Comment 302 for bug 274995

Even with kernel-smp 2.6.18-1.22000.fc5 the problem persists. I tried booting
with the 'acpi=ht' boot option, but the system still doesn't poweroff, the only
thing changed is the last message printed: "System halted" instead of
"acpi_power_off called".
The only way to let the computer shutdown automatically is to call modprobe -r
snd_hda_intel somewhere during the shutdown process (I moved it from kudzu to
the halt script just after the "saving mixer settings" lines).