I was trying to install CentOS 6.4 a workstation with an Abit AB9 motherboard on a machine that had been running 5.9 Installation completed, but upon boot, it hangs hard after acpiphp: ACPI Hot Plug PCI Controller Driver version 0.5 ipmi message handler version 39.2 … then 3 attempts to locate an ipmi interface at different addresses ... Refined TSC clocksource calibration: 2175.999 MHz switching to clocksource TSC Googling a bit, finds a few references to similar issues on gentoo and at lkml. There was a suggestion to boot with clocksource=acpi_pm but for me that hangs at the same location (minus the switching clock source message) I have updated the motherboard BIOS to latest. I had used the the 6.3 net installer disk (and the 6.4 repo) which I noticed had kernel 2.6.32-279, so I retrieved that kernel from the vault and it works. The 279 and earlier kernels don't display any ipmi messages during boot (in dmesg) The system is not ipmi capable I don't believe, should I be looking there? Regards Tony Schreiner _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos