From mboxrd@z Thu Jan 1 00:00:00 1970 From: Till Wollenberg Date: Thu, 11 Dec 2014 19:19:22 +0100 Subject: [ath9k-devel] Chip glitch for RSSI value ? In-Reply-To: <20141211171426.4dd8f20a@fusen> References: <20141211171426.4dd8f20a@fusen> Message-ID: <5489E02A.9090908@uni-rostock.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org Hi! * On 11.12.2014, 17:14 Christophe Pr?votaux wrote: > Sometimes it seems the ath9k series chips (at least some of them ) do not report RSSI for some frames, is this a known chip glitch ? I don't know if it is a chip glitch, but I can confirm the observation. I have a dataset of 2.05 billion frames received with AR9280 cards in monitor mode. I used ath9k from OpenWRT 12.09 (kernel 3.3.8). Out of these frames, about 2% do not carry signal/noise information. Also, for about 0.4% of all frames a signal level of 0dBm or above is reported, which is unlikely to be correct. Best regards Till -- Dipl.-Inf. Till Wollenberg University of Rostock, Faculty of CS and EE Institute of Computer Science 18055 Rostock, Germany Tel.: +49 (0)381 498-7507