linux-kernel - Re: 2.6.25-rc1 on Sun Ultra 40

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Message-Id: <1202929484.10687.1.camel@phobos.jasper.bg>
Date:	Thu, 14 Feb 2008 08:04:44 +1300
From:	Jasper Bryant-Greene <jasper@...x.geek.nz>
To:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.25-rc1 on Sun Ultra 40

I can confirm neither the boot hang with HPET enabled nor the other
unexplained boot hang after "NET: Registered protocol family 2" occur on
2.6.24.2 on the same hardware. I still don't have an appropriate way to
debug the issue on 2.6.25-rc1, though...

-j


On Thu, 2008-02-14 at 00:25 +1300, Jasper Bryant-Greene wrote:
> I have been attempting to test 2.6.25-rc1 on my Sun Ultra 40 (two
> dual-core Opteron 2222 CPUs).
> 
> There is some issue with the HPET clocksource which causes it to hang
> the boot process if enabled, which I will look into in due course (the
> HPET works fine on at least 2.6.19).
> 
> More pressing is that the system will not boot at all even with HPET
> disabled - kernel gets no further than "NET: Registered protocol family
> 2".
> 
> I cannot think of a way to find out what the problem is, because the
> system has only USB ports, and the USB keyboard is not working at this
> stage, either because the system has locked up hard, or because the USB
> support has not yet loaded (I tried both standard USB-HID and boot
> protocol keyboard support, both compiled in). Thus I cannot use
> magic-sysrq, or even scrollback to look at boot messages. There is also
> no serial port to assist with the latter...
> 
> Any thoughts on a procedure for debugging this would be much
> appreciated.
> 
> -j

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