[Bug 14771] "ondemand" never raises frequency on an Intel Core2 Due (T9900) in a recent Dell E6500

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http://bugzilla.kernel.org/show_bug.cgi?id=14771


Petr Baudis <pasky@xxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pasky@xxxxxxx




--- Comment #13 from Petr Baudis <pasky@xxxxxxx>  2010-02-20 09:06:13 ---
I have the same problem with i7 920; currently using 2.6.32.8, but 2.6.27 is
already having trouble; all the symptoms from bug description are the same.

For me, even on 2.6.32.8, switching cpufreq governor from ondemand to
performance seems to fix the issue fine, but I haven't had to do it many times
yet. Also, I don't have this problem on Core2 Duo Q9300 machines.
HyperThreading turned on/off does not make a difference for the i7 machine.

I have now also found one i7 machine (supposedly identical) where I seem *NOT*
to have this problem.
diff -u broken_dmesg working_dmesg shows:
@@ -117,6 +71,14 @@
 PM: Adding info for acpi:LNXCPU:05
 PM: Adding info for acpi:LNXCPU:06
 PM: Adding info for acpi:LNXCPU:07
+PM: Adding info for acpi:LNXCPU:08
+PM: Adding info for acpi:LNXCPU:09
+PM: Adding info for acpi:LNXCPU:0a
+PM: Adding info for acpi:LNXCPU:0b
+PM: Adding info for acpi:LNXCPU:0c
+PM: Adding info for acpi:LNXCPU:0d
+PM: Adding info for acpi:LNXCPU:0e
+PM: Adding info for acpi:LNXCPU:0f
 PM: Adding info for acpi:LNXSYBUS:00
 PM: Adding info for acpi:PNP0C0E:00
 PM: Adding info for acpi:PNP0A08:00
@@ -177,6 +139,7 @@
 PM: Adding info for acpi:device:25
 PM: Adding info for acpi:device:26
 PM: Adding info for acpi:device:27
+PM: Adding info for acpi:PNP0103:00
 PM: Adding info for acpi:pnp0c14:00
 PM: Adding info for acpi:LNXTHERM:00
 PM: Adding info for acpi:LNXPWRBN:00
@@ -216,7 +179,6 @@
 pci 0000:00:1d.7: reg 10 32bit mmio: [0xd0321000-0xd03213ff]
 pci 0000:00:1d.7: PME# supported from D0 D3hot D3cold
 pci 0000:00:1d.7: PME# disabled
-pci 0000:00:1f.0: Force enabled HPET at 0xfed00000
 pci 0000:00:1f.0: quirk: region 0400-047f claimed by ICH6 ACPI/GPIO/TCO
 pci 0000:00:1f.0: quirk: region 0500-053f claimed by ICH6 GPIO
 pci 0000:00:1f.0: ICH7 LPC Generic IO decode 1 PIO at 0680 (mask 007f)
@@ -320,8 +282,6 @@
 libata version 3.00 loaded.
 PCI: Using ACPI for IRQ routing
 PM: Adding info for No Bus:lo
-hpet clockevent registered
-HPET: 4 timers in total, 0 timers will be used for per-cpu timer
 hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0
 hpet0: 4 comparators, 64-bit 14.318180 MHz counter
 Switching to clocksource tsc

Finally, some hwinfo excerpts:

broken machine #1
  BIOS Info: #5
    Vendor: "Intel Corp."
    Version: "SOX5810J.86A.2127.2008.0914.1638"
    Date: "09/14/2008"
  Board Info: #7
    Manufacturer: "Intel Corporation"
    Product: "DX58SO"
    Version: "AAE29331-501"

broken machine #2
  BIOS Info: #5
    Vendor: "Intel Corp."
    Version: "SOX5810J.86A.3435.2009.0210.2311"
    Date: "02/10/2009"
  Board Info: #7
    Manufacturer: "Intel Corporation"
    Product: "DX58SO"
    Version: "AAE29331-503"

working machine #1
  BIOS Info: #5
    Vendor: "Intel Corp."
    Version: "SOX5810J.86A.4405.2009.1020.1419"
    Date: "10/20/2009"
  Board Info: #7
    Manufacturer: "Intel Corporation"
    Product: "DX58SO"
    Version: "AAE29331-701"

I will try to rebuild with cpufreq debugging enabled now, and try to upgrade
BIOS.

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