On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> On 08:39 Sat 29 May, Maxim Levitsky wrote:
> > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax value in the newer
> > > processers.
> >
> > I know that TjMax on my system is 85, and now coretemp reports wrong
> > temperatures.
> > First of all BIOS using stupid tricks actualy reports CPU temperature
> > through ACPI, and assuming it was correct TjMax is 85.
> > It also shuts down the system if I 'lie' to it that cpu temperature is
> > 85C.
>
> From the list at [1], the TjMax(Tjunction) of T5450 is 100C. Does anyone
> here can make a double check?
>
> [1] http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec-codes=SLA4F
This is very interesting.
With TjMax 85C, the CPUs idle temperature is reported at around 45~50C
GPU temperature that is around 60C
BIOS also reports 45~50C.
BIOS hooks an SMI to CPU thermal report, and stores the temperature it
read in ram, then ACPI code reads it, reports and passes to the EC
(embedded controller).
If I write myself 85 to embedded controller, systems shuts down.
(values less that 85, eg 84 don't shut system).
Thats all I know.
Best regards,
Maxim Levitsky
On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
> On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> > On 08:39 Sat 29 May, Maxim Levitsky wrote:
> > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax value in the newer
> > > > processers.
> > >
> > > I know that TjMax on my system is 85, and now coretemp reports wrong
> > > temperatures.
> > > First of all BIOS using stupid tricks actualy reports CPU temperature
> > > through ACPI, and assuming it was correct TjMax is 85.
> > > It also shuts down the system if I 'lie' to it that cpu temperature is
> > > 85C.
> >
> > From the list at [1], the TjMax(Tjunction) of T5450 is 100C. Does anyone
> > here can make a double check?
> >
> > [1] http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec-codes=SLA4F
>
> This is very interesting.
>
> With TjMax 85C, the CPUs idle temperature is reported at around 45~50C
> GPU temperature that is around 60C
>
> BIOS also reports 45~50C.
>
> BIOS hooks an SMI to CPU thermal report, and stores the temperature it
> read in ram, then ACPI code reads it, reports and passes to the EC
> (embedded controller).
>
> If I write myself 85 to embedded controller, systems shuts down.
> (values less that 85, eg 84 don't shut system).
Another clue is that right after resume from ram, after long delay
(~hour) the displayed temperature with TjMax 85 is 33C. Since room
temperature here is around 27C, this seems more plausible that
33 + 15 = 48C
Best regards,
Maxim Levitsky
On Wed, 2010-06-02 at 23:10 +0300, Maxim Levitsky wrote:
> On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
> > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> > > On 08:39 Sat 29 May, Maxim Levitsky wrote:
> > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax value in the newer
> > > > > processers.
> > > >
> > > > I know that TjMax on my system is 85, and now coretemp reports wrong
> > > > temperatures.
> > > > First of all BIOS using stupid tricks actualy reports CPU temperature
> > > > through ACPI, and assuming it was correct TjMax is 85.
> > > > It also shuts down the system if I 'lie' to it that cpu temperature is
> > > > 85C.
> > >
> > > From the list at [1], the TjMax(Tjunction) of T5450 is 100C. Does anyone
> > > here can make a double check?
> > >
> > > [1] http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec-codes=SLA4F
> >
> > This is very interesting.
> >
> > With TjMax 85C, the CPUs idle temperature is reported at around 45~50C
> > GPU temperature that is around 60C
> >
> > BIOS also reports 45~50C.
> >
> > BIOS hooks an SMI to CPU thermal report, and stores the temperature it
> > read in ram, then ACPI code reads it, reports and passes to the EC
> > (embedded controller).
> >
> > If I write myself 85 to embedded controller, systems shuts down.
> > (values less that 85, eg 84 don't shut system).
>
>
> Another clue is that right after resume from ram, after long delay
> (~hour) the displayed temperature with TjMax 85 is 33C. Since room
> temperature here is around 27C, this seems more plausible that
> 33 + 15 = 48C
Any update?
>
>
> Best regards,
> Maxim Levitsky
>
>On Wed, 2010-06-02 at 23:10 +0300, Maxim Levitsky wrote:
>> On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
>> > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
>> > > On 08:39 Sat 29 May, Maxim Levitsky wrote:
>> > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
>> > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax
>value in the newer
>> > > > > processers.
>> > > >
>> > > > I know that TjMax on my system is 85, and now coretemp
>reports wrong
>> > > > temperatures.
>> > > > First of all BIOS using stupid tricks actualy reports
>CPU temperature
>> > > > through ACPI, and assuming it was correct TjMax is 85.
>> > > > It also shuts down the system if I 'lie' to it that
>cpu temperature is
>> > > > 85C.
>> > >
>> > > From the list at [1], the TjMax(Tjunction) of T5450 is
>100C. Does anyone
>> > > here can make a double check?
>> > >
>> > > [1]
>http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec
>-codes=SLA4F
>> >
>> > This is very interesting.
