Hello, I'm using Debian "testing" on a Dell Latitude D800 (Pentium M). I installed kernel-image-2.6.3-1-686, acpi, acpid, and cpufreqd. When I try to start cpufreqd, I get the following message:
find_cpufreq_interface(): no cpufreq interface found. Unable to find a cpufreq interface, please ensure to have cpufreq enabled in the running kernel. I'm no kernel expert, but I thought that ACPI (including the cpufreq interface?) was included in the 2.6 kernels? The kernel configuration contains the following lines: # # CPU Frequency scaling # CONFIG_CPU_FREQ=y CONFIG_CPU_FREQ_PROC_INTF=m CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set CONFIG_CPU_FREQ_GOV_PERFORMANCE=y CONFIG_CPU_FREQ_GOV_POWERSAVE=m CONFIG_CPU_FREQ_GOV_USERSPACE=m # CONFIG_CPU_FREQ_24_API is not set CONFIG_CPU_FREQ_TABLE=m # # CPUFreq processor drivers # CONFIG_X86_ACPI_CPUFREQ=m # CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set CONFIG_X86_POWERNOW_K6=m CONFIG_X86_POWERNOW_K7=m CONFIG_X86_POWERNOW_K8=m CONFIG_X86_GX_SUSPMOD=m CONFIG_X86_SPEEDSTEP_CENTRINO=m CONFIG_X86_SPEEDSTEP_ICH=m CONFIG_X86_SPEEDSTEP_SMI=m CONFIG_X86_P4_CLOCKMOD=m CONFIG_X86_SPEEDSTEP_LIB=m CONFIG_X86_LONGRUN=m CONFIG_X86_LONGHAUL=m Is this sufficient to enable CPU frequency scaling? The kernel prints the following ACPI-related messages: Dell Latitude with broken BIOS detected. Refusing to enable the local APIC. ACPI: RSDP (v000 DELL ) @ 0x000fdf00 ACPI: RSDT (v001 DELL CPi R 0x27d3091e ASL 0x00000061) @ 0x3fff0000 ACPI: FADT (v001 DELL CPi R 0x27d3091e ASL 0x00000061) @ 0x3fff0400 ACPI: ASF! (v016 DELL CPi R 0x27d3091e ASL 0x00000061) @ 0x3fff0800 ACPI: DSDT (v001 INT430 SYSFexxx 0x00001001 MSFT 0x0100000e) @ 0x00000000 ACPI: Subsystem revision 20040116 ACPI: IRQ9 SCI: Edge set to Level Trigger. ACPI: Interpreter enabled ACPI: Using PIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (00:00) ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 9 10 *11) ACPI: PCI Interrupt Link [LNKB] (IRQs 5 7) ACPI: PCI Interrupt Link [LNKC] (IRQs 9 10 *11) ACPI: PCI Interrupt Link [LNKD] (IRQs 5 7 9 10 *11) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 9 10 *11 12 14 15) ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGP_._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIE._PRT] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11 ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11 ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11 ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 11 ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11 PCI: Using ACPI for IRQ routing ACPI: (supports S0 S1 S3 S4 S4bios S5) ACPI: AC Adapter [AC] (on-line) ACPI: Processor [CPU0] (supports C1 C2 C3, 8 throttling states) ACPI: Thermal Zone [THM] (31 C) ACPI: Lid Switch [LID] ACPI: Power Button (CM) [PBTN] ACPI: Sleep Button (CM) [SBTN] ACPI: Battery Slot [BAT0] (battery present) ACPI: Battery Slot [BAT1] (battery absent) What does "Refusing to enable the local APIC." mean? The kernel recognizes that the cpu has throttling states. So, why does cpufreqd not work? Is there a way to enable the cpufreq interface without recompiling a kernel? Do I have to apply the patches from ACPI4Linux (I thought that they have already been integrated in the 2.6 kernels)? Thank you, Holger
