Public bug reported: Binary package hint: linux-image-2.6.35-28-server
I have installed Ubuntu server 10.10 on my new computer which uses AMD Phenom II X6 1090T. I have upgraded my kernel to 2.6.35-28-server. But I have noticed that my CPU cores were not able to run at 3.6GHz at any time, even when I only have one CPU-intensive computing job. They are either at 3.2 GHz or 800 MHz, like this $ cat /proc/cpuinfo | grep -i "cpu Mhz" cpu MHz : 800.000 cpu MHz : 3200.000 cpu MHz : 3200.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 My maximum CPU frequency seems to be locked at 3.2 Ghz: Code: $ dmesg | grep "pstate 0" [ 1.595918] powernow-k8: 0 : pstate 0 (3200 MHz) I googled around and it seems that Linux 2.8.35 kernel have solved the problem. I just do not understand why it does not work on mine. $ uname -a Linux hogwarts 2.6.35-28-server #49-Ubuntu SMP Tue Mar 1 14:55:37 UTC 2011 x86_64 GNU/Linux I think Ubuntu needs to fix this problem because server users will stick on one version. Therefore, even if this problem will be fixed in future release or is already fixed in other Ubuntu variants, server users won't have the chance to reinstall them. If this bug can be fixed, they only need to upgrade. PS: Some discussions are here: http://ubuntuforums.org/showthread.php?t=1709264 ** Affects: linux-lts-backport-maverick (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/748098 Title: AMD Turbo Core not working on Ubuntu server 10.10 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
