Date: Sun, 14 Dec 2014 14:53:59 -0500 From: David Blewett <david@dawninglight.net> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Problem with Atheros adapter (TP-LINK TL-WDN4800, AR9380) Message-ID: <CAFzAthaGfsGup8np5BvciTOxoy7-Hr4_wUC285L=NvGn_xt4yg@mail.gmail.com> In-Reply-To: <CAJ-Vmony_WiAOcj2a3m5u7Nxz2K17TDG=pfhw5Qa%2BbEYhY6cNQ@mail.gmail.com> References: <CAFzAthbg6sc5Y_NBa5EanMK_qhBjaDEvE15mvLkSL5NzAT2BmA@mail.gmail.com> <CAJ-Vmony_WiAOcj2a3m5u7Nxz2K17TDG=pfhw5Qa%2BbEYhY6cNQ@mail.gmail.com>
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If this would be easier on IRC, I'm BlueAidan on Freenode.
Output:
(kgdb) list *0xffffffff8045161d
0xffffffff8045161d is in ar9300_ani_ar_poll
(/usr/src/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_ani.c:1180).
1175 */
1176 if (!DO_ANI(ah)) {
1177 return;
1178 }
1179
1180 ofdm_phy_err_rate =
1181 ani_state->ofdm_phy_err_count * 1000 /
ani_state->listen_time;
1182 cck_phy_err_rate =
1183 ani_state->cck_phy_err_count * 1000 /
ani_state->listen_time;
1184
Thanks,
David Blewett
On Sun, Dec 14, 2014 at 2:39 PM, Adrian Chadd <adrian@freebsd.org> wrote:
>
> 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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