At today's crash I tried Alt-SysRq S(ync) U(nmount) B(oot). Didn't work. By watching my syslog I have verified that it works while the system is up and running. So the hang is in some place that prevents Alt-SysRq from doing its thing. Help? -- 2.6.15-23-686 hangs a couple of times per week https://launchpad.net/bugs/49450