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From:   Stephen Berman <stephen.berman@gmx.net>
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        linux-kernel@vger.kernel.org
Subject: Re: power-off delay/hang due to commit 6d25be57 (mainline)
References: <87bln7ves7.fsf@gmx.net>
        <20200506215713.qoo4enq32ckcjmz7@linutronix.de>
        <87v9l65d2y.fsf@gmx.net>
        <20200513220428.4nksinis2qs5dtmh@linutronix.de>
        <87mu6aurfn.fsf@gmx.net>
        <20200522164012.ynyvrjompv42jtmx@linutronix.de>
        <87y2owwo2o.fsf@rub.de>
Date:   Tue, 09 Jun 2020 23:26:58 +0200
In-Reply-To: <87y2owwo2o.fsf@rub.de> (Stephen Berman's message of "Tue, 09 Jun
        2020 12:06:23 +0200")
Message-ID: <87img0kk0t.fsf@gmx.net>
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On Tue, 09 Jun 2020 12:06:23 +0200 Stephen Berman <stephen.berman@gmx.net> wrote:

> Do you still want me to check whether removing the iwlwifi driver makes
> a differece?  And with the CDROM still detached, or does that not
> matter?

I'm not actually sure just what you mean by removing the wifi driver,
but I just now tried moving the iwlwifi firmware out of /lib/firmware,
then booted 5.6.4 as before (with "ignore_loglevel initcall_debug" and
with the CDROM still detached), and of course there was now no wireless
interface.  I started X, Emacs, Firefox (of course with no internet),
VLC, used them a bit then closed them all, then called `shutdown -h now'
and the message output was essentially identical to what I posted
previously (but of course without "iwlwifi 0000:02:00.0: shutdown") and
the machine did not power off.  So if this was the test of removing the
wifi driver, then it made no difference.

Steve Berman