[ltp] diagnosing a freeze on T60p with ubuntu hardy

[Phil Shotton]

OK, tailing /var/log/messages shows I do get the emergency sync message 
AND the screen snapshot.
It's quite sensitive to having all three keys pressed together, you 
can't press and hold alt, then sysrq, then s.
Now I'm ready for my next crash!

Thanks
Phil

Marius Gedminas wrote:
> On Wed, May 21, 2008 at 11:27:04AM -0300, Henrique de Moraes Holschuh wrote:
>   
>> On Wed, 21 May 2008, Phil Shotton wrote:
>>     
>>> I get the "Save screen snapshot" popup :-(
>>>       
>> Then you are NOT issuing SysRQ.  That is trapped well before any crap in
>> userspace can see it.
>>     
>
> That seems not to be the case.
>
> When I press Alt+SysRq+S (which shares the key with PrintScreen), I get
> both a keycode visible to userspace (mapped to "take a screenshot of the
> active window" in GNOME by default), and the usual kernel's reaction
> (SysRq: Emergency Sync in dmesg).  Holding down Alt+SysRq for a longer
> time results in a big bunch of screenshot dialogs.
>
>   
>> In the T43 it works, I do Alt+"PrtSc/SysRq"+S, then the same for U, then
>> the same for B.
>>
>> (sync + emergency umount/remount read-only + boot).
>>     
>
> Marius Gedminas
>