Hello all. Just got a new laptop (Acer Aspire 5250) and decided to install Ubuntu for the first time. Grabbed the 11.04 64-bit edition and did a clean install, and then all upgrades through Synaptic Package Manager. I found my built-in wireless PCIe card, an Atheros AR9285 (rev1) is responsible for system freezes (kernel panic).
Conditions: e If I have the ethernet cable plugged in, everything is fine. If I take out the ethernet cable, the system freezes in 5-15 seconds forcing a hard shutdown. If I boot up without the cable plugged in the system will freeze during boot-up or at the log-in screen. While the ethernet cable is plugged in, the system does connect to the wireless router successfully. I know this because after unplugging the ethernet cable, during the very short window I have gotten HTTP traffic through. Also, logging into the router from a different box, I can see the laptop as a client with the MAC address of the wireless card.
So far, I have read many threads on these forums and others and tried many things including:
- disabling wireless encryption
- installing a new kernel
- installing the compat-wireless package
Nothing was successful, so I have now done a complete reinstallation of Ubuntu 11.04 64-bit and want to give a fresh try following suggestions.
Here follows the requested output from the How-to-post Guide:
1 ) Machine Brand and Model (PC/Laptop):
2 ) Wireless Brand, Model and Wireless Chipset:
3 ) check interface:
steven@zanazabar:~$ lspci -nn | grep "Atheros"
06:00.0 Ethernet controller : Atheros Communications AR8152 v2.0 Fast Ethernet [1969:2062] (rev c1)
07:00.0 Network controller : Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
steven@zanazabar:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"xxxxxx"
Mode:Managed Frequency:2.422 GHz Access Point: xx:xx:xx:xx:xx:xx
Bit Rate=54 Mb/s Tx-Power=9 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=53/70 Signal level=-57 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:33 Missed beacon:0
4 ) Check for modules:
5 ) Kernel boot messages
steven@zanazabar:~$ lsmod | grep "ath"
ath9k 118238 0
mac80211 294370 1 ath9k
ath9k_common 13851 1 ath9k
ath9k_hw 323077 2 ath9k,ath9k_common
ath 23773 2 ath9k,ath9k_hw
cfg80211 178528 3 ath9k,mac80211,ath
6 ) Network configuration
steven@zanazabar:~$ dmesg | grep "ath"
[ 2.031646] device-mapper: multipath: version 1.2.0 loaded
[ 2.031660] device-mapper: multipath round-robin: version 1.0.0 loaded
[ 17.946436] ath9k 0000:07:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[ 17.946462] ath9k 0000:07:00.0: setting latency timer to 64
[ 17.998894] ath: EEPROM regdomain: 0x65
[ 17.998901] ath: EEPROM indicates we should expect a direct regpair map
[ 17.998910] ath: Country alpha2 being used: 00
[ 17.998915] ath: Regpair used: 0x65
[ 18.045067] ieee80211 phy0: Selected rate control algorithm 'ath9k_rate_control'
[ 18.047035] Registered led device: ath9k-phy0::radio
[ 18.047238] Registered led device: ath9k-phy0::assoc
[ 18.047432] Registered led device: ath9k-phy0::tx
[ 18.047555] Registered led device: ath9k-phy0::rx
7 ) Scan for networks:
steven@zanazabar:~$ sudo lshw -C wlan0
steven@zanazabar:~$ iwlist scan wlan0
wlan0 Scan completed :
Cell 01 - Address: xx:xx:xx:xx:xx:xx
Frequency:2.422 GHz (Channel 3)
Quality=51/70 Signal level=-59 dBm
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
Extra: Last beacon: 70340ms ago
IE: Unknown: 000B4372797374616C53686970
IE: Unknown: 010882848B962430486C
IE: Unknown: 030103
IE: Unknown: 2A0100
IE: Unknown: 2F0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: DD06001018020100
8 ) Ubuntu Version:
9 ) Kernel/architecture (including 32 vs. 64 bit):
steven@zanazabar:~$ lsb_release -d
Description: Ubuntu 11.04
10 ) Restarting the network:
steven@zanazabar:~$ uname -mr
steven@zanazabar:~$ sudo /etc/init.d/networking restart
* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
* Reconfiguring network interfaces... Ignoring unknown interface eth0=eth0.
Ignoring unknown interface wlan0=wlan0.
[ OK ]