From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FC04C3A59F for ; Thu, 29 Aug 2019 10:03:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1041D23405 for ; Thu, 29 Aug 2019 10:03:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727085AbfH2KDl (ORCPT ); Thu, 29 Aug 2019 06:03:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57720 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727026AbfH2KDl (ORCPT ); Thu, 29 Aug 2019 06:03:41 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EE0E4106E289; Thu, 29 Aug 2019 10:03:40 +0000 (UTC) Received: from localhost (unknown [10.43.2.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4C72660C05; Thu, 29 Aug 2019 10:03:40 +0000 (UTC) Date: Thu, 29 Aug 2019 12:03:37 +0200 From: Stanislaw Gruszka To: Sergey Maranchuk Cc: linux-wireless@vger.kernel.org Subject: Re: rt2x00: 5Ghz signal power degradation with linux 5.2 kernel Message-ID: <20190829100336.GA1930@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.64]); Thu, 29 Aug 2019 10:03:41 +0000 (UTC) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On Thu, Aug 29, 2019 at 12:42:44PM +0300, Sergey Maranchuk wrote: > I got some problem after upgrade kernel to 5.2 version (debian testing > linux-image-5.2.0-2-amd64). 5Ghz client stopped to see AP. > Some tests with 1metre distance between client-AP: 2.4Ghz -22dBm, for > 5Ghz - 53dBm !, for longer distance (8m + walls) 2.4 - 61dBm, 5Ghz not > visible. > All works fine with kernel 4.19 and on windows 10, other devices also > see AP without any problems with same distance. After looking on the changlog most possible cause of it seems to be commit 9ad3b55654455258a9463384edb40077439d879f: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9ad3b55654455258a9463384edb40077439d879f Please try to revert it, and see if that improve rx signal level. It that would not help, please try to narrow regression to two consecutive kernel versions - it is: 4.19 -> 5.0 or 5.0 -> 5.1 or 5.1 -> 5.2 ? Stanislaw