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From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	Shreyas Joshi <shreyas.joshi@biamp.com>,
	rostedt@goodmis.org, shreyasjoshi15@gmail.com,
	linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] printk: handle blank console arguments passed in.
Date: Wed, 7 Oct 2020 01:08:21 +0900	[thread overview]
Message-ID: <20201006160821.GA430@jagdpanzerIV.localdomain> (raw)
In-Reply-To: <7d512002-e33c-198f-52df-a89a30bc665b@roeck-us.net>

On (20/10/06 07:22), Guenter Roeck wrote:
> On 10/6/20 6:33 AM, Sergey Senozhatsky wrote:
> > On (20/10/06 11:54), Petr Mladek wrote:
> >> On Tue 2020-10-06 15:59:07, Sergey Senozhatsky wrote:
> >>> On (20/10/05 20:35), Guenter Roeck wrote:
> >>>> On a side note, I don't see the problem presumably fixed with this
> >>>> patch in any of my tests.
> >>>
> >>> Hmm. This is rather interesting. Empty console= certainly oops-es my laptop,
> >>
> >> Just by chance. Do you have any log with the Oops? Or does it die
> >> silently?
> > 
> > The laptop in question has fbdev and no serial. It dies with blank screen.
> > I'll try to dig it and get some backtrace or anything useful.
> > 
> 
> Some versions of systemd (and possibly other distributions) apparently
> react allergic if no console is present. See [1]. Maybe that is what
> happens with your laptop ?

Seems to be crashing before /init

> That exchange leads to the question what should be done with /dev/console
> if there is no console. On Chromebooks we see an error when trying
> to open it if I recall correctly.

A wild guess:

Devices that you test, do they have 'blah blah  console=  blah blah'
command line? If so, does anything change if you revert the patch in
question and change kernel boot command line to 'blah blah console='?

	-ss

  reply	other threads:[~2020-10-06 16:08 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-09  5:29 [PATCH] printk: handle blank console arguments passed in Shreyas Joshi
2020-03-17  1:34 ` Shreyas Joshi
2020-03-17  1:39   ` Steven Rostedt
2020-03-17  2:01     ` Sergey Senozhatsky
2020-03-17  2:17       ` Shreyas Joshi
2020-03-17  8:22         ` Sergey Senozhatsky
2020-05-22  6:46   ` Shreyas Joshi
2020-05-22  6:53   ` Shreyas Joshi
2020-05-22 10:00     ` Petr Mladek
2020-10-06  2:59       ` Sergey Senozhatsky
2020-10-06  3:35         ` Guenter Roeck
2020-10-06  5:08           ` Greg Kroah-Hartman
2020-10-06 11:17             ` Guenter Roeck
2020-10-06  6:59           ` Sergey Senozhatsky
2020-10-06  9:54             ` Petr Mladek
2020-10-06 13:33               ` Sergey Senozhatsky
2020-10-06 14:22                 ` Guenter Roeck
2020-10-06 16:08                   ` Sergey Senozhatsky [this message]
2020-10-06  9:52           ` Petr Mladek
2020-10-06 10:45             ` Guenter Roeck
2020-10-06 13:43               ` Petr Mladek
2020-10-06 16:35                 ` Petr Mladek
2020-10-06 17:15                   ` Sergey Senozhatsky
2020-10-07  7:28                     ` Petr Mladek
2020-10-07 12:30                       ` Sergey Senozhatsky
2020-10-07 14:39                         ` Sergey Senozhatsky
2020-10-07 15:57                         ` Guenter Roeck
2020-10-07 16:29                           ` Sergey Senozhatsky
2020-10-08  5:52                             ` Sergey Senozhatsky
2020-10-08  9:01                               ` Petr Mladek
2020-10-08 10:56                                 ` Sergey Senozhatsky
2020-10-08 12:05                                 ` Sergey Senozhatsky
2020-10-22 11:38                               ` Petr Mladek
2020-10-22 13:32                                 ` Sergey Senozhatsky
2020-10-08  8:50                         ` Petr Mladek
2020-10-08 12:20                           ` Sergey Senozhatsky
2020-10-08 12:37                             ` Sergey Senozhatsky
2020-05-15 15:24 ` Petr Mladek
2020-05-20 11:50   ` Sergey Senozhatsky
2020-05-22  6:40     ` Shreyas Joshi

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