RE: [parisc-linux] Power button on 712

RE: [parisc-linux] Power button on 712

[Witvliet, Hans]

Under hp-ux, if you press the "power-button" on the front, the system traps
it, and performs a "shutdown -h now"  (at least it takes ages to stop)
So the button on the front is not a BRS, but just generates a irq (on some
systems anyway....)

I presume this irq could be trapped under linux aswell, not?

Hans
	-----Original Message-----
	From:	Jan-Benedict Glaw [SMTP:jbglaw@lug-owl.de]
	Sent:	Thursday, November 22, 2001 2:53 PM
	To:	parisc-linux@lists.parisc-linux.org
	Subject:	Re: [parisc-linux] Power button on 712

	On Thu, 2001-11-22 15:48:41 +0200, Kaj-Michael Lang <milang@tal.org>
	wrote in message <003801c1735c$6581b7b0$56dc10c3@amos>:
	> This might sound really strange but anyway:
	> 
	> Should the power button work under Linux ?
	> Even after halting I need to pull the cord to get my machine to
power down,
	> as it won't respond to the the power button.

	During initialisation of hardware (the front LED is blinking) you
	can "easily" switch off the machine. But, after the OS was started,
	it's not such a good idea to allow an user to simply fiddle with
	the BRS (-> big red switch). Try to /sbin/poweroff or to /sbin/halt
	your box and try again:-)

	MfG, JBG

	-- 
	Jan-Benedict Glaw   .   jbglaw@lug-owl.de   .   +49-172-7608481
		http://lug-owl.de/~jbglaw/software/snapshot2cvs/

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RE: [parisc-linux] Power button on 712

[Jurij Smakov]

On Thu, 22 Nov 2001, Witvliet, Hans wrote:

> Under hp-ux, if you press the "power-button" on the front, the system traps
> it, and performs a "shutdown -h now"  (at least it takes ages to stop)
> So the button on the front is not a BRS, but just generates a irq (on some
> systems anyway....)
> 
> I presume this irq could be trapped under linux aswell, not?

Hi!

I've posted a question about that on the list some time ago. According to
lasi docs, cutting of the power with the power switch should generate a
power failure interrupt, which I thought I could catch and make a clean
shutdown. I suppose, that it should be an interruption with code 2, so
I've added a handler for that in arch/parisc/kernel/traps.c (I think).
Well, it never became triggered by the power switch, and I have no idea,
why.

Best regards,

Jurij

[parisc-linux] Power button support in kernel 2.4.16-pa4

[Helge Deller]

Hi,

I've just committed some changes to the parisc cvs kernel (>= 2.4.16-pa4)
which adds support for the power-button.
Those changes include, that after you pressed the power button the kernel
will initiate a clean system shutdown followed by a complete power-off.
The patches were sucessfully tested on a c300 and 715/64 - and hopefully
they will also work for other machines - if not, please let me know.

Greetings,
Helge