system is hanging when network get disconnected on my laptop

[manopj1]

I use ubuntu 11.04 client with autofs configured nfs mount.I have conneted this client to ldap server and getting sucessfull authenication.I configured offline configuration also as my lap top network conntion through wifi.Now I am facing two issues.

My client gui hangs when wifi network disconnected.

I have upgraded the kernel to 3.1.0-030100rc10-generic but still the problem exits.

[praseodym]

You know that 11.04 is outdated? I recommend a fresh installation of 12.04. Please check the outputs of

lspci -nnk | grep -iA2 net
lsusb
lsmod
iwconfig
rfkill list
sudo iwlist scan

[manopj1]

here it shows the output

oot@p61:~# lspci -nnk|grep -iA2 net
01:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1201]
Kernel driver in use: iwlagn
--
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 02)
Subsystem: QUANTA Computer Inc Device [152d:0772]
Kernel driver in use: r8169
root@p61:~# lsusb
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@p61:~# lsmod
Module Size Used by
binfmt_misc 17292 1
parport_pc 32114 0
ppdev 12849 0
nfs 302874 1
lockd 78804 1 nfs
fscache 50674 1 nfs
auth_rpcgss 39629 1 nfs
nfs_acl 12771 1 nfs
sunrpc 205179 13 nfs,lockd,auth_rpcgss,nfs_acl
dm_crypt 22559 0
autofs4 27924 2
arc4 12473 2
iwlagn 278442 0
snd_hda_codec_realtek 240069 1
mac80211 411961 1 iwlagn
snd_hda_intel 24262 2
snd_hda_codec 93296 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13276 1 snd_hda_codec
snd_pcm 80468 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 13132 0
snd_rawmidi 25187 1 snd_seq_midi
snd_seq_midi_event 14475 1 snd_seq_midi
snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event
joydev 17393 0
snd_timer 28932 2 snd_pcm,snd_seq
snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq
snd 55902 13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,sn d_seq_device
soundcore 12600 1 snd
cfg80211 172813 2 iwlagn,mac80211
snd_page_alloc 14108 2 snd_hda_intel,snd_pcm
psmouse 69362 0
lp 17455 0
serio_raw 12990 0
parport 40930 3 parport_pc,ppdev,lp
dm_mirror 21822 0
dm_region_hash 16065 1 dm_mirror
dm_log 18193 2 dm_mirror,dm_region_hash
btrfs 606516 0
zlib_deflate 26622 1 btrfs
libcrc32c 12543 1 btrfs
i915 519054 3
drm_kms_helper 32889 1 i915
drm 196543 4 i915,drm_kms_helper
r8169 47492 0
i2c_algo_bit 13199 1 i915
video 18908 1 i915
root@p61:~# rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
root@p61:~# sudo iwlist scan
lo Interface doesn't support scanning.

eth6 Interface doesn't support scanning.

