[ACPI] Fan and Temperature problem

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Hi all,
I have another problem with my laptop, an Acer Extensa 3001. When I run lin=
ux=20
the fan runs at full speed all the time, and=20
cat /proc/acpi/thermal_zone/THRM0/temperature reports around 90C=B0, no mat=
ter=20
what the load is. The air that comes out of the fan exhaust is quite cool,=
=20
however, which makes me think it isn't really running at that temperature. =
In=20
windows the fan only turns on when there is a lot of activity, so I don't=20
think it's a hardware problem. Fan, cpu and thermal zone are all properly=20
recognised. Is it possibel that the temperature is somehow interpreted=20
incorrectly by the kernel and makes the system think it has to cool a lot? =
Or=20
is this done without any os interference? Any help wpould be greatly=20
appreciated!

Thanks
Johannes

dmesg | grep ACPI
 BIOS-e820: 000000001fee0000 - 000000001feec000 (ACPI data)
 BIOS-e820: 000000001feec000 - 000000001ff00000 (ACPI NVS)
ACPI: RSDP (v000 ACER                                      ) @ 0x000f62c0
ACPI: RSDT (v001 ACER   Kestrel  0x20020707  LTP 0x00000000) @ 0x1fee6235
ACPI: FADT (v001 ACER   Kestrel  0x20020707 PTL  0x00000050) @ 0x1feebf2c
ACPI: HPET (v001 ACER   Kestrel  0x20020707 PTL  0x00000000) @ 0x1feebfa0
ACPI: BOOT (v001 ACER   Kestrel  0x20020707  LTP 0x00000001) @ 0x1feebfd8
ACPI: DSDT (v001 ACER   Kestrel  0x20020707 MSFT 0x0100000e) @ 0x00000000
ACPI: PM-Timer IO Port: 0x1008
ACPI: HPET id: 0x8086a201 base: 0x0
ACPI: Subsystem revision 20040326
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 Routing Table [\_SB_.PCI0.AGP_._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIB._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs *6)
ACPI: PCI Interrupt Link [LNKB] (IRQs *10)
ACPI: PCI Interrupt Link [LNKC] (IRQs *6)
ACPI: PCI Interrupt Link [LNKD] (IRQs *6)
ACPI: PCI Interrupt Link [LNKE] (IRQs *10)
ACPI: PCI Interrupt Link [LNKF] (IRQs 10) *0, disabled.
ACPI: PCI Interrupt Link [LNKG] (IRQs 6) *0, disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs *10)
ACPI: Embedded Controller [EC0] (gpe 29)
ACPI: Power Resource [PFN0] (off)
ACPI: Power Resource [PFN1] (off)
PCI: Using ACPI for IRQ routing
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 6
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 6
ACPI: PCI interrupt 0000:00:1d.1[B] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 6
ACPI: PCI interrupt 0000:00:1d.2[C] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 10
ACPI: PCI interrupt 0000:00:1d.7[D] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1f.1[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
ACPI: PCI interrupt 0000:00:1f.3[B] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1f.5[B] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1f.6[B] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:02:02.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:02:04.0[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 10
ACPI: PCI interrupt 0000:02:06.0[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:02:06.2[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:02:06.3[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: Power Button (FF) [PWRF]
ACPI: Lid Switch [LID]
ACPI: Sleep Button (CM) [SLPB]
ACPI: Fan [FAN0] (off)
ACPI: Fan [FAN1] (off)
ACPI: Processor [CPU0] (supports C1 C2 C3, 8 throttling states)
ACPI: Thermal Zone [THRM] (90 C)
ACPI: PCI interrupt 0000:00:1f.6[B] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1f.1[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:02:06.2[A] -> GSI 10 (level, low) -> IRQ 10
cpufreq: CPU0 - ACPI performance management activated.
ACPI: (supports S0 S3 S4 S5)
ACPI: PCI interrupt 0000:02:02.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:02:06.0[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1d.7[D] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:00:1d.1[B] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:00:1d.2[C] -> GSI 6 (level, low) -> IRQ 6
ACPI: PCI interrupt 0000:00:1f.5[B] -> GSI 10 (level, low) -> IRQ 10