>> >
>> > With TjMax 85C, the CPUs idle temperature is reported at
>around 45~50C
>> > GPU temperature that is around 50C
>> >
>> > BIOS also reports 45~50C.
>> >
>> > BIOS hooks an SMI to CPU thermal report, and stores the
>temperature it
>> > read in ram, then ACPI code reads it, reports and passes to the EC
>> > (embedded controller).
>> >
>> > If I write myself 85 to embedded controller, systems shuts down.
>> > (values less that 85, eg 84 don't shut system).
>>
>>
>> Another clue is that right after resume from ram, after long delay
>> (~hour) the displayed temperature with TjMax 85 is 33C. Since room
>> temperature here is around 27C, this seems more plausible that
>> 33 + 15 = 48C
>
>
>Any update?
I'm occupied by other things, sorry for slow response. But, as said in a
spec, I can't remember which one now, there are too many, the relative
value read from DTS is accurate approaching to TjMax. The accuracy
deteriorates to +-10C at 50C. Any DTS reading below 50C should be
considered to indicate only a temperature below 50C and not a specific
temperature.
So, the value around 50C can't be taken as real chip temperature. I
would like this issue could be confirmed by more users to avoid it as a
particular case. At the meantime, I still looking for a laptop with T5450,
this may take some time.
Thanks
Huaxu -
On Sun, 2010-06-13 at 10:27 +0800, Wan, Huaxu wrote:
> >On Wed, 2010-06-02 at 23:10 +0300, Maxim Levitsky wrote:
> >> On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
> >> > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> >> > > On 08:39 Sat 29 May, Maxim Levitsky wrote:
> >> > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> >> > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax
> >value in the newer
> >> > > > > processers.
> >> > > >
> >> > > > I know that TjMax on my system is 85, and now coretemp
> >reports wrong
> >> > > > temperatures.
> >> > > > First of all BIOS using stupid tricks actualy reports
> >CPU temperature
> >> > > > through ACPI, and assuming it was correct TjMax is 85.
> >> > > > It also shuts down the system if I 'lie' to it that
> >cpu temperature is
> >> > > > 85C.
> >> > >
> >> > > From the list at [1], the TjMax(Tjunction) of T5450 is
> >100C. Does anyone
> >> > > here can make a double check?
> >> > >
> >> > > [1]
> >http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec
> >-codes=SLA4F
> >> >
> >> > This is very interesting.
> >> >
> >> > With TjMax 85C, the CPUs idle temperature is reported at
> >around 45~50C
> >> > GPU temperature that is around 50C
> >> >
> >> > BIOS also reports 45~50C.
> >> >
> >> > BIOS hooks an SMI to CPU thermal report, and stores the
> >temperature it
> >> > read in ram, then ACPI code reads it, reports and passes to the EC
> >> > (embedded controller).
> >> >
> >> > If I write myself 85 to embedded controller, systems shuts down.
> >> > (values less that 85, eg 84 don't shut system).
> >>
> >>
> >> Another clue is that right after resume from ram, after long delay
> >> (~hour) the displayed temperature with TjMax 85 is 33C. Since room
> >> temperature here is around 27C, this seems more plausible that
> >> 33 + 15 = 48C
> >
> >
> >Any update?
>
> I'm occupied by other things, sorry for slow response. But, as said in a
> spec, I can't remember which one now, there are too many, the relative
> value read from DTS is accurate approaching to TjMax. The accuracy
> deteriorates to +-10C at 50C. Any DTS reading below 50C should be
> considered to indicate only a temperature below 50C and not a specific
> temperature.
>
> So, the value around 50C can't be taken as real chip temperature. I
> would like this issue could be confirmed by more users to avoid it as a
> particular case. At the meantime, I still looking for a laptop with T5450,
> this may take some time.
>
> Thanks
> Huaxu
Any update?
Best regards,
Maxim Levitsky
CC Fenghua.
Could you found a Laptop with T5450 at hand? I can't found anywhere.
-Huaxu
On Mon, 2010-07-26 at 11:16 +0300, Maxim Levitsky wrote:
> On Sun, 2010-06-13 at 10:27 +0800, Wan, Huaxu wrote:
> > >On Wed, 2010-06-02 at 23:10 +0300, Maxim Levitsky wrote:
> > >> On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
> > >> > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> > >> > > On 08:39 Sat 29 May, Maxim Levitsky wrote:
> > >> > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> > >> > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax
> > >value in the newer
> > >> > > > > processers.
> > >> > > >
> > >> > > > I know that TjMax on my system is 85, and now coretemp
> > >reports wrong
> > >> > > > temperatures.
> > >> > > > First of all BIOS using stupid tricks actualy reports
> > >CPU temperature
> > >> > > > through ACPI, and assuming it was correct TjMax is 85.
> > >> > > > It also shuts down the system if I 'lie' to it that
> > >cpu temperature is
> > >> > > > 85C.
