When I have the OP's original issue, lost connection after resume and
only one network listed, simply running "sudo iw wlp3s0 scan" makes
everything work again, without having to reload the module.
I am sure I have seen the lost connection after resume without any
network listed too. I have not
There are possibly two independent issues here. In some cases the
connection is lost after resume, and the module must be reloaded (or
configured to be unloaded at suspend).
The other issue is that nm-applet shows no connection (or in my case it
shows a wired connection and no wifi bar or
Tormod Volden, to track your hardware, it will help immensely if you filed a
new report with Ubuntu, using the default repository kernel (not
mainline/upstream/3rd party) via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
Seeing the same as OP with "Intel Corporation Centrino Advanced-N 6235
(rev 24)" on 16.04.2 with 4.8.0-34-generic.
** Changed in: linux (Ubuntu)
Status: Expired => Confirmed
** Bug watch added: Red Hat Bugzilla #737424
https://bugzilla.redhat.com/show_bug.cgi?id=737424
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Other possible workarounds to try out:
https://bugzilla.redhat.com/show_bug.cgi?id=737424
https://ubuntuforums.org/showthread.php?t=2004690=4
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[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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anarsoul, it will help immensely if you filed a new report with the Ubuntu
repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.
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Something's wrong with scan after resume. Not sure if it's NM or kernel
bug, but doing 'sudo iw wlan0 scan' fixes the issue till next
suspend/resume.
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openfred, it will help immensely if you filed a new report with the Ubuntu
repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.
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Believe me, disabling wifi 11n solves the issue, as explained in Post #9
However, the data transfert speed is now really slow with this option.
By disabling wifi 11n (between 72Mb/s and 152Mb/s), I was expecting wifi G
speed (54Mb/s) but only get Wifi B (11Mb/s speed)...
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Juraj, it will help immensely if you filed a new report with the Ubuntu
repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.
** Changed in: linux
Here's my dmidecode for a Thinkpad W520:
8BET62WW (1.42 )
07/26/2013
It has the newest available BIOS.
lspci:
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor
Peak] (rev 34)
Kernel:
Linux juraj 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64
[Solved] Validated on a Lenovo Thinkpad T520 using a 6205 wifi card
$ lspci | grep 6205
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor
Peak] (rev 34)
Just add a file for iwlwifi options in /etc/modprobe.d (1 line) -
filename can be anything:
$ cat
I can confirm same behavior as James Ferguson on a Thinkpad W520 with
Intel Wireless Centrino 6205 Advanced-N. Network manager fails to
display any signal strength and visible networks, but I am actually
connected and internet works. This didn't happen on Ubuntu 14.04.
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I have been watching the Network Manager applet after suspend and seeing
the problem a lot, but then I noticed that even though it's saying i
have no connectivity (or available networks), I am actually connected.
I have to assume this was always the case and I didn't notice!
So, I assume that
James Ferguson, as per http://support.lenovo.com/us/en/products/Laptops-
and-netbooks/ThinkPad-X-Series-
laptops/ThinkPad-X230?linkTrack=GPS%253ABody_Search%2BProducts==false
an update to your computer's buggy, insecure, and outdated BIOS is
available (2.66). When you update to this following
** Tags added: bios-outdated-2.66 kernel-bug-exists-upstream-4.7-rc3
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Title:
Wifi non-functional after suspend (Intel 6205)
To manage
** Description changed:
Often, but not always, on resume from suspend my wifi does not connect.
- Usually in the networking tray drop-down I can see one wifi network
- listed (out of dozens).
+ In the networking tray drop-down I can see one single wifi network
+ listed out of the many within
Confirmed upstream - took about 4 suspend-resumes to reproduce with the
4.7.0 kernel
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Title:
Wifi non-functional after suspend (Intel 6205)
To
Intalled. Will report back with results
$ uname -r
4.7.0-040700rc3-generic
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.7-rc1 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
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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Title:
Wifi non-functional after suspend (Intel 6205)
To manage notifications
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