linux-kernel - RE: dell-smbios makes wireless card unusable on Dell XPS 13 9360

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Date:   Tue, 6 Feb 2018 15:58:23 +0000
From:   <Mario.Limonciello@...l.com>
To:     <pmenzel+platform-driver-x86@...gen.mpg.de>,
        <pali.rohar@...il.com>, <it+platform-driver-x86@...gen.mpg.de>
CC:     <platform-driver-x86@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: RE: dell-smbios makes wireless card unusable on Dell XPS 13 9360

Hi Paul,

> -----Original Message-----
> From: Paul Menzel [mailto:pmenzel+platform-driver-x86@...gen.mpg.de]
> Sent: Tuesday, February 6, 2018 9:50 AM
> To: Pali Rohár <pali.rohar@...il.com>; Limonciello, Mario
> <Mario_Limonciello@...l.com>; it+platform-driver-x86@...gen.mpg.de
> Cc: platform-driver-x86@...r.kernel.org; Linux Kernel Mailing List <linux-
> kernel@...r.kernel.org>
> Subject: dell-smbios makes wireless card unusable on Dell XPS 13 9360
> 
> Dear Linux folks,
> 
> 
> 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?

If it's specific to 4.15, I've got a few steps I'd like you to try to better
characterize.

1) can you please apply https://patchwork.kernel.org/patch/10194287/
and let us know if it helps?

2) If you blacklist dell-smbios-wmi does it help?

Thanks,