Date: Sun, 14 Dec 2014 11:39:13 -0800 From: Adrian Chadd <adrian@freebsd.org> To: David Blewett <david@dawninglight.net> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380) Message-ID: <CAJ-Vmony_WiAOcj2a3m5u7Nxz2K17TDG=pfhw5Qa%2BbEYhY6cNQ@mail.gmail.com> In-Reply-To: <CAFzAthbg6sc5Y_NBa5EanMK_qhBjaDEvE15mvLkSL5NzAT2BmA@mail.gmail.com> References: <CAFzAthbg6sc5Y_NBa5EanMK_qhBjaDEvE15mvLkSL5NzAT2BmA@mail.gmail.com>
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Hi! Hm, an integer divide by zero fault. Tsk. can you do this: kgdb /boot/kernel/kernel list *0xffffffff8045161d Thanks! -adrian On 14 December 2014 at 11:24, David Blewett <david@dawninglight.net> wrote: > Hi All: > > I've been having issues with a TP-LINK TL-WDN4800 PCI Express adapter [1] > 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 > _______________________________________________ > freebsd-wireless@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless > To unsubscribe, send any mail to "freebsd-wireless-unsubscribe@freebsd.org"
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