From: Matthew Garrett <mgarrett@chiark.greenend.org.uk>
To: Pavel Machek <pavel@ucw.cz>
Cc: Dave Airlie <airlied@linux.ie>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] reset VGA adapters via BIOS on resume... (non-fbdev/con)
Date: Sat, 23 Jul 2005 01:36:38 +0100 [thread overview]
Message-ID: <E1Dw80M-0001EG-00@chiark.greenend.org.uk> (raw)
In-Reply-To: <20050723003140.GB1988@elf.ucw.cz>
Pavel Machek <pavel@ucw.cz> wrote:
> Unfortunately, if you only get printk() working after you ran
> userspace app... well it makes debugging things like SATA
> "interesting". So I quite like this patch.
Most interesting laptop vendors have at least one model in each range
with a serial port, which makes this sort of thing a bit easier.
> If your BIOS does something wrong, well... your machine crashes.
I think it's hard to define it as "something wrong" - there's no reason
for BIOS authors to support the OS calling BIOS setup code after the
machine has booted. Thinkpads seem to manage this fine, Sonys tend to be
less good at it. Using the VBE mode setting code tends to be more
reliable, and is pretty much guaranteed to be there even after boot.
--
Matthew Garrett | mjg59-chiark.mail.linux-rutgers.kernel@srcf.ucam.org
next prev parent reply other threads:[~2005-07-23 0:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-22 18:52 Dave Airlie
2005-07-22 23:17 ` Matthew Garrett
2005-07-23 0:31 ` Pavel Machek
2005-07-23 0:36 ` Matthew Garrett [this message]
2005-07-23 0:47 ` Pavel Machek
2005-07-23 6:53 ` Stefan Smietanowski
2005-07-24 6:08 ` Keith Owens
2005-07-25 6:39 ` Stefan Seyfried
2005-07-25 7:43 ` Dave Airlie
2005-07-25 7:48 ` Stefan Seyfried
2005-07-23 19:55 ` Alan Cox
2005-07-23 22:37 ` Dave Airlie
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