[pkg-wpa-devel] Bug#498600: After resume, wpasupplicant sits idle

[Antony Gelberg]

Package: wpasupplicant
Version: 0.6.4~git20080716.93ef879-1
Severity: normal

Hi,

I have to say that this is a difficult problem to replicate, or should I say
the workaround is not always the same.  I find that after suspending or
hibernating my laptop, the wlan0 interface doesn't come back up properly.  It
doesn't seem to matter whether or not I resume in the same SSID that I
suspended in.

Here follows some output, taken a couple of minutes after resume, with my
comments prefixed with ***.

Every 2.0s: ifconfig wlan0
Sat Sep  6 11:57:11 2008

wlan0     Link encap:Ethernet  HWaddr 00:1f:3c:4b:70:1f
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:675729 errors:0 dropped:0 overruns:0 frame:0
          TX packets:269129 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:880049567 (839.2 MiB)  TX bytes:65980602 (62.9 MiB)

*** No IP address assigned.

very 2.0s: iwconfig wlan0 
wlan0     IEEE 802.11  ESSID:"haslemere"
          Mode:Managed  Frequency:2.462 GHz  Access Point: Not-Associated
          Tx-Power=15 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Encryption key: ***munged [2]
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

*** No MAC address.

labrie:/home/antony# tail -f /var/log/wpa_supplicant.wlan0.log 
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.
Failed to initiate AP scan.

*** Self-explanatory.

Every 2.0s: ps ax |grep wlan0
Sat Sep  6 11:59:47 2008

28074 ?        Ss     0:00 /sbin/wpa_supplicant -W -B -P
/var/run/wpa_supplicant.wlan0.pid -i wlan0 -D wext -q -f
/var/log/wpa_supplicant.w
28125 ?        Ss     0:00 /sbin/wpa_cli -B -P /var/run/wpa_action.wlan0.pid
-i wlan0 -p /var/run/wpa_supplicant -a /sbin/wpa_action
32259 pts/8    S+     0:00 watch ifconfig wlan0
32267 ?        Ss     0:00 avahi-autoipd: [wlan0] bound 169.254.3.212
32268 ?        Ss     0:00 avahi-autoipd: [wlan0] callout dispatcher
32277 pts/10   S+     0:00 watch iwconfig wlan0
32280 ?        Ss     0:00 dhclient3 -pf /var/run/dhclient.wlan0.pid -lf
/var/lib/dhcp3/dhclient.wlan0.leases wlan0
32392 pts/9    S+     0:00 tail -f /var/log/wpa_supplicant.wlan0.log
32593 pts/14   S+     0:00 watch ps ax |grep wlan0
32629 pts/14   S+     0:00 sh -c ps ax |grep wlan0
32631 pts/14   S+     0:00 grep wlan0

*** wpa_supplicant and dhclient are running.

I tried reassociate in wpa_cli, and it associated with the AP, but still
didn't receive an IP address via DHCP.  I then tried ifdown wlan0 && ifup
wlan0, and I got:
<2>Trying to associate with 00:14:bf:3d:a7:8e (SSID='haslemere' freq=2462 MHz)
<2>CTRL-EVENT-SCAN-RESULTS 
<2>Authentication with 00:14:bf:3d:a7:8e timed out.

Eventually things work, after ifdown wlan0, then waiting a minute or two, then
ifup wlan0.  I wish I could be more specific about the recovery but it doesn't
seem consistent - I'm not even 100% sure it's related to my ifdown and ifup
commands.  Please let me know if you need any more information, I'll happily
assist debugging if you give me a clue.

Lastly:
# cat /etc/network/interfaces 
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp

auto wlan0
iface wlan0 inet manual
        wpa-driver wext
        wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp

Antony

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages wpasupplicant depends on:
ii  adduser                       3.110      add and remove users and groups
ii  libc6                         2.7-13     GNU C Library: Shared libraries
ii  libdbus-1-3                   1.2.1-3    simple interprocess messaging syst
ii  libpcsclite1                  1.4.102-1  Middleware to access a smart card 
ii  libreadline5                  5.2-3      GNU readline and history libraries
ii  libssl0.9.8                   0.9.8g-13  SSL shared libraries
ii  lsb-base                      3.2-20     Linux Standard Base 3.2 init scrip

wpasupplicant recommends no packages.

Versions of packages wpasupplicant suggests:
pn  libengine-pkcs11-openssl      <none>     (no description available)
pn  wpagui                        <none>     (no description available)

-- no debconf information