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Re: Boot hangs after upgrade to 9.4 at sp5100_tco I/0 address 0x0cd6 already in use

On 2018-03-11, Curt <curty@free.fr> wrote:

It seems that on this AMD machine I would have been better advised to
blacklist the 'i2c_piix4' module rather than the sp5100_tco watchdog.

I wonder what the canonical procedure for this should be?  A file in
/etc/modprobe.d? A kernel command line parameter?

> Hi there,
> So, intrepid me (not really) I upgrade my Stretch to 9.4 and (re)booted this
> morning without success (boot hangs at or with the line "sp5100_tco I/0
> address 0x0cd6 already in use").
> Now, I'm impatient by nature, and after five or ten minutes staring at the
> "sp5100" line I rebooted into recovery mode, whereupon a fsck was
> performed. At which point I entered the "systemctl default" command and
> the machine booted up fine into my LXDE desktop.
> I blacklisted the 'sp5100_tco module.' Apparently there is a conflict
> between that module and the i2c_piix4 module. It appears I can have one
> or the other but not both at the same time.
> I'm unclear about the implications of my blacklisting sp5100 but after
> having done so I rebooted successfully with no hangs.
> BTW, I've had the sp5100 warning message at boot ever since I converted
> to systemd. But with only a ten second delay or so. Not sufficient to try my
> patience.
> So here I am without a watchdog. 

Bah, the latest news, the latest news is not the last.
Samuel Beckett

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