Hello,

unfortunately the problem in my case isn't in WEP or WPA. My wife is
using Ubuntu 8.10 on Acer laptop and she had problems with WPA
connections and that's why I first tried to solve my problem by
setting up an unencrypted WiFi connection. But that wasn't helping:
the network keeps on disappearing, most often after a S3 sleep state,
but occassionally during an active session as well.

Sometimes modprobing the ath5k module off and back helps, sometimes it
doesn't. Sometimes computer restart (or hibernate) helps, sometimes
not. If nothing else helps, I can restore the connection by first
booting to Windows and then back to Ubuntu! Yes, it sounds weird, but
I think that the wlan adapter goes to some power saving state that
Linux driver can not handle (and it needs Windows to rescue her -- so
embarrassing).

Mikko

2009/7/2 Eli Boaz <email address hidden>:
> Hi,
>
> I noticed the same thing. I chose to workaround the problem differently - I
> set up my wireless network without WEP or WPA, but restricted the MAC
> addresses that can communicate with the wireless access point. On top of the
> the wireless network, I've configured all my systems to establish a VPN to
> my home server and configured my router only allows traffic from the home
> server.
>
> Eli
>
> On Thu, Jul 2, 2009 at 11:53 AM, Mikko Taivainen
> <email address hidden>wrote:
>
>> I'm having the same problem with  Jaunty Netbook Remix on Samsung NC10.
>> Sometimes (although rarely) it helps to unload and reload a "ath5k"
>> kernel module.
>>
>>
>
> --
> Wireless connection is lost, cannot reconnect without reboot
> https://bugs.launchpad.net/bugs/372885
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in Ubuntu Netbook Remix: New
> Status in “linux-backports-modules-2.6.28” package in Ubuntu: New
>
> Bug description:
> I'm running Ubuntu Netbook Remix on an Acer Aspire One.
>
> This is the wireless card as indicated by lspci:
>
> Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01)
>
> I've installed linux-backports-modules-jaunty, and after booting, it connects to the network without any problems. However, after an unpredictable amount of time - may vary between a couple of hours and as little as five minutes - connection is lost, and the Network Applet shows the "reconnecting" animation.
>
> However, the Network Manager *will not* reconnect to any wireless network without rebooting.
>
> Desired behaviour:
>
> Wireless vard should not lose the connection,
>
> AND
>
> if it loses the connection, it should be possible to reconnect without rebooting.
>
> Here's some data about my configuration:
>
>
> lspci | grep Atheros
>
> 03:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01)
>
> lsusb
> Bus 001 Device 004: ID 0c45:62c0 Microdia Pavilion Webcam
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 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 002: ID 0f62:1001 Acrox Technologies Co., Ltd Targus Mini Trackball Optical Mouse
> Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>
>
> ifconfig wlan0
> wlan0     Link encap:Ethernet  HWaddr 00:23:4d:45:69:09
>          inet6 addr: fe80::223:4dff:fe45:6909/64 Scope:Link
>          UP BROADCAST MULTICAST  MTU:1500  Metric:1
>          RX packets:233902 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:150778 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:327670007 (327.6 MB)  TX bytes:15819365 (15.8 MB)
>
> iwconfig wlan0
> wlan0     IEEE 802.11bg  ESSID:""
>          Mode:Managed  Frequency:2.462 GHz  Access Point: Not-Associated
>          Tx-Power=27 dBm
>          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
>          Power Management:off
>          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
>
> lsmod | grep "ath"
> ath5k                 126724  0
> lbm_cw_mac80211       227364  3 rt2x00usb,rt2x00lib,ath5k
> lbm_cw_cfg80211        73760  3 rt2x00lib,ath5k,lbm_cw_mac80211
> led_class              12036  3 acer_wmi,rt2x00lib,ath5k
>
> sudo lshw -C network
> [sudo] password for agger:
>  *-network
>       description: Ethernet interface
>       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
>       vendor: Realtek Semiconductor Co., Ltd.
>       physical id: 0
>       bus info: pci@0000:02:00.0
>       logical name: eth0
>       version: 02
>       serial: 00:1e:68:d5:a9:5b
>       size: 10MB/s
>       capacity: 100MB/s
>       width: 64 bits
>       clock: 33MHz
>       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
>       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no module=r8169 multicast=yes port=MII speed=10MB/s
>  *-network
>       description: Wireless interface
>       product: AR242x 802.11abg Wireless PCI Express Adapter
>       vendor: Atheros Communications Inc.
>       physical id: 0
>       bus info: pci@0000:03:00.0
>       logical name: wmaster0
>       version: 01
>       serial: 00:23:4d:45:69:09
>       width: 64 bits
>       clock: 33MHz
>       capabilities: pm msi pciexpress msix cap_list logical ethernet physical wireless
>       configuration: broadcast=yes driver=ath5k latency=0 module=ath5k multicast=yes wireless=IEEE 802.11bg
>  *-network DISABLED
>       description: Ethernet interface
>       physical id: 1
>       logical name: pan0
>       serial: b2:70:a3:df:ed:1a
>       capabilities: ethernet physical
>       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes
>
> Kernel version: 2.6.28-11-generic i686, Ubuntu 9.04
>
>
>
>