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From: Jeff Garzik <jgarzik@pobox.com>
To: John Bradford <john@grabjohn.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Patrick Mochel <mochel@osdl.org>,
	Grover Andrew <andrew.grover@intel.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Subtle semantic issue with sleep callbacks in drivers
Date: Thu, 17 Apr 2003 11:09:26 -0400	[thread overview]
Message-ID: <20030417150926.GA25402@gtf.org> (raw)
In-Reply-To: <200304171509.h3HF9PS1000278@81-2-122-30.bradfords.org.uk>

On Thu, Apr 17, 2003 at 04:09:25PM +0100, John Bradford wrote:
> > The video BIOS on a card often contains information that is found
> > -nowhere- else.  Not in the chip docs.  Not in a device driver.
> > Such information can and does vary from board-to-board, such as RAM
> > timings, while the chip remains unchanged.
> 
> Incidently, what happens if we:
> 
> * Suspend
> * Swap VGA card with another one
> * Restore

When it breaks, you get to keep both pieces.

That's a "Don't Do That" issue for any hardware between suspend
and resume.

	Jeff




  reply	other threads:[~2003-04-17 14:57 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-14 21:09 Subtle semantic issue with sleep callbacks in drivers Grover, Andrew
2003-04-16 18:39 ` Patrick Mochel
2003-04-16 19:36   ` Benjamin Herrenschmidt
2003-04-17 13:35   ` Alan Cox
2003-04-17 14:48     ` Jeff Garzik
2003-04-17 15:09       ` John Bradford
2003-04-17 15:09         ` Jeff Garzik [this message]
2003-04-17 15:47           ` John Bradford
2003-04-17 15:56             ` Jeff Garzik
2003-04-17 16:24               ` Alan Cox
2003-04-18  7:37             ` Greg KH
2003-04-18  7:51               ` John Bradford
2003-04-18  9:10               ` Russell King
2003-04-18 11:18                 ` Alan Cox
2003-04-18 11:30               ` Alan Cox
2003-04-29  8:28         ` Pavel Machek
2003-04-17 14:59     ` John Bradford
2003-04-17 15:04       ` Alan Cox
  -- strict thread matches above, loose matches on Subject: below --
2003-04-14 19:07 Grover, Andrew
2003-04-14 19:18 ` Benjamin Herrenschmidt
2003-04-14 19:56 ` Alan Cox
2003-04-23 15:34 ` Pavel Machek
2003-04-14 17:09 Grover, Andrew
2003-04-14 17:40 ` Benjamin Herrenschmidt
2003-04-23 15:29 ` Pavel Machek
2003-04-14 10:00 Benjamin Herrenschmidt
2003-04-14 10:11 ` Benjamin Herrenschmidt
2003-04-16 18:31 ` Patrick Mochel
2003-04-16 19:29   ` Benjamin Herrenschmidt
2003-04-23 15:32 ` Pavel Machek

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