On Wednesday 15 August 2007 10:50, Johannes Berg wrote: > On Wed, 2007-08-08 at 23:24 +0100, Adam Baker wrote: > > a) If anyone can see anything obvious wrong in the trace > > b) If anyone has recently tested ad-hoc mode with another driver and can > > confirm it works. > > Neither. > > > The sequence of events that leads to the crash is > > iwconfig wlan1 mode ad-hoc > > ifconfig wlan1 192.168.0.230 > > iwconfig wlan1 channel 11 > > iwconfig wlan1 essid test > > > > then attempt a scan from another device. > > Very weird. Can you please enable verbose debugging and also add a few > printks to various lines of the code in ieee80211_tx_h_multicast_ps_buf > and ieee80211_tx_h_unicast_ps_buf? Both ought to be fine as far as I can > tell and the STA scanning shouldn't be in powersave mode either so this > is a bit strange. > Today the most reliable way to crash it seems to be to start a scan locally, i.e. iwlist wlan1 scan rather than from a different machine. I've appied Ivo's patch and enabled CONFIG_MAC80211_VERBOSE_DEBUG=y CONFIG_MAC80211_VERBOSE_PS_DEBUG=y and I then see in syslog shortly before the crash I guess this is indicating something is attempting to power save when it shouldn't so that gives me a clue where to try adding printk's Aug 15 22:28:20 gromit kernel: [ 286.592323] wlan1: Creating new IBSS network, BSSID 2a:3f:11:b4:62:c9 Aug 15 22:28:20 gromit kernel: [ 286.593514] HW CONFIG: channel=11 freq=2462 phymode=3 Aug 15 22:28:20 gromit kernel: [ 286.607980] wlan1: Configured IBSS beacon template based on scan results Aug 15 22:28:40 gromit kernel: [ 306.008510] wmaster0: Adding new IBSS station 00:19:4f:9e:b8:ba (dev=wlan1) Aug 15 22:28:40 gromit kernel: [ 306.008693] wmaster0: Added STA 00:19:4f:9e:b8:ba Aug 15 22:28:40 gromit kernel: [ 306.008742] wlan1: STA 00:19:4f:9e:b8:ba aid 0 enters power save mode Aug 15 22:28:42 gromit kernel: [ 308.022518] wlan1: STA 00:19:4f:9e:b8:ba aid 0 exits power save mode Aug 15 22:28:44 gromit kernel: [ 309.966798] wlan1: STA 00:19:4f:9e:b8:ba aid 0 enters power save mode - 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
