Hi! I recently upgraded my HP 2540p Laptop with Intel 6200 AGN to Fedora 16 and suddenly had big troubles keeping the machine stable. After a while I nailed it down to iwlagn in all available kernels for F16. 3.1.0 - 3.1.4. Meanwhile I'm running wireless-compat iwlwifi from today (with the regression patch from Nikolay) but the troubles are still there. Kernel is the latest from F16 (3.1.4). Cards PCI-Id: 8086:4239 (rev 35) dmesg from iwlwifi: > [ 11.091363] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:d > [ 11.091366] Copyright(c) 2003-2011 Intel Corporation > [ 11.091429] iwlwifi 0000:43:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19 > [ 11.091438] iwlwifi 0000:43:00.0: setting latency timer to 64 > [ 11.091459] iwlwifi 0000:43:00.0: pci_resource_len = 0x00002000 > [ 11.091461] iwlwifi 0000:43:00.0: pci_resource_base = fb444000 > [ 11.091464] iwlwifi 0000:43:00.0: HW Revision ID = 0x35 > [ 11.091537] iwlwifi 0000:43:00.0: irq 49 for MSI/MSI-X > [ 11.091592] iwlwifi 0000:43:00.0: CONFIG_IWLWIFI_DEBUG enabled > [ 11.091594] iwlwifi 0000:43:00.0: CONFIG_IWLWIFI_DEBUGFS enabled > [ 11.091596] iwlwifi 0000:43:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled > [ 11.091598] iwlwifi 0000:43:00.0: CONFIG_IWLWIFI_DEVICE_SVTOOL enabled > [ 11.091605] iwlwifi 0000:43:00.0: Detected Intel(R) Centrino(R) Advanced-N 6200 AGN, REV=0x74 > [ 11.091724] iwlwifi 0000:43:00.0: L1 Disabled; Enabling L0S > [ 11.107567] iwlwifi 0000:43:00.0: device EEPROM VER=0x436, CALIB=0x6 > [ 11.107570] iwlwifi 0000:43:00.0: Device SKU: 0X1f0 > [ 11.107596] iwlwifi 0000:43:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels > [ 11.116014] iwlwifi 0000:43:00.0: loaded firmware version 9.221.4.1 build 25532 > [ 11.116327] Registered led device: phy0-led wpa_supplicant is: wpa_supplicant-0.7.3-11.fc16.i686 driven by NetworkManager: NetworkManager-0.9.2-1.fc16.i686 via wext. I've two APs for tests. One is a Ubiquiti UniFi bgn (also Atheros/hostapd based). No problems with this one so far. Works like a charm. The other one is my Soekris 4801 equipped with an 00:0e.0 168c:001a Ethernet controller: Atheros Communications Inc. AR2413 802.11bg NIC (rev 01) running on openwrt 10.x with hostapd. If I connect to this one and start eg. videostreaming it takes only a few minutes and my machine gets completly unstable. Various applications crash, sounds starts crackling, video gets artefacts. Also doing large downloads helps to kill various components. gnome-shell, firefox, ... looks like iwlwifi writes random memory. Scanresults from "iw wlan0 scan" for this AP: BSS 00:80:48:xx:xx:xx (on wlan0) TSF: 58415136285 usec (0d, 16:13:35) freq: 2437 beacon interval: 100 capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431) signal: -45.00 dBm last seen: 4490 ms ago SSID: xxxx Supported rates: 1.0* 2.0* 5.5* 6.0 9.0 11.0* 12.0 18.0 DS Parameter set: channel 6 ERP: <no flags> Extended supported rates: 24.0 36.0 48.0 54.0 WMM: * Parameter version 1 * BE: CW 7-1023, AIFSN 2, TXOP 2048 usec * BK: CW 15-1023, AIFSN 7 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec * VO: acm CW 3-7, AIFSN 2, TXOP 1504 usec RSN: * Version: 1 * Group cipher: TKIP * Pairwise ciphers: CCMP TKIP * Authentication suites: PSK * Capabilities: (0x0000) Usually I use CCMP only, but activated TKIP for testing purposes. But it makes no difference at all. I activated debug output from iwlwifi and besides the recurring > Dec 9 14:42:17 hpwb kernel: [ 616.473854] iwlwifi 0000:43:00.0: U iwlagn_request_scan Scanning while associated... > Dec 9 14:42:17 hpwb kernel: [ 616.473866] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Attempting to send sync command REPLY_SCAN_CMD > Dec 9 14:42:17 hpwb kernel: [ 616.473869] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Setting HCMD_ACTIVE for command REPLY_SCAN_CMD > Dec 9 14:42:17 hpwb kernel: [ 616.476081] iwlwifi 0000:43:00.0: I iwl_tx_cmd_complete Clearing HCMD_ACTIVE for command REPLY_SCAN_CMD ... I very often see stuff like... > Dec 9 14:42:07 hpwb kernel: [ 606.751372] iwlwifi 0000:43:00.0: I iwl_force_reset force reset rejected > Dec 9 14:42:13 hpwb kernel: [ 612.907705] iwlwifi 0000:43:00.0: I is_lq_table_valid Channel 6 is not an HT channel > Dec 9 14:42:13 hpwb kernel: [ 612.932685] iwlwifi 0000:43:00.0: I is_lq_table_valid Channel 6 is not an HT channel > Dec 9 14:42:17 hpwb kernel: [ 616.473816] iwlwifi 0000:43:00.0: I iwl_force_reset