Comment 1 for bug 684888

Just tested the patches on an Intel Sandy Bridge. I can confirm that a kernel without the patches doesn't support running the intel_idle driver on Sandy Bridge (as expected). After booting into a kernel with the patches, intel_idle is loaded and runs.

$ uname -a
Linux sugarbay 2.6.35-23-generic #41-Ubuntu SMP Wed Nov 24 11:55:36 UTC 2010 x86_64 GNU/Linux

$ dmesg | grep "intel_idle"
[ 1.672968] intel_idle: MWAIT substates: 0x1120
[ 1.672970] intel_idle: does not run on family 6 model 42

$ uname -a
Linux sugarbay 2.6.35-24-generic #42+lp684888 SMP Fri Dec 3 19:11:30 UTC 2010 x86_64 GNU/Linux

$ dmesg | grep "intel_idle"
[ 1.662006] intel_idle: MWAIT substates: 0x1120
[ 1.662008] intel_idle: v0.4 model 0x2A
[ 1.662010] intel_idle: lapic_timer_reliable_states 0xffffffff
[ 1.663670] ACPI: acpi_idle yielding to intel_idle