Return-path: Received: from mail-qc0-f177.google.com ([209.85.216.177]:34283 "EHLO mail-qc0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752783AbbESQpM (ORCPT ); Tue, 19 May 2015 12:45:12 -0400 Received: by qctt3 with SMTP id t3so10181622qct.1 for ; Tue, 19 May 2015 09:45:11 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: From: darklight wu Date: Wed, 20 May 2015 00:44:51 +0800 Message-ID: (sfid-20150519_184518_431520_369ABA36) Subject: Re: Failed to capture data packets using Monitor mode with Intel 7260 card. (Under Ubuntu 14.04) To: Emmanuel Grumbach Cc: linux-wireless Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, May 18, 2015 at 3:26 PM, Emmanuel Grumbach wrote: > On Mon, May 18, 2015 at 10:01 AM, darklight wu wrote: >> Hi, All: >> >> I configured the Wifi Monitor mode with Intel 7260 card under >> Ubuntu14.04 and then used Wireshark to capture packets from air. But I >> could only get management/control packets but no data packets. I tried >> different channels and also with HT20 or HT40+/-. >> >> The commands I used were: >> >> iw dev wlan0 interface add mon0 type monitor >> iw dev wlan0 del //I googled and was told I needed to delete the >> wlan0 first. Or else I got device busy (-16) error >> ifconfig mon0 up >> iw dev mon0 set channel 1 >> >> I also tried to use other ways like "airmon-ng start wlan0". All the >> observations were same, no data packets. It's weird! Anyone has a >> clue? >> > > This is weird. But I recommend to add power_scheme=1 as a module > parameter to iwlmvm. Since iwlmvm is loaded automatically, you'll need > to add that to /etc/modprobe.d/iwlwifi.conf. > 14.04 ships 3.13 and I remember we had issues with monitor mode at > that time. You may want to try a newer kernel. I tried again today with "power_scheme=1" and also booted with Ubuntu 15.04. Both still failed to work in monitor mode. And with Ubuntu 15.04, I event could not configure the nic to work on monitor mode. The same commands at least can set the monitor mode under 14.04. Meanwhile, I just want to clarify, the nic could capture data packets to/from itself but could not capture others that were not belongs to it. My co-worker tried on another machine with Ubuntu 14.04, he was also failed. Any tricks here?