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Old 06-12-2011, 05:26 PM
Pasi Kärkkäinen
 
Default Laptop CPU overheating in Fedora, temperature +30 celsius higher than in Windows

On Sun, Jun 12, 2011 at 06:20:55PM +0100, José Matos wrote:
> On Sunday 12 June 2011 16:56:33 Pasi Kärkkäinen wrote:
> > Hello list,
> >
> > Any tips how to debug why laptop CPU temperature is around 30 degrees
> > celsius higher on Fedora 14 or Fedora 15 compared to Windows 7 ? Both
> > Linux and Windows were idle when measuring..
> >
> > I tried both Fedora 14 (Linux 2.6.35) and Fedora 15 (Linux 2.6.38).
> > Laptop specs:
> > - HP Elitebook 8530p.
> > - CPU: Mobile Intel Core 2 Duo T9600 (Penryn).
> >
> > Results:
> > - Windows: CPU is 57 - 65 celsius when idle.
> > - Fedora/Linux: CPU is 85 - 95 celsius when idle.
> >
> > The laptop definitely feels much more hot when in Linux
> > and sometimes shuts down with thermal overheating warning.
> > That overheating problem never happens in Windows.
> >
> > Checking "powertop" in Linux shows the CPU is mostly running
> > with the lowest MHz available. Not much "idle" time though..
> >
> > I was using "Core Temp" in Windows and /sys ACPI interface in Linux:
> >
> > # cat /sys/bus/acpi/devices/LNXTHERM:03/thermal_zone/temp
> > 86000
> >
> > # cat /sys/bus/acpi/devices/LNXTHERM:03/path
> > \_TZ_.CPUZ
> >
> > "acpi -t" also shows the same CPU temperature.
> > Fedora 15 Linux 2.6.38 dmesg here:
> > http://pasik.reaktio.net/fedora/f15/cputemp/dmesg-laptop-f15.txt
> >
> >
> > Any ideas how to track what's causing that? All suggestions welcome!
> > Thanks,
> >
> > -- Pasi
>
> What is the graphics card?
>

It's ATI radeon RV635. Do you have the same graphics card?


> I am running this from a laptop of the same model and I see:
>
> $ sensors
> acpitz-virtual-0
> Adapter: Virtual device
> temp1: +30.0°C (crit = +115.0°C)
> temp2: +50.0°C (crit = +105.0°C)
> temp3: +26.6°C (crit = +112.0°C)
> temp4: +58.0°C (crit = +112.0°C)
> temp5: +46.0°C (crit = +90.0°C)
> temp6: +16.0°C (crit = +112.0°C)
>

So your CPU temp is what it should be..

> radeon-pci-0100
> Adapter: PCI adapter
> temp1: +58.0°C
>
> coretemp-isa-0000
> Adapter: ISA adapter
> Core 0: +51.0°C (high = +105.0°C, crit = +105.0°C)
>
> coretemp-isa-0001
> Adapter: ISA adapter
> Core 1: +50.0°C (high = +105.0°C, crit = +105.0°C)
>
> The only thing I have done in order to cool down graphics card was to run:
>
> # echo mid > /sys/class/drm/card0/device/power_profile
>

Oh, I wasn't aware of this. I'll try and see if that makes a difference.


> instead of the default value auto (that alternates between mid (middle) and
> high) for the graphics card.
>
> Definitivily I saw an improvement between F14 and F15.
>
> Running the graphics card power profile as low brings the temperature even
> lower (at the expense of some slower window updates).
>
> FWIW I never had a problem with overheating.
>

Ok, good to know.

> Regarding the comparison with windows (win.. what?) ;-) this computer came
> with freedos installed so no such luck here. :-D
>



Thanks for the reply!

