Re: Power Management/PCMCIA conflict causes system freeze

[Larry LeBlanc <leblanc@inmotiontechnology.com>]

Larry LeBlanc wrote:

> Hi Russell,
>
> No luck...I enabled sysrq and verified it was working by issuing 
> sysrq-t and sysrq-p while the system was healthy. But when I cause the 
> hang sysrq-t and sysrq-p no longer do anything. One source I looked up 
> indicated that "Since it [Magic SysRq] is implemented as a part of the 
> keyboard driver, it is guaranteed to work most of the time, unless the 
> kernel itself is dead." So my conclusion is that my kernel is dead.
>
> Note: I tried sysrq-b on my system when it is healthy and it causes 
> the same hang.
>
> Larry
>
> Russell King wrote:
>
>>On Tue, Jul 22, 2003 at 11:24:25AM -0700, Larry LeBlanc wrote:
>>  
>>
>>>Any ideas? I've tried turning on debug in apm but all that happens is 
>>>the debug messages freeze with the rest of the system. Is there any 
>>>other location I should turn on debug messages to try to get an idea of 
>>>where the system is hanging?
>>>    
>>>
>>
>>You need to enable sysrq, cause a hang, and then issue a sysrq-t and
>>sysrq-p to find out where you're hanging.
>>
>>Note that if you're using a serial console, you need to hold the serial
>>port open for sysrq requests to be processed.
>>
>>  
>>
>