Hi, I installed the jaunty "netbook remix" on my new Acer Aspire ONE. I noticed that my wifi connection was unstable to the point that even apt-get would sometimes fail to download some packages. Reported signal levels were around 40% in a room where a Lenovo T61 with an Intel wifi adapter was reporting 70+%. Playing media from an nfs share was impossible; the connection would start going away after 2-3 minutes. Even lengthy terminal output in an ssh session was enough to cause the connection to be dropped for a few seconds. The kernel log contained lines like "ath5k phy0: unsupported jumbo", but I read that these messages were benign. Additionally, the following was logged: May 9 13:01:53 cherub kernel: [ 478.120915] ath5k phy0: unsupported jumbo May 9 13:02:38 cherub kernel: [ 523.132095] wlan0: no probe response from AP 00:0d:88:c9:04:7f - disassociating May 9 13:02:39 cherub kernel: [ 524.451738] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:02:39 cherub kernel: [ 524.453292] wlan0: authenticated May 9 13:02:39 cherub kernel: [ 524.453304] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:39 cherub kernel: [ 524.455771] wlan0: RX ReassocResp from 00:0d:88:c9:04:7f (capab=0x431 status=0 aid=36) May 9 13:02:39 cherub kernel: [ 524.455784] wlan0: associated May 9 13:02:47 cherub kernel: [ 532.466673] wlan0: deauthenticated (Reason: 14) May 9 13:02:48 cherub kernel: [ 533.468165] wlan0: direct probe to AP 00:0d:88:c9:04:7f try 1 May 9 13:02:48 cherub kernel: [ 533.470573] wlan0 direct probe responded May 9 13:02:48 cherub kernel: [ 533.470584] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:02:48 cherub kernel: [ 533.472694] wlan0: authenticated May 9 13:02:48 cherub kernel: [ 533.472702] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:48 cherub kernel: [ 533.474883] wlan0: RX ReassocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:48 cherub kernel: [ 533.474895] wlan0: AP denied association (code=12) May 9 13:02:49 cherub kernel: [ 533.672099] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:49 cherub kernel: [ 533.674290] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:49 cherub kernel: [ 533.674303] wlan0: AP denied association (code=12) May 9 13:02:49 cherub kernel: [ 533.872103] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:49 cherub kernel: [ 533.874273] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:49 cherub kernel: [ 533.874285] wlan0: AP denied association (code=12) May 9 13:02:49 cherub kernel: [ 534.072078] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:02:50 cherub kernel: [ 535.300607] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:02:50 cherub kernel: [ 535.302079] wlan0: authenticated May 9 13:02:50 cherub kernel: [ 535.302094] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:50 cherub kernel: [ 535.305217] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:50 cherub kernel: [ 535.305233] wlan0: AP denied association (code=12) May 9 13:02:50 cherub kernel: [ 535.502579] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:50 cherub kernel: [ 535.504841] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:50 cherub kernel: [ 535.504855] wlan0: AP denied association (code=12) May 9 13:02:51 cherub kernel: [ 535.700109] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:02:51 cherub kernel: [ 535.702330] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:02:51 cherub kernel: [ 535.702347] wlan0: AP denied association (code=12) May 9 13:02:51 cherub kernel: [ 535.900124] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:02 cherub kernel: [ 546.520042] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:02 cherub kernel: [ 546.521782] wlan0: authenticated May 9 13:03:02 cherub kernel: [ 546.521793] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:02 cherub kernel: [ 546.527902] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:02 cherub kernel: [ 546.527915] wlan0: AP denied association (code=12) May 9 13:03:02 cherub kernel: [ 546.624094] wlan0: deauthenticating by local choice (reason=3) May 9 13:03:02 cherub kernel: [ 546.937792] ADDRCONF(NETDEV_UP): wlan0: link is not ready May 9 13:03:02 cherub kernel: [ 546.990485] wlan0: deauthenticating by local choice (reason=3) May 9 13:03:02 cherub kernel: [ 547.184951] ADDRCONF(NETDEV_UP): wlan0: link is not ready May 9 13:03:03 cherub kernel: [ 548.391983] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:03 cherub kernel: [ 548.393520] wlan0: authenticated May 9 13:03:03 cherub kernel: [ 548.393532] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:03 cherub kernel: [ 548.395837] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:03 cherub kernel: [ 548.395849] wlan0: AP denied association (code=12) May 9 13:03:04 cherub kernel: [ 548.593065] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:04 cherub kernel: [ 548.595249] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:04 cherub kernel: [ 548.595261] wlan0: AP denied association (code=12) May 9 13:03:04 cherub kernel: [ 548.793115] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:04 cherub kernel: [ 548.795347] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:04 cherub kernel: [ 548.795364] wlan0: AP denied association (code=12) May 9 13:03:04 cherub kernel: [ 548.992090] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:08 cherub kernel: [ 552.613402] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:08 cherub kernel: [ 552.614954] wlan0: authenticated May 9 13:03:08 cherub kernel: [ 552.614965] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:08 