From: Borislav Petkov <bp@alien8.de>
To: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: ide boot failure 2.6.36/2.6.28 - 2.6.27 works
Date: Sat, 20 Nov 2010 08:45:08 +0100 [thread overview]
Message-ID: <20101120074508.GA16854@liondog.tnic> (raw)
In-Reply-To: <20101120032828.GA14693@iq>
On Sat, Nov 20, 2010 at 04:28:33AM +0100, Andries E. Brouwer wrote:
> Answering myself (and providing info that can be Googled):
>
> > I wanted to boot a recent kernel on an old machine and failed.
> > The last kernel that worked was 2.6.27.
> > What goes wrong is that the disks are no longer detected on 2.6.28.
>
> A typical error would be
>
> Cannot open root device 342 or unknown block (3,66)
>
> Reading the code shows that the default probing is no longer done.
Well, this got changed in 20df429dd6671804999493baf2952f82582869fa since
we had other problems when having ide-generic and a specific PCI IDE
controller driver enabled at the same time, AFAIR.
There are two fixes I can think of - you either enable the specific IDE
controller driver for your chipset or you enforce probing with
ide_generic.probe_mask=0x3f
on the kernel command line.
HTH.
--
Regards/Gruss,
Boris.
next prev parent reply other threads:[~2010-11-20 7:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-20 3:28 Andries E. Brouwer
2010-11-20 7:45 ` Borislav Petkov [this message]
2010-11-20 12:11 ` Andries E. Brouwer
2010-11-20 13:04 ` Alan Cox
2010-11-21 1:29 ` Andries E. Brouwer
-- strict thread matches above, loose matches on Subject: below --
2010-11-20 2:15 Andries E. Brouwer
2010-11-20 2:59 ` Justin P. Mattock
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