Hi everybody, a few months ago I bought myself a Shuttle K48 to use with Vortexbox as a media PC. I put in an old Intel Pentium dual-core E2140 that I had lying around. However, even after getting a better fan I still found it a bit on the noisy side, so I decided to try a 45ns cpu and got a dual core E5300. Better, but now speedstep stopped working. modprobe -v acpi_cpufreq gives me: FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.30.10-105.fc11.i686.PAE/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device By googling a bit I found the thread "[Help] I can't get Intel Speedstep working" on this list, started in march by Robert Szalai, who uses a Core 2 duo E7200, which seems to be essentially the same cpu as the 5300 but with faster bus speed etc. Since I still had the E2140 (Speedstep actually works with that CPU), I put it back in so I could do an acpidump with that cpu and compare the outputs. It seems to me that an SSDT is there when the E2140 is installed, and when I substitute the 5300 it goes away. Also, a few bytes in the RSDT differ. The SSDT definitely looks like it contains speedstep related stuff even though I know nothing about iasl. Since speedstep with 45ns processors apparently works in windows, would it be wrong to assume that windows (or whatever drivers Shuttle provide for windows) keeps a bunch of extra SSDT:s around and kludges them in if a 45ns CPU is present? Both acpidumps are attached and if someone creates some kind of patch I'll of course try it. Thanks a lot Rasmus Wiman
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k48-acpi.tar.bz2
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