Messages in this thread | | | Subject | Re: dell-smbios makes wireless card unusable on Dell XPS 13 9360 | From | Paul Menzel <> | Date | Thu, 8 Feb 2018 07:36:35 +0100 |
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Dear Mario,
Am 08.02.2018 um 05:57 schrieb Mario.Limonciello@dell.com: >> -----Original Message----- >> From: Paul Menzel [mailto:pmenzel+platform-driver-x86@molgen.mpg.de] >> Sent: Wednesday, February 7, 2018 3:41 AM >> To: Limonciello, Mario <Mario_Limonciello@Dell.com> >> Cc: Pali Rohár <pali.rohar@gmail.com>; it+platform-driver-x86@molgen.mpg.de; >> platform-driver-x86@vger.kernel.org; linux-kernel@vger.kernel.org >> Subject: Re: dell-smbios makes wireless card unusable on Dell XPS 13 9360
>> On 02/06/18 20:51, Mario.Limonciello@dell.com wrote: >>>> -----Original Message----- >>>> From: platform-driver-x86-owner@vger.kernel.org [mailto:platform-driver-x86- >>>> owner@vger.kernel.org] On Behalf Of Paul Menzel >>>> Sent: Tuesday, February 6, 2018 10:08 AM >>>> To: Limonciello, Mario <Mario_Limonciello@Dell.com> >>>> Cc: Pali Rohár <pali.rohar@gmail.com>; it+platform-driver-x86@molgen.mpg.de; >>>> platform-driver-x86@vger.kernel.org; linux-kernel@vger.kernel.org >>>> Subject: Re: dell-smbios makes wireless card unusable on Dell XPS 13 9360 >> >>>> On 02/06/18 16:58, Mario.Limonciello@dell.com wrote: >>>> >>>>>> -----Original Message----- >>>>>> From: Paul Menzel [mailto:pmenzel+platform-driver-x86@molgen.mpg.de] >>>>>> Sent: Tuesday, February 6, 2018 9:50 AM >>>>>> To: Pali Rohár <pali.rohar@gmail.com>; Limonciello, Mario >>>>>> <Mario_Limonciello@Dell.com>; it+platform-driver-x86@molgen.mpg.de >>>>>> Cc: platform-driver-x86@vger.kernel.org; Linux Kernel Mailing List <linux- >>>>>> kernel@vger.kernel.org> >>>>>> Subject: dell-smbios makes wireless card unusable on Dell XPS 13 9360 >>>> >>>>>> Adding `dell-smbios` to `/etc/modules` on the Dell XPS 13 9360, it seems >>>>>> to badly effect the Wireless LAN device, causing it to be absent or to >>>>>> not work. >>>>>> >>>>>> In one case, the whole system lagged, that means, the log in screen >>>>>> stayed grayed out for 15 seconds, and the mouse pointer stopped moving >>>>>> every 20(?) seconds for some seconds. >>>>> >>>>> Can you please confirm if you're indicating this is a regression in 4.15? >>>>> Or was this present in earlier kernels too? >>>> >>>> Yes, it happened with Ubuntu’s 4.13 too. My original message had one log >>>> attached where the Wifi wasn’t visible at all. >>> >>> Looking at that log it looks to me that the ath10k firmware crashed, not that >>> dell-smbios lagging caused the crash. >>> >>> [ 15.262226] ath10k_pci 0000:3a:00.0: firmware crashed! (uuid a6c40788-b7ad-4f6a-890a-62e62c1f6e5f) >>> [ 15.262233] ath10k_pci 0000:3a:00.0: qca6174 hw3.2 target 0x05030000chip_id 0x00340aff sub 1a56:1535 >>> [ 15.262235] ath10k_pci 0000:3a:00.0: kconfig debug 0 debugfs 1 tracing 1 dfs 0 testmode 0 >>> [ 15.262645] ath10k_pci 0000:3a:00.0: firmware ver WLAN.RM.4.4-00022-QCARMSWPZ-2 api 6 features wowlan,ignore-otp crc32 4d458559 >>> [ 15.262941] ath10k_pci 0000:3a:00.0: board_file api 2 bmi_id N/A crc32 0e26ef70 >>> [ 15.262943] ath10k_pci 0000:3a:00.0: htt-ver 0.0 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1 >>> [ 15.274887] ath10k_pci 0000:3a:00.0: failed to get memcpy hi address for firmware address 4: -16 >>> [ 15.274900] ath10k_pci 0000:3a:00.0: failed to read firmware dump area: -16 >>> [ 15.274909] ath10k_pci 0000:3a:00.0: Copy Engine register dump: >>> >>> Do you have a strong correlation with dell-smbios loading and the wireless >>> firmware crashing? You're the first account I've heard of this. >> >> Yes, the correlation is very strong. > > In this situation you've described, can you unload ath10k and reload to recover?
No, I unloaded ath10k_pci, and that takes a few seconds, and also shows the Linux error messages in the log. Loading it again, there are also Linux error messages, and the wireless does *not* work again.
>>> Also why are you putting it in /etc/modules rather than letting the udev >>> rules load from modaliases? Or did you artificially prevent that in some way? >> >> No idea, with Ubuntu 17.10 there are log messages, that the module is >> not loaded. So I thought adding it to `/etc/modules` will fix it. Should >> the module smbios-dell be supported out of the box on Ubuntu 17.10? > > It's only supposed to load when it's needed by another kernel module such as > dell-laptop or dell-wmi. > > I suppose the messages you were seeing were related to the backends to > dell-smbios (dell-smbios-wmi or dell-smbios-smm) not yet being initialized > when a driver had requested to use an SMBIOS method. > > If you don't add it to /etc/modules I would expect that you'll find it's actually > already loaded by the system when boot has completed.
Yes, it looks like it gets loaded after I removed it from `/etc/modules`.
Still, that behavior should not happen. Could you reproduce it? Is it actually a ath10k_pci bug, and their maintainers should be added?
Kind regards,
Paul
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