Wlan0 has vanished. Help.

[theend66]

Jeremy31, i just wanted to inform you that my wifi now connects and obtains an ip address. I am able to surf the net smoothly for 10mins and then the internet access stops though WICD shows the wifi connected. Any idea why?

[jeremy31]

What does

iwconfig

report when the internet fails. You could also check

cat /var/log/kern.log | tail -20

To see if there isn't something else causing the issue

[theend66]

$ iwconfig
lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"Aries"  
          Mode:Managed  Frequency:2.417 GHz  Access Point: 16:0C:C3:F1:2F:68   
          Bit Rate=1 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-35 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:36   Missed beacon:0

eth0      no wireless extensions.

~$ cat /var/log/kern.log | tail -20
Jan 20 00:46:13 the kernel: [ 1280.923662] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:13 the kernel: [ 1280.923684] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:14 the kernel: [ 1281.963615] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:14 the kernel: [ 1281.963644] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:15 the kernel: [ 1282.963435] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:15 the kernel: [ 1282.963449] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:16 the kernel: [ 1283.963340] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:16 the kernel: [ 1283.963350] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:30 the kernel: [ 1297.952257] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:30 the kernel: [ 1297.952278] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:31 the kernel: [ 1298.952198] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:31 the kernel: [ 1298.952226] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:32 the kernel: [ 1299.952108] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:32 the kernel: [ 1299.952121] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:46 the kernel: [ 1313.440930] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:46 the kernel: [ 1313.440939] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:47 the kernel: [ 1314.440826] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:47 the kernel: [ 1314.440831] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..
Jan 20 00:46:48 the kernel: [ 1315.440736] IPv4: martian source 192.168.1.83 from 192.168.1.254, on dev eth0
Jan 20 00:46:48 the kernel: [ 1315.440744] ll header: 00000000: ff ff ff ff ff ff 00 0c c3 f1 2f 68 08 06        ........../h..

And i am seated beside my modem. What could be happening?

[jeremy31]

You might want to move farther away from the wifi router in case it is overloading the wifi card

See if the problem is still there after

sudo iwconfig wlan0 power off

You may want to check iwconfig results after a reboot to see if power management is back on

[theend66]

Done the above command but things remain the same. I have tried it at various distance. This is making life so hard for me to get to work

[jeremy31]

Are you actually using ethernet at the same time as those errors are from the ethernet device

[theend66]

Sorry about that, my bad.

cat /var/log/kern.log | tail -20
Jan 21 11:45:32 themessiah kernel: [  188.315920] ath: EEPROM regdomain: 0x82be
Jan 21 11:45:32 themessiah kernel: [  188.315922] ath: EEPROM indicates we should expect a country code
Jan 21 11:45:32 themessiah kernel: [  188.315923] ath: doing EEPROM country->regdmn map search
Jan 21 11:45:32 themessiah kernel: [  188.315924] ath: country maps to regdmn code: 0x5b
Jan 21 11:45:32 themessiah kernel: [  188.315925] ath: Country alpha2 being used: SG
Jan 21 11:45:32 themessiah kernel: [  188.315925] ath: Regpair used: 0x5b
Jan 21 11:45:32 themessiah kernel: [  188.315926] ath: regdomain 0x82be dynamically updated by country IE
Jan 21 11:45:32 themessiah kernel: [  188.315934] cfg80211: Regulatory domain changed to country: SG
Jan 21 11:45:32 themessiah kernel: [  188.315935] cfg80211:  DFS Master region: unset
Jan 21 11:45:32 themessiah kernel: [  188.315936] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Jan 21 11:45:32 themessiah kernel: [  188.315937] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jan 21 11:45:32 themessiah kernel: [  188.315939] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jan 21 11:45:32 themessiah kernel: [  188.315940] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
Jan 21 11:45:32 themessiah kernel: [  188.315941] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jan 21 11:46:01 themessiah kernel: [  217.928808] Valid eCryptfs headers not found in file header region or xattr region, inode 57280010
Jan 21 11:46:01 themessiah kernel: [  217.928902] Valid eCryptfs headers not found in file header region or xattr region, inode 57280011
Jan 21 11:46:07 themessiah kernel: [  223.425065] Valid eCryptfs headers not found in file header region or xattr region, inode 57280010
Jan 21 11:46:07 themessiah kernel: [  223.425113] Valid eCryptfs headers not found in file header region or xattr region, inode 57280011
Jan 21 11:47:21 themessiah kernel: [  297.883550] Valid eCryptfs headers not found in file header region or xattr region, inode 57152892
Jan 21 11:47:23 themessiah kernel: [  299.736100] mce: [Hardware Error]: Machine check events logged