managed Frequency:2.437 GHz Access Point: xxx
- Bit Rate=130 Mb/s Tx-Power=16 dBm
- Retry long limit:7 RTS thr:off Fragment thr:off
- Power Management:on
- Link Quality=60/70 Signal level=-50 dBm
- Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
- Tx excessive retries:2549 Invalid misc:273 Missed beacon:0
-
- ifconfig******************************
-
- wlan0 Link encap:Ethernet HWaddr xxx
- inet adr:192.168.1.21 Bcast:192.168.1.255 Masque:255.255.255.0
- adr inet6:xxx/64 Scope:Lien
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- Packets reçus:30450 erreurs:0 :0 overruns:0 frame:0
- TX packets:18296 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 lg file transmission:1000
- Octets reçus:41761779 (41.7 MB) Octets transmis:1992389 (1.9 MB)
- ---
+ ---
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC1: ft 1884 F.... pulseaudio
- /dev/snd/controlC0: ft 1884 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC1: ft 1884 F.... pulseaudio
+ /dev/snd/controlC0: ft 1884 F.... pulseaudio
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=54b265b9-4433-42d4-8d0f-fac028ee7030
InstallationDate: Installed on 2014-03-05 (46 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
Lsusb:
- Bus 001 Device 002: ID 8087:8000 Intel Corp.
- Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
- Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 001 Device 002: ID 8087:8000 Intel Corp.
+ Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+ Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20AQCTO1WW
Package: linux (not installed)
ProcEnviron:
- TERM=xterm
- PATH=(custom, no user)
- LANG=fr_FR.UTF-8
- SHELL=/bin/bash
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=fr_FR.UTF-8
+ SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=b1cbc034-b66f-4f6c-9d61-507b8cb23ffe ro quiet
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
PulseList:
- Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
- No PulseAudio daemon running, or not running as session daemon.
+ Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
+ No PulseAudio daemon running, or not running as session daemon.
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
+ linux-restricted-modules-3.13.0-24-generic N/A
+ linux-backports-modules-3.13.0-24-generic N/A
+ linux-firmware 1.127
RfKill:
- 0: phy0: Wireless LAN
- Soft blocked: no
- Hard blocked: no
+ 0: phy0: Wireless LAN
+ Soft blocked: no
+ Hard blocked: no
Tags: trusty
Uname: Linux 3.13.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
-
+
_MarkForUpload: True
dmi.bios.date: 03/28/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET75WW (2.25 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: 0B98405 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET75WW(2.25):bd03/28/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQCTO1WW
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
** Summary changed:
- Power management causes Intel wifi 7260 slowness
+ 8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi 7260 slowness
** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.14-rc6 needs-upstream-testing
** Changed in: linux (Ubuntu)
Importance: Medium => Low
--
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https://bugs.launchpad.net/bugs/1289961
Title:
8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi
7260 slowness
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
In Ubuntu Trusty (Gnome) with my ThinkPad T440s using Intel 7260 ac
wireless the download speed reaches an upper limit 400 kB/s instead of
the normal 1500 kB/s I get with some other PC connected to my network.
The speed often slows down very very low, especially when I'm far away
from my AP. Removing N mode does not solve the issue.
WORKAROUND: Remove wireless interface's power management via Powertop
---
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ft 1884 F.... pulseaudio
/dev/snd/controlC0: ft 1884 F.... pulseaudio
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=54b265b9-4433-42d4-8d0f-fac028ee7030
InstallationDate: Installed on 2014-03-05 (46 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
Lsusb:
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20AQCTO1WW
Package: linux (not installed)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=fr_FR.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=b1cbc034-b66f-4f6c-9d61-507b8cb23ffe ro quiet
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
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
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: trusty
Uname: Linux 3.13.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 03/28/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET75WW (2.25 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: 0B98405 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET75WW(2.25):bd03/28/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQCTO1WW
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
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