[Bug 9636] New: cpufreq reports too low max freq on Intel P4

[Bug 9636] New: cpufreq reports too low max freq on Intel P4

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9636

           Summary: cpufreq reports too low max freq on Intel P4
           Product: Power Management
           Version: 2.5
     KernelVersion: 2.6.23
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: cpufreq
        AssignedTo: cpufreq@www.linux.org.uk
        ReportedBy: peter.ganzhorn@googlemail.com


Most recent kernel where this bug did not occur: -
Distribution: Debian testing
Hardware Environment: Intel P4 3.0GHz HT, Intel 945 chipset
Software Environment: Debian testing
Problem Description:
Using the acpi-cpufreq driver the CPU will not switch to a frequency higher
than 1.5 GHz; the sysfs cpufreq interface (cpuinfo_max_freq) reports 1.5 GHz to
be the maximum frequency available as well.
The same kernel without cpufreq support enabled does not show those problems,
the CPU will run at 3 GHz without cpufreq.
Kernel 2.6.23 and 2.6.24-rc* both show the problem.

Here some output with cpufreq enabled:
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 
1500000
# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq 
1500000
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
1500000 1400000

Actually it *should* report frequencies up to 3 GHz, but only does report up to
1.5 GHz.
I'm gonna attach the /proc/cpuinfo data to this bug report, let me know if you
need any other information.
This is a really, really nasty bug.

Steps to reproduce: Depends on my hardware I guess.


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[Bug 9636] cpufreq reports too low max freq on Intel P4

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9636





------- Comment #1 from peter.ganzhorn@googlemail.com  2007-12-26 04:35 -------
Created an attachment (id=14189)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=14189&action=view)
/proc/cpuinfo of the affected machine.


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[Bug 9636] cpufreq reports too low max freq on Intel P4

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9636





------- Comment #2 from peter.ganzhorn@googlemail.com  2007-12-26 04:39 -------
BTW: I'm using the ondemand-governor and acpi-cpufreq as driver:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver 
acpi-cpufreq
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 
ondemand


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[Bug 9636] cpufreq reports too low max freq on Intel P4

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http://bugzilla.kernel.org/show_bug.cgi?id=9636





------- Comment #3 from trenn@suse.de  2008-01-01 10:15 -------
First, look out for a BIOS update.

If this does not help, do you see any acpi warnings/errors in dmesg:
dmesg |grep -i acpi

If the BIOS update does not help, pls attach apcidump output.

This sounds like wrongly exported BIOS values for this CPU, which often get
fixed up by BIOS upgrades or possibly an ACPI interpreter bug.


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[Bug 9636] cpufreq reports too low max freq on Intel P4

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=9636





------- Comment #4 from peter.ganzhorn@googlemail.com  2008-01-27 03:20 -------
Latest BIOS update done, didn't help at all.
BTW the machine is an IBM ThinkCentre 9210-CTO.

$ dmesg |grep -i acpi
 BIOS-e820: 000000003f520000 - 000000003f536000 (ACPI data)
 BIOS-e820: 000000003f536000 - 000000003f600000 (ACPI NVS)
ACPI: RSDP 000F6590, 0014 (r0 PTLTD )
ACPI: RSDT 3F53003F, 0040 (r1 PTLTD    RSDT    60400D0  LTP        0)
ACPI: FACP 3F535E2B, 0074 (r1 IBM    THINKCEN  60400D0 PTL         1)
ACPI: DSDT 3F530761, 56CA (r1    IBM THINKCEN  60400D0 MSFT  100000E)
ACPI: FACS 3F58BFC0, 0040
ACPI: TCPA 3F535E9F, 0032 (r2 IBM    THINKCEN  60400D0 PTL         1)
ACPI: MCFG 3F535ED1, 003C (r1 PTLTD    MCFG    60400D0  LTP        0)
ACPI: APIC 3F535F0D, 0068 (r1 PTLTD      APIC    60400D0  LTP        0)
ACPI: BOOT 3F535F75, 0028 (r1 PTLTD  $SBFTBL$  60400D0  LTP        1)
ACPI: ASF! 3F535F9D, 0063 (r32   CETP     CETP  60400D0 PTL         1)
ACPI: SSDT 3F53007F, 01FB (r1  PmRef    CpuPm     3000 INTL 20030224)
ACPI: PM-Timer IO Port: 0x1008
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Using ACPI (MADT) for SMP configuration information
ACPI: Core revision 20070126
ACPI: bus type pci registered
ACPI: EC: Look up EC in DSDT
ACPI: Interpreter enabled
ACPI: (supports S0 S5)
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI quirk: region 1000-107f claimed by ICH6 ACPI/GPIO/TCO
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.EXP0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.EXP1._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.SLOT._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 *7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 7 *9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKF] (IRQs *3 4 5 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 7 9 10 *11 12 14 15)
pnp: PnP ACPI init
ACPI: bus type pnp registered
pnp: PnP ACPI: found 14 devices
ACPI: ACPI bus type pnp unregistered
PCI: Using ACPI for IRQ routing
ACPI: RTC can wake from S4
ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 17 (level, low) -> IRQ 16
ACPI: PCI Interrupt 0000:00:1c.1[B] -> GSI 16 (level, low) -> IRQ 17
ACPI: Power Button (FF) [PWRF]
ACPI: Power Button (CM) [PWRB]
ACPI: SSDT 3F53030A, 01C3 (r1  PmRef  Cpu0Ist     3000 INTL 20030224)
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI: SSDT 3F53027A, 0090 (r1  PmRef  Cpu1Ist     3000 INTL 20030224)
ACPI: Processor [CPU1] (supports 8 throttling states)
ACPI: Thermal Zone [THM0] (60 C)
ACPI: PCI Interrupt 0000:00:02.0[A] -> GSI 16 (level, low) -> IRQ 17
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 17
ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 18
ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 23 (level, low) -> IRQ 19
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 18
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 20
ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 16 (level, low) -> IRQ 17
ACPI: PCI Interrupt 0000:00:1f.3[B] -> GSI 19 (level, low) -> IRQ 18

acpidump output attached. Sorry for the little delay but I didn't have physical
access to the machine to do the BIOS upgrade for the last 2 weeks.
Thanks for investigating this :)

Peter


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[Bug 9636] cpufreq reports too low max freq on Intel P4

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http://bugzilla.kernel.org/show_bug.cgi?id=9636





------- Comment #5 from peter.ganzhorn@googlemail.com  2008-01-27 03:21 -------
Created an attachment (id=14595)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=14595&action=view)
acpidump output.


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[Bug 9636] cpufreq reports too low max freq on Intel P4

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http://bugzilla.kernel.org/show_bug.cgi?id=9636


eyrich@tkn.tu-berlin.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eyrich@tkn.tu-berlin.de




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