Nevermind everyone, I've finally figured out that this is probably a hardware bug. My board won't support Cool'n'Quiet/PowerNow! unless I send it to MSI for re-work. Found this bit of info in the forum thread: http://forum-en.msi.com/index.php?topic=90409.0 Sucks! :/ 2011/3/11 Elvis Stansvik <elvstone@xxxxxxxxx>: > Hi all, > > I'm trying to get CPU frequency scaling to work on an MSI K8N > Master2-FAR motherboard running dual Opteron 252. > > At first, the powernow-k8 module wouldn't load saying "No such > device", but after a BIOS upgrade from version 1.1 to version 1.42 > from MSI, the 'powernow-k8' module loaded without problems. The dmesg > output when loading is attached as dmesg.txt. > > The output of `cpufreq-info' after loading the module looks fine, and > is attached as cpufreq-info.txt > > I can also load the two governor modules cpufreq_conservative and > cpufreq_ondemand without any problems. > > However, whenever I try to change the scaling governor to anything > else than the default (performance), by running e.g. > > cpufreq-set -r -g ondemand > > or > > cpufreq-set -c 0 -g ondemand > > I get an immediate reboot! > > I've also attached my /proc/cpuinfo as cpuinfo.txt. > > The two Opterons are OSP252FAABL. > > I'm running an up-to-date Arch Linux (x64) with kernel 2.6.37. > > Another interesting bit is that the "Cool'n'Quiet" option that was > present in BIOS version 1.1 disappeared when I upgraded to 1.42. > > I originally posted my problem on the Arch Linux Forum but was adviced > to bring it here. My original post can be found at [1]. > > Anyone have this board working with frequency scaling and dual CPUs? > Would love to get it to work as I'm more interested in silence than in > performance, and frequency scaling would allow my fans to spin down a > bit when I'm not doing CPU intensive work. > > Note that my processor model isn't detected (in /proc/cpuinfo or by > cpufreq-info). I believe this could possibly be due to BIOS not > recognizing the model either. The OSP252FAABL is identical to the > OSA252FAABL I think. It's just that they were only sold to system > builders like HP and IBM. Found mine on eBay. Could the fact that the > exact model isn't recognized by the kernel have something to do with > my reboot problem? > > Thankful for any advice/help! > > Best regards, > Elvis > > [1] https://bbs.archlinux.org/viewtopic.php?pid=902284 > -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
