2.4.6-pre1 hard lockup
This morning I was running 2.4.6-pre1 and it locked up hard in X-windows. The mouse cursor was frozen, and I couldn't ping the box from another one on the network. The sysrq did work - to an extent. A tried the 's u b' combination, and although the sync and remount didn't work (filesystems needed fsck at boot - I think this means the sync and remount never finished), the re-boot did.
System activity at the time was running a CPU intensive audio application, which implies taking a lot of audio interrupts. System had been up for less than 24 hours.
I wish I had more info.
My system is a 700mhz Athlon, 256mb ram, Adaptec 2940UW, eepro100, and sound card is emu10k1 (sb live).
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David Mansfield (718) 963-2020 [email protected] Ultramaster Group, LLC www.ultramaster.com