[mythtvnz] Pointers on how to track down machine lockup

[Douglas Pearless]

This sounds very familiar, I had the same issue and it turned out to be a recent kernel bug with lirc/usb (listed  here https://bugs.launchpad.net/bugs/642517). 

Does this look like your problem? 

Can you regress back to an earlier kernel? 

Cheers 

Douglas. 

Quoting Wade Maxfield <mythtvnz at hotblack.co.nz>:

> On 11/10/2010, at 4:38 PM, Wade Maxfield wrote:
>
>>> If you have another PSU on hand, that would be the next best thing to
>>> check.
>>
>> I do have the 430W supply from the just retired backend.  It should 
>> be enough to cover the requirements of the new machine, since the 
>> old one ran the same cards & 5 HDs.
>>
>> There was a break in the recording schedule  at lunch, so I've just 
>> swapped that in and will see how that goes over the next week. It's 
>> about 4 years old and at idle the machine now registers as using 
>> 134W (up from 122W that it used with the new PSU).
>
> Ok. Running on old PSU and the machine locked up.  Turned on the TV 
> and GDM wasn't running anymore, but the console was visible.  It 
> basically showed the messages from just before the gnome login screen 
> appeared when I booted the machine yesterday. I also had a PS2 
> keyboard connected and the Caps Lock & Scroll Lock LEDs were 
> blinking. The machine didn't respond to any keyboard inputs. From a 
> bit of googling the blinking LEDs seem to indicate a kernel panic.
>
> There are no messages in kern.log or syslog around this time, pretty 
> much the same as the logs I posted earlier.
>
> The machine was recording off a DVB-S card and a PVR card, while 
> streaming a single SD file to a remote frontend, so nothing CPU 
> intensive. Heat doesn't look to be a factor (based on temps from 
> running cpuburn). memtest didn't report any errors when it was run 
> overnight (but that was a few weeks ago now), so RAM looks to be 
> alright.
>
> I'm yet to run seatools so I'll do that in the morning.
>
> Other than that, where to next?
>
>  -- Wade
>
>
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