On Fri, Feb 14, 2014 at 3:42 PM, John Donnelly [off-list ref] wrote:

Hi,

 I tried using the SysRq hotkey sequence on a serial console -
3.11.0-5-powerpc-e500mc system, by issuing a " break " and the system
immediately wedges after displaying "SysRQ : HELP : " using both "Putty" and
"Teraterm"  terminal emulators. I know the system is dead because my ssh
sessions stopped too.

Yes it does work -- or at least it _did_ work.  Make sure your dts has an entry

                        compatible = "fsl,ns16550", "ns16550";

since that enables a workaround I'd added for a hardware errata relating
to sending breaks over the serial console.   What you describe above
makes me think you aren't getting the workaround enabled.

Paul.
--

http://en.wikipedia.org/wiki/Magic_SysRq_key .




--

Regards,
 John.

--

o Energy-efficiency is #1 reason data centers look to expand.  -- Digital
Realty Trust
o Green Data Centers spending to increase 300% worldwide by 2016.  -- Pike
Research
o Data Centers have become as vital to the functioni
ng of society as power stations.  -- The Economist


_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev