[The first time I sent this I was not subscribed from this email address, and the email did not appear to make it through to the list. I've changed my subscription, so let me try again. Apologies if this ultimately goes through twice.]
Hello- In general, I have found ath9k to work beautifully on two home networks, even with WPA -- thank you very much to all of the kernel and ath9k developers. However, on my tremendously high-traffic 802.11abgn network, the card has some serious issues. It will associate and eventually obtain a DHCP IP address, but will usually only work for less than a minute before behaving very strangely. The card and userspace seem to think they are still connected, but it is hard to get any information to be transmitted. Sometimes a packet will get through after this, but it is rare. A capture from such a time is available at http://www.contrib.andrew.cmu.edu/~jwatzman/huge.gz -- this is a ~9M gzip expanding into a ~50M pcap capture, from a monitor interface running during such a session. Beware that there are about 2 million packets recorded during during a less than 5 minute time period. I was successful for a DCHP IP, but was dropped very shortly thereafter. If you filter by my IP (see below), you can see a series of pings which *seem* to go through according to the monitor interface, but userspace never saw the responses; the ping command even hung for a while after a control-C. More pings and DNS lookups were attempted, but neither transmissions nor responses were reported on the monitor interface. More interestingly, if I connect via 802.11a (or n, not sure) in the 5Ghz range, it works... better. I'm less likely to get dropped, and am sending this email that way, but I still occasionally fall off of the network. Everything works fine in OS X on this Macbook, but I am not the only one having problems in Linux; the specifics of the problems vary from person to person, but getting periodically dropped is pretty common among cards even other than ath9k (should I send this to the general linux-wireless list as well?) If anyone has any insight, that would be great! Or if I need to provide more info, or try another capture, I'm happy to. Thanks, Josh Watzman ------------ IP at the time: 128.237.242.148 MAC: 00:17:f2:e6:9a:f0 iwconfig: wlan0 IEEE 802.11abgn ESSID:"CMU" Mode:Managed Frequency:2.462 GHz Access Point: 00:1A:1E:90:F8:40 Bit Rate=11 Mb/s Tx-Power=20 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Power Management:off Link Quality=69/70 Signal level=-41 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 dmesg at the time (I think -- I tried a few different AP's before I managed to get a good capture): [ 314.213122] device mon0 entered promiscuous mode [ 316.077036] wlan0: deauthenticating by local choice (reason=3) [ 319.739537] wlan0: authenticate with AP ffff88007c5e59e0 [ 319.741821] wlan0: authenticated [ 319.741826] wlan0: associate with AP ffff88007c5e59e0 [ 319.745062] wlan0: RX AssocResp from ffff880064c1210a (capab=0x21 status=0 aid=2) [ 319.745068] wlan0: associated dmesg of a reprobe of ath9k: [ 974.570520] ath9k 0000:03:00.0: PCI INT A disabled [ 974.570576] ath9k: Driver unloaded [ 977.199229] ath9k 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 977.199252] ath9k 0000:03:00.0: setting latency timer to 64 [ 977.331477] phy1: Selected rate control algorithm 'ath9k_rate_control' [ 977.334882] Registered led device: ath9k-phy1::radio [ 977.334934] Registered led device: ath9k-phy1::assoc [ 977.334973] Registered led device: ath9k-phy1::tx [ 977.335014] Registered led device: ath9k-phy1::rx [ 977.335035] phy1: Atheros AR5418 MAC/BB Rev:2 AR5133 RF Rev:81: mem=0xffffc20004a40000, irq=17 iwlist scan: (incidentally, running "iwlist scan" causes me to drop from the AP, though I suspect this is a different problem, and is much more minor.) wlan0 Scan completed : Cell 01 - Address: 00:1A:1E:90:EA:C0 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=52/70 Signal level=-58 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000431fca180 Extra: Last beacon: 3076ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030101 IE: Unknown: 2A0107 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D1601001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C3401001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 02 - Address: 00:1A:1E:93:2D:20 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=31/70 Signal level=-79 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000000006bd180 Extra: Last beacon: 3096ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030101 IE: Unknown: 050400010000 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D1601000A000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C3401000A000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 03 - Address: 00:1A:1E:90:FB:80 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=60/70 Signal level=-50 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=000000000032e9ac Extra: Last beacon: 3092ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030101 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16010008000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C34010008000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 04 - Address: 00:1A:1E:90:F9:20 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=29/70 Signal level=-81 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000000013ec21b