Hi, everyone. My laptop is also M4600 which CPU is 2820qm and running Ubuntu 11.04. I have also suffered from this problem for months: The maximum frequency of the CPU is 2.3Ghz while Ubuntu recognized it as only 1.6Ghz. It seems that the cause of this problem is Ubuntu got wrong CPU information from BIOS.
I finally found a solution from a website - it works well on my laptop. Edit this file: sudo gedit /etc/default/grub find the line of: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" adding processor.ignore_ppc=1 within the quotation mark. Let OS to ignore the wrong CPU information save and run "sudo update-grub" in terminal, enabling the code added previously. Restart and the problem will be solved! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/819605 Title: Dell M4600 has problems with CPU Freq Scaling on Ubuntu 11.04 64bit. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/819605/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
