On Wed, 2009-12-16 at 02:15 +0800, Matthew Garrett wrote: > Commit 9a884ab64a4d092b4c3bf24fd9a30f7fbd4591e7 (ACPICA: Add additional > module-level code support) results in one of my test machines hanging at > boot. The last line output is: > > bio: create slab at 0 > > which would normally be followed by > > ACPI: EC: Look up EC in DSDT > > but instead the machine hangs without printing this line. Reverting the > commit results in the machine booting. acpidump output attached. > Hi, Matthew Could you try the attached ACPICA latest release (20091214) patch series? There are module level code and _REG method fixes included in it. Checkout Linus' tree. git am acpica-v20091214.patch Thanks, Lin Ming