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From: Daniel Stone <daniel@fooishbar.org>
To: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
	michal@markovi.net,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	sndirsch@suse.com, oneukum@suse.com, tiwai@suse.com,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Max Staudt <mstaudt@suse.de>,
	philm@manjaro.org, bernhard.rosenkranzer@linaro.org
Subject: Re: [RFC PATCH v2 00/13] Kernel based bootsplash
Date: Wed, 20 Dec 2017 11:22:36 +0000
Message-ID: <CAPj87rPvfvYP8WsUuQ4rq58-2qbqCkDztowAMUW7oJa6Bw1TnQ@mail.gmail.com> (raw)
In-Reply-To: <20171220110809.u7bf6miyiorio6bz@linux-x5ow.site>

Hi Johannes,

On 20 December 2017 at 11:08, Johannes Thumshirn <jthumshirn@suse.de> wrote:
> On Tue, Dec 19, 2017 at 05:16:30PM +0100, Daniel Vetter wrote:
>> Ok I've realized that my assumptions about why you need this aren't
>> So from reading these patches it sounded like you want an in-kernel boot
>> splash because that would be on the display faster than a userspace one
>> like plymouth. That's the only reasons I can see for this (if there's
>> another good justification, please bring it up).
>>
>> I only know of very embedded setups (tv top boxes, in vehicle
>> entertainment) where that kind of "time to first image" really matters,
>> and those systems:
>> - have a real hw kms driver
>> - don't have fbcon or fbdev emulation enabled (except for some closed
>>   source stacks that are a bit slow to adapt to the new world, and we
>>   don't care about those in gfx).
>>
>> But from discussions it sounds like you very much want to use this on
>> servers, which makes 0 sense to me. On a server something like plymouth
>> should do a perfectly reasonable job.
>
> For _one_ reason we'd like to see this is (I was one of the requesters of this
> implementation), plymouth in it's infinite wisdom also grabs the serial (IPMI)
> console and escape characters in a screen log are (you can think of the rest
> of this sentence yourself I think).

You can set 'plymouth.ignore-serial-consoles' on your boot line to
disable this behaviour.

> Also plymouth grabs the escape character of HPE iLOs, which is a serious
> no-go.

I'm not entirely sure what this means, but maybe it's best addressed
as a bug report to the Plymouth developers? One of them is in this
thread.

Cheers,
Daniel
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Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-13 19:47 Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 01/13] bootsplash: Initial implementation showing black screen Max Staudt
2017-12-13 23:55   ` Randy Dunlap
2017-12-14 15:37     ` Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 02/13] bootsplash: Add file reading and picture rendering Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 03/13] bootsplash: Flush framebuffer after drawing Max Staudt
2017-12-13 21:35   ` Daniel Vetter
2017-12-14 15:36     ` Max Staudt
2017-12-19 12:23       ` Daniel Vetter
2017-12-19 13:34         ` Max Staudt
2017-12-19 13:57           ` Daniel Vetter
2017-12-19 14:07             ` Oliver Neukum
2017-12-31 12:53               ` Alan Cox
2018-01-03 18:04                 ` Max Staudt
2017-12-19 15:41             ` Max Staudt
2017-12-19 16:02               ` Daniel Vetter
2017-12-19 16:23                 ` Max Staudt
2017-12-20  9:45                   ` Daniel Vetter
2017-12-19 16:09               ` Daniel Vetter
2017-12-19 16:26                 ` Max Staudt
2017-12-19 21:01               ` Ray Strode
2017-12-20 13:14                 ` Max Staudt
2017-12-20 15:35                   ` Ray Strode
2017-12-20 16:52                     ` Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 04/13] bootsplash: Add corner positioning Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 05/13] bootsplash: Add animation support Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 06/13] vt: Redraw bootsplash fully on console_unblank Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 07/13] vt: Add keyboard hook to disable bootsplash Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 08/13] sysrq: Disable bootsplash on SAK Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 09/13] fbcon: Disable bootsplash on oops Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 10/13] Documentation: Add bootsplash main documentation Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 11/13] bootsplash: sysfs entries to load and unload files Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 12/13] tools/bootsplash: Add a basic splash file creation tool Max Staudt
2017-12-13 19:47 ` [RFC PATCH v2 13/13] tools/bootsplash: Add script and data to create sample file Max Staudt
2017-12-13 19:52 ` [RFC PATCH v2 00/13] Kernel based bootsplash Max Staudt
2017-12-19 16:16 ` Daniel Vetter
2017-12-19 17:04   ` Max Staudt
2017-12-19 17:26     ` Daniel Vetter
2017-12-19 18:40       ` Max Staudt
2017-12-20  9:43         ` Daniel Vetter
2017-12-20 10:06           ` Neil Armstrong
2017-12-20 10:14             ` Daniel Vetter
2017-12-20 14:55               ` Max Staudt
2017-12-20 15:11                 ` Daniel Vetter
2017-12-20 15:19                   ` Daniel Vetter
2017-12-20 15:22                     ` Daniel Vetter
2017-12-20 16:23                     ` Max Staudt
2017-12-20 16:15                   ` Max Staudt
2017-12-31 12:44                   ` Alan Cox
2018-01-03 18:00                     ` Max Staudt
2017-12-20 14:16             ` Max Staudt
2017-12-20 14:10           ` Max Staudt
2017-12-31 12:35         ` Alan Cox
2018-01-03 17:56           ` Max Staudt
2017-12-19 20:30     ` Ray Strode
2017-12-20 13:03       ` Max Staudt
2017-12-20 15:21         ` Ray Strode
2017-12-20 16:44           ` Max Staudt
2017-12-21 14:51             ` Ray Strode
2017-12-21 16:32               ` Max Staudt
2017-12-20 11:08   ` Johannes Thumshirn
2017-12-20 11:22     ` Daniel Stone [this message]
2017-12-20 12:48       ` Johannes Thumshirn
2017-12-29 17:13   ` Jani Nikula
2018-01-03 17:38     ` Max Staudt
2017-12-21  9:48 ` Daniel Vetter
2017-12-21 16:52   ` Max Staudt
2017-12-21 15:00 ` Philip Müller

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