Hi, I have installed Linux Mint 13 on my lenovo 62Q laptop. laptop arun # uname -a Linux laptop 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:41:14 UTC 2012 i686 i686 i386 GNU/Linux I have Intel Corporation PRO/Wireless 3945ABG WiFi adapter in my laptop. laptop arun # lspci | grep Wireless 04:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) WiFi connectivity with the access point works fine if the distance between the laptop and the access point is 1 or 2 feets. But it does not work if the distance is more than that. I get following messages in the /var/log/syslog file when the problem occurs - Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) starting connection 'HOME' Jan 20 11:50:15 laptop NetworkManager[4793]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started... Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting... Jan 20 11:50:15 laptop NetworkManager[4793]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0] Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0/wireless): connection 'HOME' requires no security. No secrets needed. Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Config: added 'ssid' value 'HOME' Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Config: added 'scan_ssid' value '1' Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Config: added 'bssid' value '00:08:5c:ec:05:a4' Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Config: added 'key_mgmt' value 'NONE' Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete. Jan 20 11:50:15 laptop NetworkManager[4793]: <info> Config: set interface ap_scan to 1 Jan 20 11:50:15 laptop NetworkManager[4793]: <info> (wlan0): supplicant interface state: disconnected -> scanning Jan 20 11:50:18 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:18 laptop kernel: [ 3417.858666] wlan0: authenticate with 00:08:5c:ec:05:a4 (try 1) Jan 20 11:50:18 laptop NetworkManager[4793]: <info> (wlan0): supplicant interface state: scanning -> authenticating Jan 20 11:50:18 laptop kernel: [ 3418.056277] wlan0: authenticate with 00:08:5c:ec:05:a4 (try 2) Jan 20 11:50:18 laptop kernel: [ 3418.256275] wlan0: authenticate with 00:08:5c:ec:05:a4 (try 3) Jan 20 11:50:18 laptop kernel: [ 3418.456264] wlan0: authentication with 00:08:5c:ec:05:a4 timed out Jan 20 11:50:26 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:26 laptop kernel: [ 3425.820095] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:50:26 laptop kernel: [ 3426.020271] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:50:26 laptop kernel: [ 3426.220147] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:50:26 laptop kernel: [ 3426.420272] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:50:34 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:34 laptop kernel: [ 3433.783816] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:50:34 laptop kernel: [ 3433.980169] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:50:34 laptop kernel: [ 3434.180279] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:50:34 laptop kernel: [ 3434.380269] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:50:42 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:42 laptop kernel: [ 3441.738873] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:50:42 laptop kernel: [ 3441.936258] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:50:42 laptop kernel: [ 3442.136201] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:50:42 laptop kernel: [ 3442.336188] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:50:50 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:50 laptop kernel: [ 3449.702884] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:50:50 laptop kernel: [ 3449.900281] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:50:50 laptop kernel: [ 3450.100270] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:50:50 laptop kernel: [ 3450.300284] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:50:58 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:50:58 laptop kernel: [ 3457.664135] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:50:58 laptop kernel: [ 3457.864176] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:50:58 laptop kernel: [ 3458.064167] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:50:58 laptop kernel: [ 3458.264289] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:51:06 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:51:06 laptop kernel: [ 3465.626854] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:51:06 laptop kernel: [ 3465.824279] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:51:06 laptop kernel: [ 3466.024081] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:51:06 laptop kernel: [ 3466.224092] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:51:13 laptop wpa_supplicant[903]: Trying to authenticate with 00:08:5c:ec:05:a4 (SSID='HOME' freq=2462 MHz) Jan 20 11:51:13 laptop kernel: [ 3473.586889] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 1/3) Jan 20 11:51:14 laptop kernel: [ 3473.784180] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 2/3) Jan 20 11:51:14 laptop kernel: [ 3473.984267] wlan0: direct probe to 00:08:5c:ec:05:a4 (try 3/3) Jan 20 11:51:14 laptop kernel: [ 3474.184281] wlan0: direct probe to 00:08:5c:ec:05:a4 timed out Jan 20 11:51:16 laptop NetworkManager[4793]: <warn> Activation (wlan0/wireless): association took too long, failing activation. Jan 20 11:51:16 laptop NetworkManager[4793]: <info> (wlan0): device state change: config -> failed (reason 'supplicant-timeout') [50 120 11] Jan 20 11:51:16 laptop NetworkManager[4793]: <warn> Activation (wlan0) failed for access point (HOME) Jan 20 11:51:16 laptop NetworkManager[4793]: <warn> Activation (wlan0) failed. Jan 20 11:51:16 laptop NetworkManager[4793]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0] Jan 20 11:51:16 laptop NetworkManager[4793]: <info> (wlan0): deactivating device (reason 'none') [0] Jan 20 11:51:16 laptop NetworkManager[4793]: <info> (wlan0): supplicant interface state: authenticating -> disconnected Jan 20 11:51:16 laptop NetworkManager[4793]: <warn> Couldn't disconnect supplicant interface: This interface is not connected. Please note that other devices (like my android mobile) do not have this problem and these devices associate with the same access point without any problem from larger distance (10-20 meters). When the problem occurs the laptop detects wireless network but does not associate with the access point. Scanning the network gives following output - laptop arun # iwconfig wlan0 wlan0 IEEE 802.11abg ESSID:off/any Mode:Managed Frequency:2.462 GHz Access Point: Not-Associated Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off laptop arun # iwlist wlan0 scan wlan0 Scan completed : Cell 01 - Address: 00:08:5C:EC:05:A4 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=49/70 Signal level=-61 dBm Encryption key:off ESSID:"HOME" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Master Extra:tsf=00000001d85d0186 Extra: Last beacon: 1700ms ago IE: Unknown: 0004484F4D45 IE: Unknown: 010882848B962430486C IE: Unknown: 03010B IE: Unknown: 050400010000 IE: Unknown: 2A0100 IE: Unknown: 2F0100 IE: Unknown: 32040C121860 IE: Unknown: DD060010180201F4 laptop arun # iw dev wlan0 scan command failed: Device or resource busy (-16) laptop arun # iw dev wlan0 scan BSS 00:08:5c:ec:05:a4 (on wlan0) TSF: 7946445194 usec (0d, 02:12:26) freq: 2462 beacon interval: 100 capability: ESS ShortSlotTime (0x0401) signal: -59.00 dBm last seen: 1708 ms ago SSID: HOME Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 DS Parameter set: channel 11 TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0 ERP: <no flags> Extended supported rates: 6.0 9.0 12.0 48.0 Following wireless drivers are loaded on my laptop - laptop arun # lsmod | grep iw iwl3945 73111 0 iwl_legacy 71134 1 iwl3945 mac80211 436455 2 iwl3945,iwl_legacy cfg80211 178679 3 iwl3945,iwl_legacy,mac80211 It should be noted that the problem occurs even when I enable wireless security (WPA2-PSK). When I enable WiFi security, the network manager keeps on asking the password after almost every minute, even though I supply the correct password, it didn't connect. It also happens on disabling wifi security. I did a lot of R&D on Internet but nothing worked. I installed wicd in place of network-manager but that too didn't help. Kindly help. Thanks and regards, Arun -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
