Hi! > > So if you compile a kernel, then reboot, boot will hang after "Freeing SMP > > alternatives memory" (and then wastes power, making thermal situation even worse). > > Normally, next message is "smpboot: CPU0: Genuine Intel...". > > I added some printks, and check_bugs() returns. Then it goes to ACPI and never > comes back... > > kernel-parameters.txt points to Documentation/acpi/debug.txt, but that one does not exist. > > Any ideas what debugging parameters to use for ACPI? I either get nothing or > so much that machine does not boot... I ended up adding printks... It hangs in acpi_hw_set_mode(). ACPI enable: set mode: acpi ACPI: hw_set_mode ACPI: hw_set_mode mode switch ACPI: write_port? ACPI: os write port we write to the port but that never returns. I assume SMM is doing its magic at that point. Any ideas how to debug it further? Is it possible that it is some kind of screaming interrupt? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
