Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755734AbdDPKYG (ORCPT ); Sun, 16 Apr 2017 06:24:06 -0400 Received: from mail-io0-f170.google.com ([209.85.223.170]:35912 "EHLO mail-io0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752958AbdDPKYC (ORCPT ); Sun, 16 Apr 2017 06:24:02 -0400 MIME-Version: 1.0 In-Reply-To: <9e48930c-4822-5af4-2ebb-4d2dcd12d448@lwfinger.net> References: <9e48930c-4822-5af4-2ebb-4d2dcd12d448@lwfinger.net> From: rupert THURNER Date: Sun, 16 Apr 2017 12:23:41 +0200 Message-ID: Subject: Re: 4.10.9 nok with realtek wlan, atom To: Larry Finger Cc: Bjorn Helgaas , linux-pci@vger.kernel.org, Chaoming Li , Kalle Valo , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3654 Lines: 97 On Sat, Apr 15, 2017 at 10:40 PM, Larry Finger wrote: > On 04/14/2017 03:26 PM, rupert THURNER wrote: >> >> On Thu, Feb 9, 2017 at 9:09 PM, Larry Finger >> wrote: >>> >>> On 02/09/2017 01:43 PM, Bjorn Helgaas wrote: >>>> >>>> >>>> [+cc rtl8192ce folks in case they've seen this] >>>> >>>> On Thu, Feb 09, 2017 at 03:45:01PM +0100, rupert THURNER wrote: >>>>> >>>>> >>>>> hi, >>>>> >>>>> not technical expert enough, i just wanted to give a short user >>>>> feedback. for realtek wlan on atom, kernels up to 4.9.5 are ok, and >>>>> kernel 4.10.0-rc7-g926af6273fc6 (arch linux-git version numbering) as >>>>> well. kernels 4.9.6, 4.9.7, and 4.9.8 fail, i.e. connection to a WLAN >>>>> hotspot is possible then drops, or connecting to wlan fails >>>>> alltogether. >>>> >>>> >>>> >>>> Thanks very much for your report, and sorry for the inconvenience. >>>> >>>> v4.10-rc7 works, so I guess we don't need to worry about fixing v4.10. >>>> >>>> But the stable kernels v4.9.6, v4.9.7, and v4.9.8 are broken, so we >>>> need to figure out why and make sure we fix the v4.9 stable series. >>>> >>>> I can't tell yet whether this is PCI-related or not. If it is, >>>> 4922a6a5cfa7 ("PCI: Enumerate switches below PCI-to-PCIe bridges") >>>> appeared in v4.9.6, and there is a known issue with that. The issue >>>> should be fixed by 610c2b7ff8f6 ("PCI/ASPM: Handle PCI-to-PCIe bridges >>>> as roots of PCIe hierarchies"), which appeared in v4.9.9, so I guess >>>> the first thing to do would be to test v4.9.9. >>>> >>>> If it's not fixed in v4.9.9, can you share the complete dmesg log >>>> (output of "dmesg" command) and "lspci -vv" output for v4.9.5 (last >>>> known working version) and v4.9.6 (first known broken version)? On >>>> v4.9.6, collect the dmesg output after the failure occurs. >>>> >>>>> 24: PCI 300.0: 0282 WLAN controller >>>>> [Created at pci.366] >>>>> Model: "Realtek RTL8188CE 802.11b/g/n WiFi Adapter" >>>>> Device: pci 0x8176 "RTL8188CE 802.11b/g/n WiFi Adapter" >>>>> Revision: 0x01 >>>>> Driver: "rtl8192ce" >>>>> Driver Modules: "rtl8192ce" >>>>> Device File: wlp3s0 >>>>> Features: WLAN >>> >>> >>> >>> It would be helpful if someone were to bisect this issue. The only issue >>> that comes to mind was fixed in commit 52f5631a4c05 ("rtlwifi: rtl8192ce: >>> Fix loading of incorrect firmware") which is in 4.10-rc7 and will be >>> backported to 4.9. >>> >>> The above issue is one that could not be reproduced on my hardware, thus >>> it >>> took Jurij Smakov to find the fix. Without his bisection of the problem, >>> who >>> knows how long it would have taken to find my edit mistake. >> >> >> larry, using the newest kernel 4.10.8 the network connection dropps >> again irregular. >> >> # dmesg >> [ 0.000000] Linux version 4.10.9-1-ARCH (builduser@tobias) (gcc >> version 6.3.1 20170306 (GCC) ) #1 SMP PREEMPT Sat Apr 8 12:39:59 CEST >> 2017 >> [ 11.933373] rtl8192ce: rtl8192ce: Power Save off (module option) >> [ 11.933396] rtl8192ce: Using firmware rtlwifi/rtl8192cfw.bin >> [ 11.978307] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' >> [ 11.978945] rtlwifi: rtlwifi: wireless switch is on >> >> # lspci -vv >> Subsystem: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi >> Adapter >> Kernel driver in use: rtl8192ce > > > Is firmware rtlwifi/rtl8192cfw.bin also used on kernels that work? 4.10.x used to work. 4.10.6 or 4.10.7 it started failing? i am not too sure about it. # ls -l /usr/lib/firmware/rtlwifi/rtl8192cfw.bin -rw-r--r-- 1 root root 16192 Mar 10 12:15 /usr/lib/firmware/rtlwifi/rtl8192cfw.bin rupert