perform force reset (0) > Dec 9 14:42:17 hpwb kernel: [ 616.473825] iwlwifi 0000:43:00.0: I iwl_force_rf_reset perform radio reset. Another difference between the two APs is that my soekris uses rekeying. I don't have proof yet that it's the cause, but troubles often start after I see.... > Dec 9 14:47:23 hpwb kernel: [ 922.682961] iwlwifi 0000:43:00.0: I iwl_tx_cmd_complete Clearing HCMD_ACTIVE for command REPLY_SCAN_CMD > Dec 9 14:47:23 hpwb kernel: [ 922.885333] iwlwifi 0000:43:00.0: I iwl_force_reset force reset rejected > Dec 9 14:47:27 hpwb kernel: [ 926.672222] iwlwifi 0000:43:00.0: I iwl_force_reset perform force reset (0) > Dec 9 14:47:27 hpwb kernel: [ 926.672233] iwlwifi 0000:43:00.0: I iwl_force_rf_reset perform radio reset. > Dec 9 14:47:27 hpwb kernel: [ 926.672254] iwlwifi 0000:43:00.0: U iwlagn_request_scan Scanning while associated... > Dec 9 14:47:27 hpwb kernel: [ 926.672265] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Attempting to send sync command REPLY_SCAN_CMD > Dec 9 14:47:27 hpwb kernel: [ 926.672271] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Setting HCMD_ACTIVE for command REPLY_SCAN_CMD > Dec 9 14:47:27 hpwb kernel: [ 926.674473] iwlwifi 0000:43:00.0: I iwl_tx_cmd_complete Clearing HCMD_ACTIVE for command REPLY_SCAN_CMD > Dec 9 14:47:33 hpwb kernel: [ 932.686199] iwlwifi 0000:43:00.0: U iwl_send_add_sta Adding sta 0 (00:80:48:xx:xx:xx) synchronously > Dec 9 14:47:33 hpwb kernel: [ 932.686209] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Attempting to send sync command REPLY_ADD_STA > Dec 9 14:47:33 hpwb kernel: [ 932.686214] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Setting HCMD_ACTIVE for command REPLY_ADD_STA > Dec 9 14:47:33 hpwb kernel: [ 932.686271] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Processing response for adding station 0 > Dec 9 14:47:33 hpwb kernel: [ 932.686278] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp REPLY_ADD_STA PASSED > Dec 9 14:47:33 hpwb kernel: [ 932.686285] iwlwifi 0000:43:00.0: I iwl_sta_ucode_activate STA id 0 addr 00:80:48:xx:xx:xx already present in uCode (according to driver) > Dec 9 14:47:33 hpwb kernel: [ 932.686294] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Added station id 0 addr 00:80:48:xx:xx:xx > Dec 9 14:47:33 hpwb kernel: [ 932.686302] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Added station according to cmd buffer 00:80:48:xx:xx:xx > Dec 9 14:47:33 hpwb kernel: [ 932.686313] iwlwifi 0000:43:00.0: I iwl_tx_cmd_complete Clearing HCMD_ACTIVE for command REPLY_ADD_STA > Dec 9 14:47:33 hpwb kernel: [ 932.686423] iwlwifi 0000:43:00.0: U iwl_send_add_sta Adding sta 0 (00:80:48:xx:xx:xx) synchronously > Dec 9 14:47:33 hpwb kernel: [ 932.686430] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Attempting to send sync command REPLY_ADD_STA > Dec 9 14:47:33 hpwb kernel: [ 932.686437] iwlwifi 0000:43:00.0: U iwl_send_cmd_sync Setting HCMD_ACTIVE for command REPLY_ADD_STA > Dec 9 14:47:33 hpwb kernel: [ 932.686487] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Processing response for adding station 0 > Dec 9 14:47:33 hpwb kernel: [ 932.686499] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp REPLY_ADD_STA PASSED > Dec 9 14:47:33 hpwb kernel: [ 932.686509] iwlwifi 0000:43:00.0: I iwl_sta_ucode_activate STA id 0 addr 00:80:48:xx:xx:xx already present in uCode (according to driver) > Dec 9 14:47:33 hpwb kernel: [ 932.686522] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Added station id 0 addr 00:80:48:xx:xx:xx > Dec 9 14:47:33 hpwb kernel: [ 932.686533] iwlwifi 0000:43:00.0: I iwl_process_add_sta_resp Added station according to cmd buffer 00:80:48:xx:xx:xx > Dec 9 14:47:33 hpwb kernel: [ 932.686546] iwlwifi 0000:43:00.0: I iwl_tx_cmd_complete Clearing HCMD_ACTIVE for command REPLY_ADD_STA > Dec 9 14:47:34 hpwb kernel: [ 933.835898] iwlwifi 0000:43:00.0: I iwl_force_reset perform force reset (0) > Dec 9 14:47:34 hpwb kernel: [ 933.835908] iwlwifi 0000:43:00.0: I iwl_force_rf_reset perform radio reset. wpa_supplicant said: WPA: Group rekeying completed with 00:80:48:xx:xx:xx [GTK=TKIP] at that time. There're no crashdumps in dmesg! If you need more information or debug output please let me know. With kind regards, Wolfgang Breyha -- Wolfgang Breyha <wbreyha@xxxxxxx> | http://www.blafasel.at/ Vienna University Computer Center | Austria -- 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
