Re: [Xen-users] SysRq over serial console, anyone?

[Kyle Lexmond <kyl191@xxxxxxxxxx>]

Potentially silly question, but is sysrq support enabled? I had to
enable kernel.sysrq in /etc/sysctl.conf before my Fedora 16-based dom0
would respond to anything. Not sure if Debian has it enabled by
default though.

(And then I did a xm sysrq 0 e, which you should never ever ever do,
but that's a different story.)

- Kyle

On Fri, Dec 16, 2011 at 6:19 PM, svenvan svenvan <svenvan.van@xxxxxxxxx> wrote:
> Hi,
> Anyone was able to invoke sysrq over serial console for dom0?
>
> my grub configuration:
>
> titleÂÂÂÂÂÂÂÂÂÂ Xen 4.0.1 / Debian GNU/Linux, kernel 2.6.32.47
> rootÂÂÂÂÂÂÂÂÂÂÂ (hd0,0)
> kernelÂÂÂÂÂÂÂÂÂ /boot/xen-4.0.1.gz dom0_mem=1024M loglvl=all
> guest_loglvl=all com1=38400,8n1 console=com1
> moduleÂÂÂÂÂÂÂÂÂ /boot/vmlinuz-2.6.32.47
> root=UUID=5563bc26-6e98-4768-abee-5ca053e2795c ro nomodeset max_loop=255
> console=hvc0 earlyprintk=xen nomodeset
> moduleÂÂÂÂÂÂÂÂÂ /boot/initrd.img-2.6.32.47
>
> tried with minicom and screen. I can send break but then sysrq does not
> work. Maybe something related to hvc0?
> Any hints would be really appreciated
> Thanks
>
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