I tried the sysreq=1 and nmi_watchdog=1 settings. I also hooked up a serial cable to Com1. I even setup agetty to watch Com1 and logged in to make sure that the connection is good. However, when the system locks, alt-printscreen-p doesn't do anything and I don't see any output on the serial port. Am I doing something wrong? Is there anything else I can try? <> Jim > -----Original Message----- > From: fedora-list-bounces@xxxxxxxxxx [mailto:fedora-list- > bounces@xxxxxxxxxx] On Behalf Of Small, Jim > Sent: Thursday, March 18, 2004 7:34 PM > To: For users of Fedora Core releases > Subject: RE: Hard Lock with Fedora Core 1 > > Norman, > > Thank you for the configuration settings. I will try those tomorrow. > > Funny that BSD/OS ran for so long without hard locks. Since Linux is > aggressive in using memory, I was thinking it could be a memory (RAM) > issue. > So I am running memtest86 3.1 overnight on the machine to grill the RAM. > If > there are no memory errors detected I'll try those settings tomorrow. > > I have a console cable. I'm assuming I just connect it to Com1 and watch? > I'll try it tomorrow. I use console cables all the time for network > devices > and Suns, but not much for x86 boxes (which this is). > > On the one hand this is frustrating, but on the other, that's how you > learn, > right?!? > > Thanks again, > <> Jim > > > -----Original Message----- > > On Thu, Mar 18, 2004 at 06:53:38PM -0500, Small, Jim wrote: > > > I've tried only using one NIC that doesn't share any IRQs (no bridging > > or > > > shared interrupts). Like I said, this box ran for months without > > locking > > > running BSD/OS. What could be causing it to hard lock? > > > > > > Is there some kernel option I can use to help debug the problem? Are > > there > > > any troublesome modules I should eliminate? > > > > You could try enabling the sysreq key. That is, in /etc/sysctl.conf, > > set this: > > > > # Controls the System Request debugging functionality of the kernel > > kernel.sysrq = 1 > > > > then run "sysctl -p" > > > > Then, when the system hangs, on the console hit 'alt-prntscrn-P' to > > see where the processors are locked. alt-prntscrn-H will show you other > > commands you might want to try. A serial console is needed to collect > > or view all the output. > > > > Setting NMI watchdog could also be helpful. Do that by putting > > "nmi_watchdog=1" in the options of the kernel line in grub.conf. > > The system should oops if it locks up. > > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
