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 Inte
apport information
** Tags added: apport-collected
** Description changed:
I get a new ThinkPad T440s with Intel 7260 ac wireless.
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 d
Apport collect to follow.
I did 8 measures of wifi speed (quite far from my router 2.4 GHz WPA2 AES) with
and without PM. I removed the best and the worst :
mean PM on : 418 ko/s
mean PM off : 562 ko/s
Sure it is much better than before (when I opened this bug) but not as
much as it should. Addi
** Tags removed: iwlwifi
** Tags added: needs-apport-collect
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Title:
Power management causes Intel wifi 7260 slowness
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Francois Thirioux, could you please execute the following at a terminal:
apport-collect 1289961
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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This seems to be fixed now. I am running with n mode and power saving
with no problems as of latest 14.04, more specifically:
jschopp@p55t:~$ uname -a
Linux p55t 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64
x86_64 x86_64 GNU/Linux
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Confirmed, it also fixes connecting the iPhone/iPad hotspot. Having
dealt with MAcs in WLAN enterprise networks before, I know when they
start flapping in and out of powersave, things break, so this makese
sense if the laptop was triggering that conditition through its
powersave issue
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I also have this on the latest Trusty nightly. Turning off PM fixes it.
I have a 50/10Mbit connection here, and I start at 20Mbit and quickly
fall all the way to ~2Mbit. This is over multiple sequential download
(e.g apt-get upgrade). This is even worse if you are connected over a
mobile hotspot
Managed to get the wifi stable by disabling n and power savings.
sudo vi /etc/modprobe.d/iwlwifi-disable11n.conf
Add this line: options iwlwifi 11n_disable=1
powertop to set Wireless Power Saving for interface wlan0 off
uname -a
Linux p55t 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33 UTC 2
Also worth noting this related bug with the same wifi adapter:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1289961
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Title:
Power managem
I kept BGN mode for my router.
With latest :
3.13.0-20-generic #42-Ubuntu
I get max speed with PM off (somewhat far from my router) and half of it when
PM is on. So it is much better but the title of this bug remains open.
The iwlwifi/mac changes in 3.13.7 seem to partially work ?
I noticed that
same same on lenovo thinkpad yoga. Less (maybe no) problems when turning
wifi-router to g-only mode (no n-mode).
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Title:
Power management causes
kubuntu trusty, linux 3.13.0-19-generic
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Title:
Power management causes Intel wifi 7260 slowness
To manage notifications about this bug go to:
h
Still occurs running new 3.13.7 ubuntu kernel (containing some
iwlwifi/mac stuff).
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Title:
Power management causes Intel wifi 7260 slowness
To m
I can confirm this bug. I've got a Lenovo Yoga 2 Pro.
Ubuntu 12.04.4
3.11.0-15-generic
iwlwifi
firmware 22.0.7.0
power management enabled: 90 Mbps (that is my max possible internet speed,
haven't tried any local file transfers tough maybe it is even faster)
power management disabled: 90 Mbps
-->
I did not test another release on this laptop, only Trusty with 3.13 and
3.14rc6 kernels. A lot of people in forums complain about 7260 wifi card
(disconnections, slowness, choppy connection, bad range...), not only
using Linux. Maybe is it just firmware-related ?
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Did this issue also happen in prior releases, or is this new in Trusty?
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Title:
Power management causes Intel wifi 7260 slowness
To manage notif
I add that the connection runs at max speed at the beginning of data
transfer. After some dozens of seconds of data transfer the speed slows
down (e.g. where I am connected at the moment, with PM=on, it went from
1200 ko/s to 360 ko/s when running internet speed tests).
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** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Power management causes Intel wifi 7260 slowness
To manage notifica
Ok.
The latest 3.14 kernel speeds up my wifi connection but does not reach
the best value :
downloading far away from my router a file on a local-network hard drive :
- 3.13 with wifi power management : 60 ko/s
- 3.13 without PM : 360 ko/s
- 3.14 without PM : 500 ko/s
- saucy kernel on X220 (6230
** Tags added: kernel-bug-exists-upstream
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Title:
Power management causes Intel wifi 7260 slowness
To manage notifications about this bug go to:
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.14 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix t
** Package changed: ubuntu => linux-firmware (Ubuntu)
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Title:
Power management causes Intel wifi 7260 slowness
To manage notifications about thi
Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general. It is important that bug reports be filed about source
packages so that people
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