Public bug reported:
Binary package hint: kernel-image-2.6.24-7-powerpc-di
CPU scaling on G4 Tibook does not occur with current hardy kernel. The
cpu_freq modules must be compiled in the kernel to work.
All other previous versions of Ubuntu worked fine.
These lines must be all changed to built-in (y) for power management to
work.
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
CONFIG_CPU_FREQ_GOV_ONDEMAND=m
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=m
I tested a vanilla 2.6.24.2 kernel configured with a pmac32_defconfig
under hardy (uses built in cpu_freq), and scaling works properly.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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hardy kernel config does not allow powernowd scaling (powerpc)
https://bugs.launchpad.net/bugs/192677
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