Bug#878332: linux-armmp-lpae: Raspberry pi 2 hangs at boot

From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#878332: linux-armmp-lpae: Raspberry pi 2 hangs at boot
Date	2017-10-14 00:30 +0200
Message-ID	<uAgCR-18P-1@gated-at.bofh.it> (permalink)
References	(1 earlier) <uA6ka-3bV-11@gated-at.bofh.it> <uzTZH-34a-129@gated-at.bofh.it> <uA82B-4hy-1@gated-at.bofh.it> <uzTZH-34a-129@gated-at.bofh.it> <uA82B-4hy-1@gated-at.bofh.it>
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Cross-posted to 2 groups.

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On Fri, 2017-10-13 at 15:05 +0200, Sebastian Reichel wrote:
> Hi,
> 
> On Fri, 13 Oct 2017 13:24:38 +0200 Philip Rinn <rinni@inventati.org> wrote:
> > just to make it clear: Version 4.11.6 is the last working kernel
> > for me.
> 
> 4.12 introduced a new mmc driver, that was not enabled in the
> Debian kernel resulting in rootfs not being found. It has been
> enabled in 4.13.4-1, which is available in sid:
> 
> [armhf,arm64] mmc: Enable MMC_BCM2835 (Closes: #845422)
> 
> Also your kernel cmdline is probably incorrect for early
> printing, which works with the Debian kernel on RPi2 (and
> properly displayed the rootfs could not be found problem
> for 4.12 kernels):
> 
> earlyprintk console=ttyAMA0,115200 root=/dev/mmcblk0p2 rootwait

Note that 'earlyprintk' doesn't (and can't) work on distribution
kernels for ARM because there is too much variation in the available
output devices.

'earlycon' should work but you have to tell it the specific UART type
and address.

Ben.

-- 
Ben Hutchings
The obvious mathematical breakthrough [to break modern encryption]
would be
development of an easy way to factor large prime numbers. - Bill Gates

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Bug#878332: linux-armmp-lpae: Raspberry pi 2 hangs at boot Sebastian Reichel <sre@debian.org> - 2017-10-13 15:20 +0200
  Bug#878332: linux-armmp-lpae: Raspberry pi 2 hangs at boot Philip Rinn <rinni@inventati.org> - 2017-10-13 15:30 +0200
  Bug#878332: linux-armmp-lpae: Raspberry pi 2 hangs at boot Ben Hutchings <ben@decadent.org.uk> - 2017-10-14 00:30 +0200

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