Indeed, when I compare them: acpi_idle (without the patch):
CPU%c1 CPU%c6 CPU%c7 CoreTmp PkgTmp GFX%rc6 Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 Pkg%pc8 Pkg%pc9 Pk%pc10 PkgWatt 29.48 0.00 60.71 58 58 97.96 16.96 0.00 0.00 0.00 0.00 0.00 0.00 6.08 intel_idle (with the patch): CPU%c1 CPU%c6 CPU%c7 CoreTmp PkgTmp GFX%rc6 Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 Pkg%pc8 Pkg%pc9 Pk%pc10 PkgWatt 56 56 96.64 300 68.29 48.58 0.00 0.00 0.00 0.00 0.00 0.00 7.38 0.00 With intel_idle we reach PC10, without it we only go as deep as PC2 - huge difference. I really wonder why the BIOS does not expose deeper C-states... And if it does not, is this for a reason? And how windows works then? May be there is a BIOS update that fixes this problem? May be Windows user get it quickly because stuff like this is often well-integrated in Windows? Would you please check if there is newer BIOS? Artem.