wlan6 Scan completed :
Cell 01 - Address: 1C:AF:F7:81:AD:58
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=36/70 Signal level=-74 dBm
Encryption keyff
ESSID:"CSE-2"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000000ce6c97
Extra: Last beacon: 16ms ago
IE: Unknown: 00054353452D32
IE: Unknown: 010882848B960C121824
IE: Unknown: 030101
IE: Unknown: 0706474220010D0B
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101850003A4000027A4000042435E0062322F 00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010000004000
Cell 02 - Address: 1C:AF:F7:81:AD:59
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=34/70 Signal level=-76 dBm
Encryption keyn
ESSID:"CSEstaff"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000000cfcd80
Extra: Last beacon: 5216ms ago
IE: Unknown: 00084353457374616666
IE: Unknown: 010882848B960C121824
IE: Unknown: 030101
IE: Unknown: 0706474220010D0B
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101850003A4000027A4000042435E0062322F 00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010000004000
Cell 03 - Address: 1C:AF:F7:81:AD:88
Channel:7
Frequency:2.442 GHz (Channel 7)
Quality=42/70 Signal level=-68 dBm
Encryption keyff
ESSID:"CSE-1"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000002714b393b9
Extra: Last beacon: 4800ms ago
IE: Unknown: 00054353452D31
IE: Unknown: 010882848B960C121824
IE: Unknown: 030107
IE: Unknown: 0706474220010D0B
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: DD180050F2020101820003A4000027A4000042435E0062322F 00
IE: Unknown: DD1E00904C334C101BFFFF0000000000000000000000000000 00000000000000
IE: Unknown: 2D1A4C101BFFFF000000000000000000000000000000000000 000000
IE: Unknown: DD1A00904C3407080800000000000000000000000000000000 000000
IE: Unknown: 3D1607080800000000000000000000000000000000000000
IE: Unknown: 4A0E14000A002C01C800140005001900
IE: Unknown: 7F0101
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010000004000
Cell 04 - Address: 58:93:96:08:3F:79
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=69/70 Signal level=-41 dBm
Encryption keyn
ESSID:""
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000001d5d7b454
Extra: Last beacon: 4608ms ago
IE: Unknown: 0000
IE: Unknown: 010482848B96
IE: Unknown: 03010B
IE: Unknown: 050400010000
IE: Unknown: 2A0100
IE: Unknown: 32080C1218243048606C
IE: Unknown: DD180050F2020101870003A4000027A4000042435E0062322F 00
IE: Unknown: DD1E00904C334C101BFFFF0000000000000000000010000000 00000000000000
IE: Unknown: 2D1A4C101BFFFF000000000000000000001000000000000000 000000
IE: Unknown: DD1A00904C340B080000000000000000000000000000000000 000000
IE: Unknown: 3D160B080000000000000000000000000000000000000000
IE: Unknown: DD080013920100018500
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 05 - Address: 58:93:96:C8:3F:79
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=70/70 Signal level=-40 dBm
Encryption keyn
ESSID:"AJCE CENTRAL WiFi"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000001d5d7bd58
Extra: Last beacon: 4608ms ago
IE: Unknown: 0011414A43452043454E5452414C2057694669
IE: Unknown: 010482848B96
IE: Unknown: 03010B
IE: Unknown: 2A0100
IE: Unknown: 32080C1218243048606C
IE: Unknown: DD180050F20201018F0003A4000027A4000042435E0062322F 00
IE: Unknown: DD1E00904C334C101BFFFF0000000000000000000010000000 00000000000000
IE: Unknown: 2D1A4C101BFFFF000000000000000000001000000000000000 000000
IE: Unknown: DD1A00904C340B080000000000000000000000000000000000 000000
IE: Unknown: 3D160B080000000000000000000000000000000000000000
IE: Unknown: DD080013920100018500
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 06 - Address: 58:93:96:88:3F:79
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=70/70 Signal level=-38 dBm
Encryption keyff
ESSID:"AJCE-Mobile"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000001d5d7b8f0
Extra: Last beacon: 4608ms ago
IE: Unknown: 000B414A43452D4D6F62696C65
IE: Unknown: 010482848B96
IE: Unknown: 03010B
IE: Unknown: 050400010000
IE: Unknown: 2A0100
IE: Unknown: 32080C1218243048606C
IE: Unknown: DD180050F2020101870003A4000027A4000042435E0062322F 00
IE: Unknown: DD1E00904C334C101BFFFF0000000000000000000010000000 00000000000000
IE: Unknown: 2D1A4C101BFFFF000000000000000000001000000000000000 000000
IE: Unknown: DD1A00904C340B080000000000000000000000000000000000 000000
IE: Unknown: 3D160B080000000000000000000000000000000000000000
IE: Unknown: DD080013920100018500

root@p61:~#

[praseodym]

There is a bug with the N-mode of the driver. Deactivate it via:

echo "options iwlagn 11n_disable=1" | sudo tee /etc/modprobe.d/iwlagn.conf
sudo modprobe -rfv iwlagn
sudo modprobe -v iwlagn

[manopj1]

thanks for your reply.but still my problem exits.I think it is the issue with ldap authetication or nfs in gui mode.I use pam

terminal its working fine.only thing in gui i am not able to logout and restart.