-- Pasi

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Old 06-13-2011, 07:57 AM
Pasi Kärkkäinen
 
Default Laptop CPU overheating in Fedora, temperature +30 celsius higher than in Windows

On Sun, Jun 12, 2011 at 07:24:38PM +0100, José Matos wrote:
> On Sunday 12 June 2011 18:26:25 Pasi Kärkkäinen wrote:
> > > What is the graphics card?
> > >
> > >
> >
> > It's ATI radeon RV635. Do you have the same graphics card?
>
> I think so (but I think that are mixing the references :-) ):
>
> # lspci | grep ATI
> 01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD
> 3650
> 01:00.1 Audio device: ATI Technologies Inc RV635 Audio device [Radeon HD 3600
> Series]
>
> so I think that the 365 here refers to the digital sound part.
>

Doh, of course

> > Thanks for the reply!
>
> Glad to help. :-)
>

-- Pasi

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Old 06-13-2011, 07:59 AM
Pasi Kärkkäinen
 
Default Laptop CPU overheating in Fedora, temperature +30 celsius higher than in Windows

On Sun, Jun 12, 2011 at 08:54:40PM +0200, Andreas Tunek wrote:
> 2011/6/12 José Matos <jamatos@fc.up.pt>:
> > On Sunday 12 June 2011 18:26:25 Pasi Kärkkäinen wrote:
> >> > What is the graphics card?
> >> >
> >> >
> >>
> >> It's ATI radeon RV635. Do you have the same graphics card?
> >
> > I think so (but I think that are mixing the references :-) ):
> >
> > # lspci | grep ATI
> > 01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD
> > 3650
> > 01:00.1 Audio device: ATI Technologies Inc RV635 Audio device [Radeon HD 3600
> > Series]
> >
> > so I think that the 365 here refers to the digital sound part.
> >
> >> Thanks for the reply!
> >
> > Glad to help. :-)
> >
> >> -- Pasi
> >
> > --
> > José Abílio
> > --
> > devel mailing list
> > devel@lists.fedoraproject.org
> > https://admin.fedoraproject.org/mailman/listinfo/devel
> >
>
> You are probably hitting https://bugzilla.redhat.com/show_bug.cgi?id=702953
>

That could be it..

I'll try if "echo mid > /sys/class/drm/card0/device/power_profile" helps.

Thanks!

-- Pasi

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Old 06-17-2011, 07:47 PM
Adam Williamson
 
Default Laptop CPU overheating in Fedora, temperature +30 celsius higher than in Windows

On Sun, 2011-06-12 at 19:24 +0100, José Matos wrote:

> so I think that the 365 here refers to the digital sound part.

Nope, it's the graphics adapter. The audio device here is not actually
your main sound card, but the video adapter's HDMI output; most modern
video adapters are capable of HDMI output and can route sound over it
(as is required by the HDMI standard). RV635 is the most correct name
for the GPU in question. Graphics adapter naming is a hideously messy
area which it's best not to look at too closely (it's like sausages...),
but if you must:

https://secure.wikimedia.org/wikipedia/en/wiki/Radeon_R600

is a good entry point.

Basically, there is a unique name in the 'RV635' style for each GPU
which has actual silicon differences from any other GPU; there are then
consumer names, like Radeon HD 3650. There can be more than one consumer
part based on the same GPU where the only difference is some kind of
configuration issue, like the amount of memory or the core frequency the
adapter is clocked at by default. For example, in this generation, the
Radeon HD 3450 and Radeon HD 3470 are both based on the exact same GPU,
the RV620 part; as you can see from
http://images.bit-tech.net/content_images/2008/01/ati_radeon_hd_3450_3470_and_3670/6.jpg , the differences are in stock clock speed and the type of memory included.

The consumer names sort of follow a scheme, but it's a very loose one
that gets changed quite often and which is often breached anyway. The
GPU part names are rather more consistent, and driver authors often
prefer referring to those over the consumer card names. Ever since the
first Radeon cards, the ATI/AMD GPU part naming scheme has been
consistent, from R1xx (first Radeon adapters) through to R9xx (current
generation), going up 100 with each generation. Although this is
obviously far too sensible, so for the last few generations AMD has
insisted on using a series of stupid, arbitrary and unmemorable
geographical codenames, which seem to have taken precedence over 'R900'
for the latest generation.

NVIDIA's schemes are all over the map for both GPU part names and
consumer names. It's a freaking nightmare. Just see
https://secure.wikimedia.org/wikipedia/en/wiki/Comparison_of_Nvidia_graphics_processing_units#GeF orce_300_Series ...
--
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org
http://www.happyassassin.net

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