linux-kernel - RE: Question regarding power button of Dell XPS13

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Message-ID: <1AE640813FDE7649BE1B193DEA596E886CE1EC3D@SHSMSX101.ccr.corp.intel.com>
Date:   Wed, 28 Dec 2016 07:07:06 +0000
From:   "Zheng, Lv" <lv.zheng@...el.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Brown, Len" <len.brown@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: Question regarding power button of Dell XPS13

Hi, Paul

> From: Paul Menzel [mailto:pmenzel@...gen.mpg.de]
> Subject: Question regarding power button of Dell XPS13
> 
> Dear Linus, dear Len,
> 
> 
> I heard that you both have a Dell XPS13. I got the “revision” 9360, and
> installed Debian Stretch/testing on it with Linux 4.8.15 and Linux 4.9-rc8.
> 
> When pressing the power button the GNOME dialog, asking what to do
> (restart, power off, …) doesn’t appear.
> 
> Neither `xev` nor `acpi_listen` show something, so I submitted ticket
> #190871 [1], and Lv already looked at it.
> 
> Just to make sure, that it is really a Linux problem, does the power
> button work for you?

I'm not sure if there is no bug in drivers/acpi/button.c.
At least this driver never handles 0x02 sleep/power button notifications.
Just because there is no SCI routed to the drivers after a wakeup.

And we have quirks related to the freeze mode for 0x80 sleep/power button notifications.

I don't know if the above potential issues can cause real problems.

> 
> 
> Kind regards,
> 
> Paul
> 
> 
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=190871

Yes.
We are debugging it there.

Thanks
Lv

> [2]
> http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.4.0-57.78/changelog