Extra: Last beacon: 3088ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030101 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16010008000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C34010008000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 05 - Address: 00:1A:1E:90:FB:40 Channel:6 Frequency:2.437 GHz (Channel 6) Quality=61/70 Signal level=-49 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000003e6ac771d6 Extra: Last beacon: 2772ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030106 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16060019000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C34060019000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 06 - Address: 00:1A:1E:90:FA:E0 Channel:6 Frequency:2.437 GHz (Channel 6) Quality=41/70 Signal level=-69 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000001c2179ac6 Extra: Last beacon: 2768ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030106 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D1606001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C3406001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 07 - Address: 00:1A:1E:90:EA:20 Channel:6 Frequency:2.437 GHz (Channel 6) Quality=49/70 Signal level=-61 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000001bd526e Extra: Last beacon: 2756ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 030106 IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16060008000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C34060008000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 08 - Address: 00:1A:1E:90:E9:C0 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=34/70 Signal level=-76 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000000d0c87180 Extra: Last beacon: 2484ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 03010B IE: Unknown: 050400010000 IE: Unknown: 2A0100 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D160B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C340B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 09 - Address: 00:1A:1E:90:FB:90 Channel:36 Frequency:5.18 GHz (Channel 36) Quality=43/70 Signal level=-67 dBm Encryption key:off ESSID:"CMU" Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=000000003cf7d066 Extra: Last beacon: 2388ms ago IE: Unknown: 0003434D55 IE: Unknown: 01088C129824B048606C IE: Unknown: 030124 IE: Unknown: 050400010000 IE: Unknown: 2D1A4E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D16240508000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C34240508000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 10 - Address: 00:1A:1E:90:F8:50 Channel:44 Frequency:5.22 GHz (Channel 44) Quality=61/70 Signal level=-49 dBm Encryption key:off ESSID:"CMU" Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000ddd2875f4 Extra: Last beacon: 40ms ago IE: Unknown: 0003434D55 IE: Unknown: 01088C129824B048606C IE: Unknown: 03012C IE: Unknown: 2D1A4E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D162C0508000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C342C0508000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 11 - Address: 00:1A:1E:90:E7:C0 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=34/70 Signal level=-76 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000000c673ee Extra: Last beacon: 2480ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 03010B IE: Unknown: 050400010100 IE: Unknown: 2A0107 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D160B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C340B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 12 - Address: 00:1A:1E:91:00:C0 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=53/70 Signal level=-57 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000000d2f1e6 Extra: Last beacon: 2448ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 03010B IE: Unknown: 2A0107 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D160B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C340B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 13 - Address: 00:1A:1E:90:F8:40 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=69/70 Signal level=-41 dBm Encryption key:off ESSID:"CMU" Bit Rates:11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000000000096226 Extra: Last beacon: 2448ms ago IE: Unknown: 0003434D55 IE: Unknown: 01079618243048606C IE: Unknown: 03010B IE: Unknown: 2A0102 IE: Unknown: 2D1A4C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D160B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334C1003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C340B001B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 Cell 14 - Address: 00:1A:1E:90:FB:50 Channel:44 Frequency:5.22 GHz (Channel 44) Quality=39/70 Signal level=-71 dBm Encryption key:off ESSID:"CMU" Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=000000070c966121 Extra: Last beacon: 2088ms ago IE: Unknown: 0003434D55 IE: Unknown: 01088C129824B048606C IE: Unknown: 03012C IE: Unknown: 2D1A4E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: 3D162C051B000000FFFF0000000000000000000000000000 IE: Unknown: DD1E00904C334E0003FFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C342C051B000000FFFF0000000000000000000000000000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 IE: Unknown: DD0A00037F04010000000000 _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