> > >> > >
> > >> > > From the list at [1], the TjMax(Tjunction) of T5450 is
> > >100C. Does anyone
> > >> > > here can make a double check?
> > >> > >
> > >> > > [1]
> > >http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec
> > >-codes=SLA4F
> > >> >
> > >> > This is very interesting.
> > >> >
> > >> > With TjMax 85C, the CPUs idle temperature is reported at
> > >around 45~50C
> > >> > GPU temperature that is around 50C
> > >> >
> > >> > BIOS also reports 45~50C.
> > >> >
> > >> > BIOS hooks an SMI to CPU thermal report, and stores the
> > >temperature it
> > >> > read in ram, then ACPI code reads it, reports and passes to the EC
> > >> > (embedded controller).
> > >> >
> > >> > If I write myself 85 to embedded controller, systems shuts down.
> > >> > (values less that 85, eg 84 don't shut system).
> > >>
> > >>
> > >> Another clue is that right after resume from ram, after long delay
> > >> (~hour) the displayed temperature with TjMax 85 is 33C. Since room
> > >> temperature here is around 27C, this seems more plausible that
> > >> 33 + 15 = 48C
> > >
> > >
> > >Any update?
> >
> > I'm occupied by other things, sorry for slow response. But, as said in a
> > spec, I can't remember which one now, there are too many, the relative
> > value read from DTS is accurate approaching to TjMax. The accuracy
> > deteriorates to +-10C at 50C. Any DTS reading below 50C should be
> > considered to indicate only a temperature below 50C and not a specific
> > temperature.
> >
> > So, the value around 50C can't be taken as real chip temperature. I
> > would like this issue could be confirmed by more users to avoid it as a
> > particular case. At the meantime, I still looking for a laptop with T5450,
> > this may take some time.
> >
> > Thanks
> > Huaxu
>
> Any update?
>
> Best regards,
> Maxim Levitsky
>
On Sun, Aug 29, 2010 at 06:42:36PM -0700, Huaxu Wan wrote:
> On Mon, 2010-07-26 at 11:16 +0300, Maxim Levitsky wrote:
> > On Sun, 2010-06-13 at 10:27 +0800, Wan, Huaxu wrote:
> > > >On Wed, 2010-06-02 at 23:10 +0300, Maxim Levitsky wrote:
> > > >> On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote:
> > > >> > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote:
> > > >> > > On 08:39 Sat 29 May, Maxim Levitsky wrote:
> > > >> > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote:
> > > >> > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax
> > > >value in the newer
> > > >> > > > > processers.
> > > >> > > >
> > > >> > > > I know that TjMax on my system is 85, and now coretemp
> > > >reports wrong
> > > >> > > > temperatures.
> > > >> > > > First of all BIOS using stupid tricks actualy reports
> > > >CPU temperature
> > > >> > > > through ACPI, and assuming it was correct TjMax is 85.
> > > >> > > > It also shuts down the system if I 'lie' to it that
> > > >cpu temperature is
> > > >> > > > 85C.
> > > >> > >
> > > >> > > From the list at [1], the TjMax(Tjunction) of T5450 is
> > > >100C. Does anyone
> > > >> > > here can make a double check?
> > > >> > >
> > > >> > > [1]
> > > >http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec
> > > >-codes=SLA4F
> > > >> >
> > > >> > This is very interesting.
> > > >> >
> > > >> > With TjMax 85C, the CPUs idle temperature is reported at
> > > >around 45~50C
> > > >> > GPU temperature that is around 50C
> > > >> >
> > > >> > BIOS also reports 45~50C.
> > > >> >
> > > >> > BIOS hooks an SMI to CPU thermal report, and stores the
> > > >temperature it
> > > >> > read in ram, then ACPI code reads it, reports and passes to the EC
> > > >> > (embedded controller).
> > > >> >
> > > >> > If I write myself 85 to embedded controller, systems shuts down.
> > > >> > (values less that 85, eg 84 don't shut system).
> > > >>
> > > >>
> > > >> Another clue is that right after resume from ram, after long delay
> > > >> (~hour) the displayed temperature with TjMax 85 is 33C. Since room
> > > >> temperature here is around 27C, this seems more plausible that
> > > >> 33 + 15 = 48C
> > > >
> > > >
> > > >Any update?
> > >
> > > I'm occupied by other things, sorry for slow response. But, as said in a
> > > spec, I can't remember which one now, there are too many, the relative
> > > value read from DTS is accurate approaching to TjMax. The accuracy
> > > deteriorates to +-10C at 50C. Any DTS reading below 50C should be
> > > considered to indicate only a temperature below 50C and not a specific
> > > temperature.
> > >
> > > So, the value around 50C can't be taken as real chip temperature. I
> > > would like this issue could be confirmed by more users to avoid it as a
> > > particular case. At the meantime, I still looking for a laptop with T5450,
> > > this may take some time.
Hi, Maxim,
Could you send out thermal zone info under /proc/acpi/thermal_zone/TZ*?
Thanks.
-Fenghua