Eero Volotinen wrote: > On 1/4/10 10:57 PM, Scot P. Floess wrote: >> I've got a Dell Optiplex GX240 I am running CentOS 5.4 >> (kernel 2.6.18-164.9.1.el5.centos.plus)... When I had Fedora 11 and 12 on >> it, I could issue a poweroff command and the machine would power itself off. >> However, under CentOS it doesn't turn the machine off whatsoever. When it >> completes, the machine is still running with a message of "system halted." >> Then I have to physically hit the power button to turn it off... I >> believe at some point I did try to issue a shutdown command - but had the >> same results... >> >> Anyone have any recommendations or suggestions? > > buggy acpi support on server? Try updating to latest bios? No, I'm not the OP. But, I found a solution for my system. During boot, I noticed an error line -- "BIOS fails cutoff age - ACPI might not work. Use acpi=force to fix." So I did; the machine now actually turns off after shutdown.