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SubjectRe: CUV4X-D lockup on boot
Date
Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> > I have an ASUS CUV4X-D Dual Processor Mainboard based on a VIA
> > 694XDP chipset. I notice from the archives that someone else
> > has also reported a lockup with the m/b when using two cpus
> > and have some info that may be useful to track it down.
> >
> > Using kernel 2.4.5 the kernel locks up sporadically at boot
> > time. When I enable the NMI watchdog it occasionally gets
> > enabled prior to the lockup and perhaps can be useful for
> > debugging the problem. Here's what happens:
>
> At minimum you need the 1007 bios and to run noapic. As yet we don't know why
> or what the newer BIOS has done to make it boot at all

I had already replaced 1004 with 1007 and it didn't make any
difference. I'd rather solve the problem than work around it,
as it does boot, it just might take a couple of resets to do
so.

I've done a bit more printk tracing and now it consistently
hangs following this path in arch/i386/kernel/io_apic.c

1454 printk(KERN_INFO "..TIMER: vector=%d pin1=%d pin2=%d\n", vector, pin1, pin2);
1462 unmask_IO_APIC_irq(0);
1463 printk("io %d\n", __LINE__);
1464 if (timer_irq_works()) {
->
1076 static int __init timer_irq_works(void)
1077 {
1078 unsigned int t1 = jiffies;
1079
1080 printk("io %d\n", __LINE__);
1081 sti();
1082 printk("io %d\n", __LINE__);
1083 /* Let ten ticks pass... */
1084 printk("io %d\n", __LINE__);
1085 mdelay((10 * 1000) / HZ);
Following line isn't executed:
1086 printk("io %d\n", __LINE__);

Further details to follow...

Paul
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