Return-path: Received: from zimbra.real-time.com ([63.170.91.9]:48181 "EHLO zimbra.real-time.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752368AbbFNXFT (ORCPT ); Sun, 14 Jun 2015 19:05:19 -0400 Date: Mon, 15 Jun 2015 09:04:56 +1000 From: James Cameron To: Larry Finger Cc: Arnaud LE CAM , Jes Sorensen , linux-wireless Subject: Re: [Bug ?] 10ec:b723 Realtek RTL8723BE wireless card drops connection Message-ID: <20150614230456.GE12739@us.netrek.org> (sfid-20150615_010530_133040_28AC9428) References: <1434268591.3014.YahooMailBasic@web172003.mail.ir2.yahoo.com> <557D9966.5050209@lwfinger.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <557D9966.5050209@lwfinger.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sun, Jun 14, 2015 at 10:10:30AM -0500, Larry Finger wrote: > To address your problem, power saving does not work correctly on > this device. That is why there are numerous posts on the web telling > people to use ips=0. It seems that Ubuntu people never look at > anything but the Ubuntu literature; however, I'm sure that I posted > this "suggestion" there as well. The Realtek group is currently > rewriting the entire dynamic management code for all their drivers. > When complete, this should improve performance and should help the > power-save condition. No, I do not know when the new code will be > ready, or how much improvement it will make. Thanks for summary. OLPC is also seeing the issue. Power saving mode impacts battery run time; one of our design goals. ips=0 seems to solve with 3.19, but not fully with 4.1-rc7; still some periods of packet loss. I offer to test any rtl8723be changes. (I'm also looking into IBSS, because Sugar desktop relies on ad-hoc. No beacons on creating an IBSS through NetworkManager, but beacons are fine with "iw dev wlan0 ibss join x 2437". But I'm not yet ready to report problem; still some debugging to do.) -- James Cameron http://quozl.linux.org.au/