Re: 2.6.38-rc6: SysRq broken?

From: Bruno PrÃmont
Date: Mon Feb 28 2011 - 17:00:11 EST

On Mon, 28 February 2011 Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:
> It just strikes me that SysRq is broken here:
> Alt+SysRq+h doesn't print anything
> kernel.sysrq=1
> echo h >/proc/sysrq-trigger works
> Keyboard is USB one, "Logitech HID compliant keyboard".

I've seen same kind of issue with built-in keybaord (PS2) of my laptop.

Sysrq-Sync, Sysrq-Umount, Sysrq-Help didn't work but Sysrq-reBoot did.

In my case it was during "stuck" shutdown process, caps key was still
working and toggled caps LED anything else didn't trigger anything visible.

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