On Fri, 2009-04-10 at 12:16 +0100, Karanbir Singh wrote: > Mark Pryor wrote: > > Using kernel: > > 2.6.18-92.1.13.el5.centos.plus > > the cpu throttling works as desired (see 2 traces below) > ... > > When I update to the newer xx-128.1.6 centosplus kernel all the throttling stops and the box runs at highest speed. > > This is an issue that came up in the early 5.2 days, and has been > recurring since. I lost cpuspeed control on my desktop at home as well ( > amdx24800/m2n) with the kernel update. Have not started digging into > this, but the last time I did upstream blamed it on badly done acpi code > in the system BIOS. It *should* now be possible to blacklist the > powernow-k8.ko code and let the kernel fallback to using the generic > acpi layer again. YMMV. --- Good thing to know it's just not happening to me also. I also have client machines this has affected and my own personal machines. This was with the p4-clockmod driver. Motherbords all were Asus. Also affected one Celeron machine on an Asus board. JohnStanley