System takes too long to activate wifi on resume
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
network-manager (Ubuntu) |
Confirmed
|
Low
|
Unassigned |
Bug Description
Binary package hint: network-manager
Using Maverick on a Dell Mini 10v, Ubuntu takes much, much longer to activate wifi when resuming from sleep.
With Lucid, after opening the lid, NM would start searching for wifi after a few seconds -- perhaps 2-3. It would quickly reconnect and the laptop would be usable.
With Maverick, the system wakes up slightly slower (but not enough to matter). However, the wifi takes dramatically longer to reactivate -- about 30 seconds.
During this time, the red network disabled icon is displayed. Once the icon switches to the pulsing wifi-connecting logo, the connection is re-enabled quickly.
It's acting like NM didn't notice the system just woke up for 30 seconds, basically.
This is very annoying on a laptop -- wifi connection performance is important, and worked well in Lucid.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: network-manager 0.8.1+git.
ProcVersionSign
Uname: Linux 2.6.35-22-generic i686
NonfreeKernelMo
Architecture: i386
CRDA: Error: [Errno 2] No such file or directory
Date: Sun Oct 24 09:07:36 2010
IfupdownConfig:
auto lo
iface lo inet loopback
IpRoute:
192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.103 metric 2
169.254.0.0/16 dev eth1 scope link metric 1000
default via 192.168.1.1 dev eth1 proto static
Keyfiles: Error: [Errno 2] No such file or directory
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: network-manager
I was able to work around this by putting a script to run:
sleep 1
iwlist scan
... after the system comes out of resume (in /etc/pm/sleep.d)
Perhaps this is actually a bug in the wireless driver where it's not re-probing after a power event?