K.S. Bhaskar on 28 Sep 2008 19:05:18 -0700

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Re: [PLUG] Debugging looping reboots

I was never able to narrow it down with Ubuntu, but with Fedora Core
10, I narrowed the problem down to the kernel module acpi_cpufreq.  In
64-bits, the instant the module is loaded, the laptop reboots.  If I
make sure the module is never loaded, the laptop runs fine, but I
can't shut it down - I have to reboot and hit the power switch as it's

In 32-bits, everything runs fine, so that's what it's going to college
with.  The whole thing is most puzzling.  Now I understand why the
guide book for our brave new world of free / open source software is
called "The Cathedral and the Bizarre!"  8-)

-- Bhaskar

On Sat, Sep 20, 2008 at 12:42 PM, K.S. Bhaskar <bhaskar@bhaskars.com> wrote:
> My son disregarded my advice (he's at that age when dads don't know
> much) and bought a new high end laptop (Extreme Notebooks Raptor 560x;
> I advised him to go with System76).  The hardware is so leading edge
> that the only Linuxes I have been able to get to recognize all the
> hardware are Fedora Core 9 & 10 and Ubuntu Intrepid Ibex.  The catch
> now is that I can't get it to run 64-bit Linux (32-bits runs fine).
> With any 64-bit Linux installed on hard drive, and any 64-bit Ubuntu
> CD, when it boots, it comes up, starts booting, loads the kernel
> successfully, and then spews a bunch of text too fast for me to read
> and then goes into a hard reboot.  It will do this for ever.  There is
> nothing meaningful in /var/log/* after this process (when I look with
> a 32-bit live CD).
> With 64-bit Fedora, I can run a live CD, but when I install it to the
> hard drive, it has the same problem.
> Since my reading and reflexes are not as fast as the computer, any
> suggestions on how to troubleshoot this?  Is there any way to boot
> step by step so that I can see what is causing it to croak?
> Otherwise, it will be forced to run a 32-bit Linux.
> Thank you very much, in advance.
> Regards
> -- Bhaskar
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