Hi All: I've been having issues with a TP-LINK TL-WDN4800 PCI Express adapter  that seem to have become worse since upgrading to 10.1-RELEASE. Since then, I've had a couple of kernel panics. I use the adapter in hostapd mode as my main WiFi access point. I would appreciate any help in making my setup more reliable, and am open to trying to just about anything to help troubleshoot.
The problems that I see are regular disconnections from a Macbook Pro client. When this happens, sometimes the wifi icon says it is connected, but I cannot actually transmit anything to the host (i.e., pings fail). The only recourse is to turn the mbp's wifi off, then back on. This *usually* succeeds, but sometimes does not. I also have an iPad that has similar issues; turning wifi off and back on is usually sufficient to restore connectivity. This is my /etc/rc.conf: wlans_ath0="wlan0" create_args_wlan0="wlanmode hostap bssid" ifconfig_wlan0="HOSTAP ssid MiddleEarth mode 11ng channel 2" and /etc/hostapd-wlan0.conf: interface=wlan0 debug=2 ctrl_interface=/var/run/hostapd ctrl_interface_group=wheel ssid=MiddleEarth wpa=2 wpa_passphrase=xxxx wpa_key_mgmt=WPA-PSK wpa_pairwise=CCMP I see a lot of this in the logs: ath0: stuck beacon; resetting (bmiss count 8) However, from what I've read these are due to channel congestion and are to be expected. The kernel panics look like this: Fatal trap 18: integer divide fault while in kernel mode cpuid = 1; apic id = 11 instruction pointer = 0x20:0xffffffff8045161d stack pointer = 0x28:0xfffffe00e43bb760 frame pointer = 0x28:0xfffffe00e43bb7b0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, ath0: stuck beacon; resetting (bmiss count 8) resume, IOPL = 0 current process = 12 (swi4: clock) trap number = 18 panic: integer divide fault cpuid = 0 KDB: stack backtrace: #0 0xffffffff80963000 at kdb_backtrace+0x60 #1 0xffffffff80928125 at panic+0x155 #2 0xffffffff80d24f1f at trap_fatal+0x38f #3 0xffffffff80d24b7c at trap+0x75c #4 0xffffffff80d0a782 at calltrap+0x8 #5 0xffffffff8045b248 at ar9300_ani_poll_freebsd+0x48 #6 0xffffffff804093d6 at ath_calibrate+0xf6 #7 0xffffffff8093d557 at softclock_call_cc+0x177 #8 0xffffffff8093d994 at softclock+0x94 #9 0xffffffff808faf4b at intr_event_execute_handlers+0xab #10 0xffffffff808fb396 at ithread_loop+0x96 #11 0xffffffff808f8b6a at fork_exit+0x9a Here is the pciconf output: ath0@pci0:2:0:0: class=0x028000 card=0x3112168c chip=0x0030168c rev=0x01 hdr=0x00 vendor = 'Atheros Communications Inc.' device = 'AR9300 Wireless LAN adaptor' class = network 1. http://www.tp-link.com/lk/products/details/?model=TL-WDN4800 Thanks, David Blewett _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"