Return-path: Received: from mail-io0-f175.google.com ([209.85.223.175]:33940 "EHLO mail-io0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756567AbdDPSJf (ORCPT ); Sun, 16 Apr 2017 14:09:35 -0400 MIME-Version: 1.0 In-Reply-To: <40bc6004-519c-7bf1-874b-3ae169140637@lwfinger.net> References: <9e48930c-4822-5af4-2ebb-4d2dcd12d448@lwfinger.net> <40bc6004-519c-7bf1-874b-3ae169140637@lwfinger.net> From: rupert THURNER Date: Sun, 16 Apr 2017 20:09:13 +0200 Message-ID: (sfid-20170416_201021_603826_C40AA55A) 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-wireless-owner@vger.kernel.org List-ID: On Sun, Apr 16, 2017 at 6:02 PM, Larry Finger wrote: > On 04/16/2017 05:23 AM, rupert THURNER wrote: >> >> 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 > > > That does not answer my question. 4.10, 4.10.2, 4.10.3, 4.10.5 worked. as far as i can tell rtl8192cfw.bin did not change and was used. with kernels 4.9 there was a phase where rtl8192cfwU.bin was loaded which did not work. or i do not understand your question correctly?