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From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: David Fries <david@fries.net>,
	linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
	Pavel Machek <pavel@ucw.cz>, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] i486 CR4 oops, no_console_suspend
Date: Tue, 19 Aug 2008 09:07:26 -0700	[thread overview]
Message-ID: <48AAEFBE.5060406@zytor.com> (raw)
In-Reply-To: <20080819093454.GG28713@elte.hu>

Ingo Molnar wrote:
> 
> i've had trouble no end with getting even kernel messages out to the 
> serial console during critical phases of suspend/resume. (especially in 
> combination with earlyprintk=ttyS0 - not surprisingly)
> 
> Especially during resume the UART is initialized back to something 
> really slow - 300 bauds or 9600 bauds. (depends on the chipset i guess) 
> So even though it works, it will only worked reliably when i 
> standardized all my baud settings to that very low setting.
> 

Probably depends on the BIOS, actually; I suspect you end up with the 
standard BIOS setting, which is *usually* 9600 bps.

	-hpa

  reply	other threads:[~2008-08-19 16:11 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-18  4:03 [PATCH] Fix i486 suspend to disk CR4 oops David Fries
2008-08-18  4:14 ` Maciej W. Rozycki
2008-08-18  4:35   ` H. Peter Anvin
2008-08-18  6:04     ` Andi Kleen
2008-08-18  6:34       ` H. Peter Anvin
2008-08-18  6:42         ` Andi Kleen
2008-08-18  6:41 ` Ingo Molnar
2008-08-18  6:45   ` H. Peter Anvin
2008-08-18  9:15   ` Pavel Machek
2008-08-18 10:16   ` Rafael J. Wysocki
2008-08-18 12:58   ` David Fries
2008-08-18 13:25     ` Ingo Molnar
2008-08-18 14:41       ` Maciej W. Rozycki
2008-08-18 14:38     ` Maciej W. Rozycki
2008-08-18 22:04     ` Pavel Machek
2008-08-18 22:10       ` H. Peter Anvin
2008-08-18 15:24   ` Dave Jones
2008-08-18 16:04     ` Lennart Sorensen
2008-08-18 17:17       ` Dave Jones
2008-08-18 17:32     ` H. Peter Anvin
2008-08-18 22:02       ` Pavel Machek
2008-08-19  3:37   ` [PATCH] i486 CR4 oops, no_console_suspend David Fries
2008-08-19  9:34     ` Ingo Molnar
2008-08-19 16:07       ` H. Peter Anvin [this message]
2008-08-21  4:17         ` David Fries
2008-08-21  5:37           ` H. Peter Anvin

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