Return-path: Received: from mail-oi0-f49.google.com ([209.85.218.49]:34037 "EHLO mail-oi0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753852AbaG2OZx (ORCPT ); Tue, 29 Jul 2014 10:25:53 -0400 Received: by mail-oi0-f49.google.com with SMTP id u20so7368574oif.22 for ; Tue, 29 Jul 2014 07:25:52 -0700 (PDT) Message-ID: <53D7AEF5.5040907@lwfinger.net> (sfid-20140729_162556_949070_5E49BFF1) Date: Tue, 29 Jul 2014 09:25:57 -0500 From: Larry Finger MIME-Version: 1.0 To: Borislav Boev , "linux-wireless@vger.kernel.org" Subject: Re: Poor wifi performance on Intel 7260 Dual-Band AC Wifi card References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On 07/29/2014 02:28 AM, Borislav Boev wrote: > Hello, I am reporting this bug, though it is well known for years. In general I've experienced poor wifi performance with all Intel cards, starting from 3945abg, 4965agn and now Intel 7260 Dual-Band AC. > The old cards were on a ThinkPad T61 system, 7260 is on a brand new ThinkPad Edge E540. > > So here's the problem: > Wireless conection is slow, there's a unusual ping while browsing web pages (tried with all browsers - no luck), and sometimes drop-outs in connection. > There's a partial fix by disabling Wireless "N" mode, but this is irrational, because it limits the network to only 54mbits speed. > > Details about the system: > Hardware: > ThinkPad E540 > CPU: Intel core i5-4200m (Haswell) > Wireless adapter: Intel 7260 Dual-Band AC > > Software: > PCLinuxOS 2014.07 > Kernel: 3.15.5 (though it was the same with old kernels) > Kernel module: iwlwifi You should try the experimental firmware file from https://git.kernel.org/cgit/linux/kernel/git/egrumbach/linux-firmware.git/plain/iwlwifi-7260-9.ucode?h=Core6. I am currently testing it and getting throughput of 60 Mbps on the 2.4 GHz band, and 90 Mbps at 5 GHz. Larry