On Wed, Jun 27, 2007 at 12:42:18PM -0700, Radu-Cristian FOTESCU wrote: > > ... but I am curious: how are you determining that a Linux box is frozen?
First, the clock on the gnome panel freezes. After a minute of that, no response to ctrl-alt-backspace. Then, no response to ping from another machine. Finally, in this case, no response to the reset switch; THAT is a lockup indeed! It took a power interruption to bring the machine back. I'm guessing the problem is due to the Adaptec 2940 SCSI card doing something really nasty to the bus, perhaps trying to DMA an infinite-length record. Given the enormous data files that a a scanner can potentially produce, an driver that does not do proper bounds checking, or does not recover from bus errors (the cable approaches the length limit) might freeze the bus this way. It is interesting that an obsolete user configuration can bring this about. This is all rank speculation, of course. Keith -- Keith Lofstrom [EMAIL PROTECTED] Voice (503)-520-1993 KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon" Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs
