Tentatively, I think I have this beat. Using the steps below, my system has not gone into sleep mode as a result of overheating. I tested with Dropbox consuming 100% of one of the CPUs and by copying a 30 GB file from an external USB drive to my Desktop. The file transfer averaged 78 degrees and did not cause the system to go into sleep mode; before, temps would go into the 90s and trigger sleep mode or a crash. Without the big CPU hogs running, my system averages in the lower 60s; before, it averaged in the 70s and 80s. I will certainly be doing future installations using grub2-efi.
1. In order to get your fan speed to adjust correctly, first be sure to purge applesmc-dkms and macfanctld using apt-get or "Mark for Complete Removal" using Synaptic. Then, steps 1 through 9 here - http://ubuntuforums.org/showthread.php?t=1754431 - and be sure to purge applesmc-dkms and macfanctld using apt-get or "Mark for Complete Removal" using Synaptic. Then, to monitor my temperatures and fan speed, I downloaded psensors from the Ubuntu Software Center instead of the remaining steps. 2. In order to get the system to stop generating so much heat in the first place, configure grub2 to boot from EFI. As explained in many posts here - http://ubuntuforums.org/showthread.php?t=969183 - the MBR grub seems to cause the overheating issues (perhaps due to the video drivers in Macbooks with integrated+discrete graphics - http://support.apple.com/kb/HT3246 - but my MB 4,1 seems to have only an integrated GMA X3100 GPU and I did nothing to it after switching to the grub2-efi). How to do this depends on how your system was installed. For reference - http://www.rodsbooks.com/efi-bootloaders/installation.html https://help.ubuntu.com/community/UEFIBooting The preceding applies to Ubuntu 11.10 Oneiric on a Macbook 4,1 (early 2008) although the references should explain the procedure for other configurations. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/921714 Title: Macbook overheating To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/921714/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
