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Message #95973
[Bug 1289961] Re: 8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi 7260 slowness
Please note that I had to do the same uAPSD disabling in Windows 8/8.1 with latest drivers via the W8's driver parameters window.
Reference (e.g.) :
https://communities.intel.com/message/265839#265839
from
https://communities.intel.com/thread/47983
** Description changed:
With power management on, 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.
03:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 83)
- Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:c270]
+ Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:c270]
This is a regression in Trusty update going from linux-firmware 1.127 to 1.127.10. As per https://launchpad.net/ubuntu/+archive/primary/+files/linux-firmware_1.127.tar.gz this is how 1.127 only included:
/linux-firmware/iwlwifi-7260-7.ucode
/linux-firmware/iwlwifi-7260-8.ucode
However, as per https://launchpad.net/ubuntu/+archive/primary/+files/linux-firmware_1.127.10.tar.gz it includes:
/linux-firmware/iwlwifi-7260-8.ucode
/linux-firmware/iwlwifi-7260-9.ucode
WORKAROUND: Remove wireless interface's power management via Powertop
or
WORKAROUND: Revert to previous iwlwifi-7260-8.ucode (remove the -9 version from /lib/firmware)
- WORKAROUND: Use latest Intel upstream firmware iwlwifi-7260-ucode-23.10.10.0.
+ WORKAROUND: Use latest Intel upstream firmware iwlwifi-7260-ucode-23.10.10.0 with 3.17+ kernels
+ WORKAROUND : use the default (25.222.9.0) firmware and disable uAPSD (see message #64)
---
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
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-firmware in Ubuntu.
https://bugs.launchpad.net/bugs/1289961
Title:
8086:08b2 [Lenovo ThinkPad T440s] Power management causes Intel wifi
7260 slowness
Status in linux-firmware package in Ubuntu:
Triaged
Bug description:
With power management on, 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.
03:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 83)
Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:c270]
This is a regression in Trusty update going from linux-firmware 1.127 to 1.127.10. As per https://launchpad.net/ubuntu/+archive/primary/+files/linux-firmware_1.127.tar.gz this is how 1.127 only included:
/linux-firmware/iwlwifi-7260-7.ucode
/linux-firmware/iwlwifi-7260-8.ucode
However, as per https://launchpad.net/ubuntu/+archive/primary/+files/linux-firmware_1.127.10.tar.gz it includes:
/linux-firmware/iwlwifi-7260-8.ucode
/linux-firmware/iwlwifi-7260-9.ucode
WORKAROUND: Remove wireless interface's power management via Powertop
or
WORKAROUND: Revert to previous iwlwifi-7260-8.ucode (remove the -9 version from /lib/firmware)
WORKAROUND: Use latest Intel upstream firmware iwlwifi-7260-ucode-23.10.10.0 with 3.17+ kernels
WORKAROUND : use the default (25.222.9.0) firmware and disable uAPSD (see message #64)
---
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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