Messages in this thread | | | Date | Tue, 12 Aug 2003 11:10:56 +0200 | From | Karel Kulhavy <> | Subject | Hangup on nforce2 UDMA |
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Hello
Could you please try if your nforce2 MCP southbridge is also possible to be crashed the way I describe lower?
I have nforce2 motherboard Soltek SL75FRN2-L with MCP southbridge. Using 2.4.21 with AMD 74xx driver for IDE. If I leave the UDMA5 (UATA-100) setting BIOS leaves on the IDE disk I can hangup the machine almost deterministically with
cat /dev/hda > /dev/null
performed just after hard reset and subsequent boot. It hangs after max. a minute or so. If it doesn't work, try hard reset and again, then putting this script into /root/crash:
( a=0; while true; do echo $a; a=`/usr/bin/expr $a + 1`; sleep 1; done ) & cat /dev/hda > /dev/null
then adding this into your lilo.conf:
image=/boot/vmlinuz label=crash append="init=/bin/bash /root/crash" read-only
and finally lilo -D crash and reboot and hard reset. Repeat several times if the crash doesn't occur on the first try.
keyboard lights don't work, alt-sysrq-b doesn't work, power off doesn't work. Reset works. I tried NMI watchog but both with nmi_watchdog=1 and nmi_watchdog=2 I get NMI 14 or 15 in /proc/interrupts and it doesn't increment in 5 second intervals. Without nmi_watchdog I get NMI 0 in /proc/interrupts. Enabling NMI watchdog and waiting 5 seconds after the crash does nothing.
When UDMA is disabled in BIOS, I get lower performance of 17MB/s instead of 40MB/s. I have also tried IGNORE word93 Validation BITS and AMD Viper ATA-66 Override and none helped.
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