I can't completely reproduce this issue, but I'm running Ubuntu 11.04 (beta) 32-bit. I haven't seen the fan run higher than the min speed, however so it's possible that the fan control is broken.
Could you paste a copy of the following information? Fan status: $ cat /sys/devices/platform/applesmc.768/fan{1,2}_{label,input,min,max} Left side 1999 2000 6000 Right side 1994 2000 6000 Temp status: $ cat /sys/devices/platform/applesmc.768/temp* | paste -s -d '\t\n' 60000 TG0T 61000 TMCD 58500 TP0P 64000 TPCD 51000 Th1H 50750 Th2H 52750 Tm0P 32000 Ts0P 43500 Ts0S 35250 TB0T 35250 TB1T 33500 TB2T 58500 TC0C 59500 TC0D 56500 TC0P 61000 TC1C 58000 TG0D 56000 TG0P -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/742257 Title: Natty Narwhal 64-bit for Mac: macbook pro runs very hot - no fans can be heard -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs