From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtpde02.sap-ag.de (smtpde02.sap-ag.de [194.39.131.53]) by dsl2.external.hp.com (Postfix) with ESMTP id EE1444840 for ; Mon, 18 Feb 2002 04:49:10 -0700 (MST) Content-Type: text/plain; charset="iso-8859-1" From: Helge Deller To: Hinrich Aue , parisc-linux@lists.parisc-linux.org Subject: Re: [parisc-linux] Power LED Date: Mon, 18 Feb 2002 12:49:08 +0100 References: <20020218101505.54487.qmail@web21205.mail.yahoo.com> In-Reply-To: <20020218101505.54487.qmail@web21205.mail.yahoo.com> MIME-Version: 1.0 Message-Id: Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: On Monday 18 February 2002 11:15, Hinrich Aue wrote: > ------------------------------------------ > > >715/64, 715/80 and 715/100 belong to the so-called > >715/new machines and all of those support the > > soft-power > > >switch, else you wouldn't have received the > >"Shutdown requested..." message. > >In your case I assume, that your filesystems wasn't > > clean > > >before you did shutdown your system.... > > > >BTW, the shutdown is initiated by the kernel by > > sending > > >a SIGINT to the PID (cad_pid) of the init process. > > This > > >is done in the file power.c: > >http://cvs.parisc-linux.org/linux/arch/parisc/kernel/power.c?rev=1.5&conte > >nt-type=text/vnd.viewcvs-markup After receiving this signal the init > > process switches > >the runlevel, > >shuts down your system cleanly and runs > > /sbin/poweroff > > >or /sbin/halt. This is already the case and is also > >done > >that way for ATX systems. > > > >Regards, > >Helge > > But if I push the power button, the init process > doesn't seem do change the runlevel, and power off > immediatly. > I can see the message "Shutdown requested..." and then > - power off -. > I think this souldn't be so. Yes, that's wrong. But you seem to be the only one who has such problems with 715/new. As I said in another mail my Scorpio (715/50) machine shuts down immediately too - but this machine doesn't support the soft-power switch either. BTW, which kernel are you using ? > Also I think it is a bit dangerous if everyone can > switch of the system, clean or unclean, just by > pushing the button. That's right, but that's also the behaviour on Non-ATX PC's. > Maybe a 5 second push-time would be good (like ATX) > but with a gracefull shutdown. That's not that easy. On some systems the switch will send a key-down signal from the first press on, independantly if you released the button again or not. Other machines just send the signal while the button is down and stops it again if it was released. That said, this is how I wrote the code. In process_shutdown() you'll find: /* wait until the button was pressed for 1 second */ if (shutdown_timer == HZ) { static char msg[] = "Shutting down..."; printk(KERN_INFO "%s\n", msg); This means, that the kernel will just shutdown, if you pressed the button for at least 1 second. You might change that to 5*HZ if you want the 5 second push-time. But, as I said, the kernel can't recognize on some systems if you have released the button again and so it will always time-out and initiate the shutdown request. Your 715/80 seems to fall into this category of systems. Regards, Helge