On 02/23/2012 06:02 AM, Guilherme M. Schroeder wrote:
On Thu, Feb 23, 2012 at 2:46 AM, Guilherme M. Schroeder <guialemas@xxxxxxxxx> wrote:Hi, I'm using Linux 3.2.7 and brcmsmac with BCM43224 (MacBookAir4,2). I have a Time Capsule Dual Band AP (single SSID providing both bands). While using it, sometimes i lost connection with it and on dmesg (attached) i just see this: [14122.660359] ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 [14122.660405] ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 [14122.660456] ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 [14122.660501] ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 If you look at the log, you will see a lot of BA timeouts and reassociations with the AP. Some other strange messages too. I'm not too far from the router (but have some walls), here is what i get almost all the time: wlan0 IEEE 802.11abgn ESSID:"cala boca jow" Mode:Managed Frequency:2.412 GHz Access Point: 90:84:0D:D7:28:51 Bit Rate=57.8 Mb/s Tx-Power=19 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=34/70 Signal level=-76 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:1 Invalid misc:90 Missed beacon:0 And latency: --- 192.168.0.1 ping statistics --- 20 packets transmitted, 20 received, 0% packet loss, time 19022ms rtt min/avg/max/mdev = 0.750/4.346/30.749/7.148 ms When i lost connection, i can't ping the router, but i still have signal and i'm still connected in it. I need to turn wifi off and on to continue working. Do you now anything that can help avoiding this? If some debug is needed, let me know (i like doing this stuff). I really want to use brcmsmac as wl blob doesn't work nice (besides PM). BTW, do you have plans when PM will be developed for this driver? Thanks.Hmm, one thing that i noticed: [16101.221548] wlan0: authenticate with 90:84:0d:d7:28:51 (try 1) [16101.223232] wlan0: authenticated [14380.923563] wlan0: authenticate with 90:84:0d:d7:28:52 (try 1) [14381.122993] wlan0: authenticate with 90:84:0d:d7:28:52 (try 2) [14381.123583] wlan0: authenticated Maybe the driver is getting lost because of the Dual Band router using the same SSID? I think that one of this MACs is 2.4GHz and other is 5GHz, but i'm not sure. I also noticed this commit: http://git.kernel.org/?p=linux/kernel/git/linville/wireless-next.git;a=commitdiff;h=5e379203c7788b7af01150bfadbc74d2797a2ef4 Maybe it could help with the stack trace problem that i get (brcms_c_wait_for_tx_completion). I'm compiling wireless-next right now and see what happens.
That patch should certainly improve things. With A-MPDU retrying endlessly on 2.4 BSS, I can imagine mac80211 trying the other BSS with the same ESSID, ie. the 5G one.
Gr. AvS -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
