>>>>>>> Every now and then, my connection drops out. From wireshark on the >>>>>>> station, it looks like traffic from the AP to the STA is coming >>>>>>> through but traffic from the STA to the AP is not. I could be wrong >>>>>>> here, though. Nothing is logged in either machine's kernel log. >>>>>>> After 5 seconds to a couple minutes, everything starts working again. >>>>>>> >>>>>>> A couple of Apple devices using the same radio on the same AP seem to work fine. >>>>>>> >>>>>>> Any advice for debugging this? I don't know where to start. >>>>>> >>>>>> I caught one of the stalls with iwlwifi debugging on. I've attached >>>>>> the dmesg. The stall ended ten seconds or so before the end of this >>>>>> trace. Is this an indication that something's wrong with iwlwifi? >>>>>> >>>>>> [151258.096091] iwlwifi 0000:03:00.0: U iwlagn_good_plcp_health plcp health thre >>>>>> shold 50 delta 96 msecs 103 >>>>>> [151258.096095] iwlwifi 0000:03:00.0: U iwl_force_rf_reset perform radio reset. >>>>>> >>>>> Can you please disable powersave? >>>>> It seems that it should be disabled by default, but you enabled it? >>>>> I might be confused though... Looking again at the code... >>>> >>>> This? >>>> >>>> $ cat /sys/module/iwlwifi/parameters/power_save >>>> N >>>> >>>> I have pcie_aspm.policy=powersave, but I don't think that should >>>> matter. Or am I missing something? >>> >>> That should be ok. >> >> Does this help? >> >> diff --git a/drivers/net/wireless/iwlwifi/dvm/power.c >> b/drivers/net/wireless/iwlwifi/dvm/power.c >> index f2c1439..e5a6b70 100644 >> --- a/drivers/net/wireless/iwlwifi/dvm/power.c >> +++ b/drivers/net/wireless/iwlwifi/dvm/power.c >> @@ -288,6 +288,9 @@ static void iwl_power_build_cmd(struct iwl_priv *priv, >> bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS; >> int dtimper; >> >> + iwl_power_sleep_cam_cmd(priv, cmd); >> + return; >> + >> dtimper = priv->hw->conf.ps_dtim_period ?: 1; >> >> if (priv->wowlan) > > This patch has survived for about 15 minutes on 3.15-rc. It certainly > has some effect: pinging from the AP to the STA now takes a consistent > ~3.8ms instead of taking varying amounts of time between 5 and 200 ms > or so. > > I wonder if this is something 802.11n/802.11ac-specific? I remember > having all kinds of problems with 802.11n on this laptop that were > resolved by turning off 11n or turning off power saving. > well... my patch really turns off power saving. The hard way. But since you are having issues - I guess I'll post it and disable power save for these devices. Note that today most of the power save features are disabled anyway. -- 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