cherub kernel: [ 552.617606] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:08 cherub kernel: [ 552.617617] wlan0: AP denied association (code=12) May 9 13:03:08 cherub kernel: [ 552.812080] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:08 cherub kernel: [ 552.814228] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:08 cherub kernel: [ 552.814244] wlan0: AP denied association (code=12) May 9 13:03:08 cherub kernel: [ 553.012125] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:08 cherub kernel: [ 553.014367] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:08 cherub kernel: [ 553.014389] wlan0: AP denied association (code=12) May 9 13:03:08 cherub kernel: [ 553.212062] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:13 cherub kernel: [ 557.677071] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:13 cherub kernel: [ 557.678623] wlan0: authenticated May 9 13:03:13 cherub kernel: [ 557.678633] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:13 cherub kernel: [ 557.681074] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:13 cherub kernel: [ 557.681086] wlan0: AP denied association (code=12) May 9 13:03:13 cherub kernel: [ 557.880124] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:13 cherub kernel: [ 557.884145] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:13 cherub kernel: [ 557.884156] wlan0: AP denied association (code=12) May 9 13:03:13 cherub kernel: [ 558.076090] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:13 cherub kernel: [ 558.078414] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:13 cherub kernel: [ 558.078430] wlan0: AP denied association (code=12) May 9 13:03:13 cherub kernel: [ 558.276067] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:18 cherub kernel: [ 562.834670] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:18 cherub kernel: [ 562.836422] wlan0: authenticated May 9 13:03:18 cherub kernel: [ 562.836434] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:18 cherub kernel: [ 562.838473] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:18 cherub kernel: [ 562.838583] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:18 cherub kernel: [ 562.840268] wlan0: authenticated May 9 13:03:18 cherub kernel: [ 562.840280] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:18 cherub kernel: [ 562.843946] wlan0: deauthenticated (Reason: 6) May 9 13:03:19 cherub kernel: [ 563.841078] wlan0: direct probe to AP 00:0d:88:c9:04:7f try 1 May 9 13:03:19 cherub kernel: [ 563.843479] wlan0 direct probe responded May 9 13:03:19 cherub kernel: [ 563.843492] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:19 cherub kernel: [ 563.846055] wlan0: authenticated May 9 13:03:19 cherub kernel: [ 563.846067] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:19 cherub kernel: [ 563.848172] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:19 cherub kernel: [ 563.848185] wlan0: AP denied association (code=12) May 9 13:03:19 cherub kernel: [ 564.045105] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:19 cherub kernel: [ 564.047965] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:19 cherub kernel: [ 564.047986] wlan0: AP denied association (code=12) May 9 13:03:19 cherub kernel: [ 564.244141] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:24 cherub kernel: [ 568.962230] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:24 cherub kernel: [ 568.963788] wlan0: authenticated May 9 13:03:24 cherub kernel: [ 568.963802] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:24 cherub kernel: [ 568.966168] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:24 cherub kernel: [ 568.966184] wlan0: AP denied association (code=12) May 9 13:03:24 cherub kernel: [ 569.161074] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:24 cherub kernel: [ 569.163213] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:24 cherub kernel: [ 569.163229] wlan0: AP denied association (code=12) May 9 13:03:24 cherub kernel: [ 569.362820] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:24 cherub kernel: [ 569.364987] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:24 cherub kernel: [ 569.365008] wlan0: AP denied association (code=12) May 9 13:03:25 cherub kernel: [ 569.564140] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:29 cherub kernel: [ 574.099581] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:29 cherub kernel: [ 574.101157] wlan0: authenticated May 9 13:03:29 cherub kernel: [ 574.101166] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:29 cherub kernel: [ 574.103648] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:29 cherub kernel: [ 574.103658] wlan0: AP denied association (code=12) May 9 13:03:29 cherub kernel: [ 574.300235] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:29 cherub kernel: [ 574.302363] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:29 cherub kernel: [ 574.302377] wlan0: AP denied association (code=12) May 9 13:03:29 cherub kernel: [ 574.501725] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:29 cherub kernel: [ 574.503858] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:29 cherub kernel: [ 574.503874] wlan0: AP denied association (code=12) May 9 13:03:30 cherub kernel: [ 574.700064] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:34 cherub kernel: [ 579.179020] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:34 cherub kernel: [ 579.181052] wlan0: authenticated May 9 13:03:34 cherub kernel: [ 579.181063] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:34 cherub kernel: [ 579.183758] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:34 cherub kernel: [ 579.183770] wlan0: AP denied association (code=12) May 9 13:03:34 cherub kernel: [ 579.380055] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:34 cherub kernel: [ 579.382154] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:34 cherub kernel: [ 579.382163] wlan0: AP denied association (code=12) May 9 13:03:35 cherub kernel: [ 579.580392] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:35 cherub kernel: [ 579.582508] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:35 cherub kernel: [ 579.582520] wlan0: AP denied association (code=12) May 9 13:03:35 cherub kernel: [ 579.780062] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:39 cherub kernel: [ 584.299407] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:39 cherub kernel: [ 584.300962] wlan0: authenticated May 9 13:03:39 cherub kernel: [ 584.300974] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:39 cherub kernel: [ 584.303268] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:39 cherub kernel: [ 584.303282] wlan0: AP denied association (code=12) May 9 13:03:39 cherub kernel: [ 584.500068] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:39 cherub kernel: [ 584.502432] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:39 cherub kernel: [ 584.502449] wlan0: AP denied association (code=12) May 9 13:03:40 cherub kernel: [ 584.700080] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:40 cherub kernel: [ 584.702260] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:40 cherub kernel: [ 584.702273] wlan0: AP denied association (code=12) May 9 13:03:40 cherub kernel: [ 584.901734] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:44 cherub kernel: [ 589.349249] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:44 cherub kernel: [ 589.354920] wlan0: authenticated May 9 13:03:44 cherub kernel: [ 589.354932] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:44 cherub kernel: [ 589.357211] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:44 cherub kernel: [ 589.357224] wlan0: AP denied association (code=12) May 9 13:03:45 cherub kernel: [ 589.552049] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:45 cherub kernel: [ 589.554146] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:45 cherub kernel: [ 589.554155] wlan0: AP denied association (code=12) May 9 13:03:45 cherub kernel: [ 589.756063] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:45 cherub kernel: [ 589.758225] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=12 aid=0) May 9 13:03:45 cherub kernel: [ 589.758239] wlan0: AP denied association (code=12) May 9 13:03:45 cherub kernel: [ 589.952075] wlan0: association with AP 00:0d:88:c9:04:7f timed out May 9 13:03:49 cherub kernel: [ 594.456558] wlan0: authenticate with AP 00:0d:88:c9:04:7f May 9 13:03:49 cherub kernel: [ 594.458090] wlan0: authenticated May 9 13:03:49 cherub kernel: [ 594.458101] wlan0: associate with AP 00:0d:88:c9:04:7f May 9 13:03:49 cherub kernel: [ 594.460796] wlan0: RX AssocResp from 00:0d:88:c9:04:7f (capab=0x431 status=0 aid=36) May 9 13:03:49 cherub kernel: [ 594.460806] wlan0: associated May 9 13:03:49 cherub kernel: [ 594.463050] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready May 9 13:04:00 cherub kernel: [ 604.832073] wlan0: no IPv6 routers present May 9 13:10:01 cherub kernel: [ 966.448500] ath5k phy0: unsupported jumbo I don't know how much of this was caused by NetworkManager's activity. I upgraded to karmic, but had the same problem with the ath5k driver in the 2.6.30-2 kernel that ships with it. In order to rule out a hardware defect, I compiled madwifi HEAD (r4020) and tried with that, and so far the connection seems to be stable (although reported signal levels are still pretty low). This leads me to believe that this is a bug in the ath5k driver, which is why I'm filing the report against linux-image-generic. I only tested with a single Micronet AP, with WPA-PSK. The relevant bit from lspci is this: 03:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter [168c:001c] (rev 01) Subsystem: Foxconn International, Inc. Device [105b:e008] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Capabilities: [140] Virtual Channel Kernel driver in use: ath_pci Kernel modules: ath_pci, ath5k The ath5k driver in 2.6.30-2-generic detected the card thusly: [ 11.178534] acer-wmi: Acer Laptop ACPI-WMI Extras [ 11.178543] acer-wmi: Blacklisted hardware detected - not loading [ 11.255946] ath5k 0000:03:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 11.256066] ath5k 0000:03:00.0: setting latency timer to 64 [ 11.256171] ath5k 0000:03:00.0: registered as 'phy0' [ 11.328587] phy0: Selected rate control algorithm 'minstrel' [ 11.474710] Registered led device: ath5k-phy0::rx [ 11.474751] Registered led device: ath5k-phy0::tx [ 11.474759] ath5k phy0: Atheros AR2425 chip found (MAC: 0xe2, PHY: 0x70) When using madwifi, I see: [ 11.544193] ath_pci 0000:03:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 11.544259] ath_pci 0000:03:00.0: setting latency timer to 64 [...] [ 11.889459] acer-wmi: Acer Laptop ACPI-WMI Extras [ 11.889469] acer-wmi: Blacklisted hardware detected - not loading [ 12.062080] MadWifi: ath_attach: Switching rfkill capability off. [ 12.095518] wifi0: Atheros AR2425 chip found (MAC 14.2, PHY SChip 7.0, Radio 10.2) [ 12.136177] ath_pci: wifi0: Atheros 5424/2424: mem=0x55200000, irq=18 I'm somewhat able to test stuff that you may suggest, but my RTT is probably going to be awful, sorry. Andras