msdos 6 disk with errors

Hello.

Special kernel messages printed on an error condition.
May contain the string "Oops", "invalid operand", "stack segment" etc - depending on an exception that was raised by CPU.

Then search for "Call Trace" string - this should be common for any kind of an oopses.
Search it in /var/log/messages (or wherever your system logs are).

If it is -ac, then there is no that bug, but if it is Marcelo's one - then the bug is still there (but not in 2.4.20-pre).

but why do they cause the entire system to freeze, but only if you are in x? alt+sysrq+b is the only kernel key that works.
alt+sysrq+[krsu] all do not work...nor does ctrl+alt+backspace.