Re: NetworkManager taking ages to automatically connect to wifi

[Sparhawk <networkmanager-list plast id au>]

On 22/05/13 01:47, Dan Williams wrote:
> On Tue, 2013-05-21 at 16:18 +1000, Sparhawk wrote:
> > Hi,
> >
> > Somewhere around the upgrade from Kubuntu 12.10 to 13.04, NetworkManager
> > has started taking ages to connect automatically to my preferred wifi
> > network.
> >
> > In the past, after waking from suspend, I would connect within a few
> > seconds. Now it takes minutes. The exact time is erratic. Mostly it is
> > around the two minute mark, but very rarely it takes ~10 seconds.
> Can you grab some logs from wherever your distro puts syslog 'daemon'
> output?  That's
> probably /var/log/daemon.log, /var/log/NetworkManager.log,
> or /var/log/syslog.
In Ubuntu, it's just in the system/kernel log (/var/log/kern.log)
http://pastebin.com/HyeP2die

I've actually asked on the kde forum [1], but I suspect there is nothing
useful there. FWIW they mentioned putting NetworkManager in debug mode,
but I couldn't work out how to kill it without it automatically
restarting. (They also suggested I ask on this mailing list.)

[1]
http://forum.kde.org/viewtopic.php?f=225&t=110886&sid=391e2fbb71aa32f4d4ef6befb1ad8e0b#p264521

> If it's taking ages to find the network, I suspect that the network
> simply isn't found in a wifi scan.  What wifi hardware do you have and
> what driver are you using?  If you can provide the output of "lspci" and
> "lsusb" that would point us in the right direction.

I can see my network in the KDE network plasmoid minutes before it
automatically connect, so I suspect it's not purely the fact that the
network cannot be found. One other thing I noticed is the network name
appears at slightly variable times in the plasmoid. Sometimes it's
within two seconds. Sometimes it can take more like 15–20 seconds. In
addition, occasionally (perhaps 20% of the time) the network
automatically connects as expected within a few seconds.

I wonder if the problem is that the time it takes to find the network is
variable. If it find is at (say) < 3 seconds, then it can connect
automatically immediately. If it takes longer than this, the polling
time to re-attempt the connection is slow enough that it will take more
like 2 minutes.

FWIW I have a different computer running Xubuntu 13.04 and it connect
perfectly to the network everytime.

$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor
Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core
Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series
Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset
Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 2 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 4 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 5 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 6 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM67 Express Chipset Family LPC
Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset
Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family
SMBus Controller (rev 05)
01:00.0 VGA compatible controller: NVIDIA Corporation GF116M [GeForce GT
555M/635M] (rev ff)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6230
[Rainbow Peak] (rev 34)
04:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host
Controller (rev 04)
0a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06)
$ lsusb
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 005: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub /
D-Link DUB-H4 USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0408:2fb1 Quanta Computer, Inc.
Bus 002 Device 003: ID 8086:0189 Intel Corp.
Bus 003 Device 008: ID 0e6a:030c Megawin Technology Co., Ltd
Bus 003 Device 009: ID 15d9:0a4d Trust International B.V. Optical Mouse

Thank you!

> Thanks!
> Dan
>
> > However, if I click on the (KDE) network plasmoid and manually select my
> > wifi network, I connect within a couple of seconds. It looks like a
> > regression to me, but I'm happy to provide more information if necessary.
> >
> > Cheers.
> > _______________________________________________
> > networkmanager-list mailing list
> > networkmanager-list gnome org
> > https://mail.gnome.org/mailman/listinfo/networkmanager-list