Re: Sysrq via serial line?
Send a BREAK signal. Most terminals/terminal s/w can.
--
Paul
On Thu, Sep 30, 2004 at 06:01:39PM +0100, Martin Habets wrote:
> Hi,
>
> I'm using minicom to connect to a headless sparc running 2.6.8.
> Have MAGIC_SYSRQ built into the kernel, but cannot find a way to trigger
> it from the keyboard. echo into /proc/sysrq-trigger works fine.
>
> Sending a break gets me into openboot prompt.
>
> Have tried to use setkeycodes but it does not work for me. Initially
> I had CONFIG_VT turned off, and setkeycodes gave:
> Cannot get file desciptor for console
> or something similar to that.
> With CONFIG_VT turned on, but no keyboard support, I get:
> KDSETKEYCODE: No such device
> failed to set scancode 1b73 to keycode 84
> Turning on keyboard may help, but that's not right is it? I'm using a
> serial port, not a keyboard.
>
> I'm using the sunzilog driver, but it seems to trigger sysrq after a
> break signal in uart_handle_break(). But sendig a break gets me into
> openboot.
>
> Is there a solution?
>
> >From dmesg:
> ttyS0 at MMIO 0x0 (irq = 44) is a SunZilog
>
> Thanks,
> --
> Martin
>
>
> --
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