Hello Sebastien,

Getting better?

When running my configured kernel in Qemu, poweroff does not work
properly: the machine is halted but the kvm process that runs it does
not terminate, whereas it does so when powering off the machine after
having booted a regular Debian kernel.

Current kernel configuration: http://paste.debian.net/233958/

Can anobody see what's missing or misconfigured?

Does it only happen with your kernel or with any kernel? I had similar
issue(but it was with any kernel, not only with custom kernels) on
Fedora, and for fixing I needed to install ACPI packages on Fedora.

This may be related:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760090



-- 
Peter