Re: [lm-sensors] module c7temp shows voltage, but no temperature

Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Justin Chudgar]

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As I understand, VIA has not released documentation to the lm-sensors 
developers on the latest revisions of the C7. I  believe that it is helpful if 
you post the output of cpuid with your info, but I forget which switch(es) to 
use.

As you can see, I CC'd the list with you info. Maybe someone will know 
something that I  do not. Sorry I was not of more help.
-- 

Justin Chudgar
Information Technology Consultant
5040 Saddlehorn Rd, Weed, CA 96084
530-938-9692 (Home Office) | 530-340-5632 (Mobile)

On Sunday 22 February 2009 01:57:06 am you wrote:
> Hi Justin, Juerg,
>
> I just found the c7temp module, and the ticket in the lm-sensors wiki.
> Looks like I'm facing the same problem...
>
> My system is a brand-new VIA EPIA M700 with a 1.5GHz C7 CPU.
>
> As this board is actively cooled, but I want to remove the fan, it would
> be quite important to me to get some CPU temperatures. The funny thing
> is that I don't get temperatures anywhere, neither from any of the
> lm-sensors modules (the board has an additiaonal w83627hf, I'm getting
> some voltages, but no temperatures), nor from the BIOS setup. There is a
>  menu item called "PC Health" but no temperatures inside (except a
> "system temperature", which shows no value because one would need an
> external tmep sensor connected to a pin header)
>
>
> So my question is: Is there some progress on this issue? Can I be of any
> help here?
>
>
>
> Thanks a lot, Michael


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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Michael Reinelt]

Hi Justin,

> As I understand, VIA has not released documentation to the lm-sensors
> developers on the latest revisions of the C7. 
too bad...

> I believe that it is
> helpful if you post the output of cpuid with your info, but I forget
> which switch(es) to use.

Well, as far as I con see, my version of cpuid doesn't have any switches
at all :-)

so here's the output:

artus.reinelt.local:~ # cpuid
 eax in    eax      ebx      ecx      edx
00000000 00000001 746e6543 736c7561 48727561
00000001 000006d0 00000800 00004181 a7c9bbff
80000000 80000006 00000000 00000000 00000000
80000001 00000000 00000000 00000000 00100000
80000002 20202020 20202020 20202020 20202020
80000003 20202020 56202020 43204149 72502037
80000004 7365636f 20726f73 30303531 007a484d
80000005 00000000 08800880 40040140 40040140
80000006 00000000 00000000 0080a140 00000000

Vendor ID: "CentaurHauls"; CPUID level 1

Unknown vendor


and the output of cat /proc/cpuinfo:

artus.reinelt.local:~ # cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 13
model name      : VIA C7 Processor 1500MHz
stepping        : 0
cpu MHz         : 800.000
cache size      : 128 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
cmov pat clflush acpi mmx fxsr sse sse2 tm nx pni est tm2 xtpr rng
rng_en ace ace_en ace2 ace2_en phe phe_en pmm pmm_en
bogomips        : 1599.86
clflush size    : 64
power management:


HTH, Michael

-- 
Michael Reinelt <michael@reinelt.co.at>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Juerg Haefliger]

Michael,

On Sun, Feb 22, 2009 at 12:27 PM, Michael Reinelt <michael@reinelt.co.at> wrote:
> Hi Justin,
>
>> As I understand, VIA has not released documentation to the lm-sensors
>> developers on the latest revisions of the C7.
> too bad...
>
>> I believe that it is
>> helpful if you post the output of cpuid with your info, but I forget
>> which switch(es) to use.
>
> Well, as far as I con see, my version of cpuid doesn't have any switches
> at all :-)
>
> so here's the output:
>
> artus.reinelt.local:~ # cpuid
>  eax in    eax      ebx      ecx      edx
> 00000000 00000001 746e6543 736c7561 48727561
> 00000001 000006d0 00000800 00004181 a7c9bbff
> 80000000 80000006 00000000 00000000 00000000
> 80000001 00000000 00000000 00000000 00100000
> 80000002 20202020 20202020 20202020 20202020
> 80000003 20202020 56202020 43204149 72502037
> 80000004 7365636f 20726f73 30303531 007a484d
> 80000005 00000000 08800880 40040140 40040140
> 80000006 00000000 00000000 0080a140 00000000
>
> Vendor ID: "CentaurHauls"; CPUID level 1
>
> Unknown vendor


You need a newer cpuid to display some additional data:
http://freshmeat.net/redir/cpuid_2/63002/url_tgz/cpuid-20060917.src.tar.gz

...juerg

>
> and the output of cat /proc/cpuinfo:
>
> artus.reinelt.local:~ # cat /proc/cpuinfo
> processor       : 0
> vendor_id       : CentaurHauls
> cpu family      : 6
> model           : 13
> model name      : VIA C7 Processor 1500MHz
> stepping        : 0
> cpu MHz         : 800.000
> cache size      : 128 KB
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> cmov pat clflush acpi mmx fxsr sse sse2 tm nx pni est tm2 xtpr rng
> rng_en ace ace_en ace2 ace2_en phe phe_en pmm pmm_en
> bogomips        : 1599.86
> clflush size    : 64
> power management:
>
>
> HTH, Michael
>
> --
> Michael Reinelt <michael@reinelt.co.at>
> http://home.pages.at/reinelt
> GPG-Key 0xDF13BA50
> ICQ #288386781
>
> _______________________________________________
> lm-sensors mailing list
> lm-sensors@lm-sensors.org
> http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
>

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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Michael Reinelt]

Hi Juerg,

> You need a newer cpuid to display some additional data:
> http://freshmeat.net/redir/cpuid_2/63002/url_tgz/cpuid-20060917.src.tar.gz

Thanks for the hint! although the link you provided did not work, I
found the package somewhere on the net, and here's the output:


CPU:
   vendor_id = "CentaurHauls"
   version information (1/eax):
      processor type  = primary processor (0)
      family          = Intel Pentium Pro/II/III/Celeron, AMD
Athlon/Duron, Cyrix M2, VIA C3 (6)
      model           = 0xd (13)
      stepping id     = 0x0 (0)
      extended family = 0x0 (0)
      extended model  = 0x0 (0)
      (simple synth)  = VIA C3 / C3-M / C7 / C7-M / Eden ESP
7000/8000/10000 (unknown model)
   miscellaneous (1/ebx):
      process local APIC physical ID = 0x0 (0)
      cpu count                      = 0x0 (0)
      CLFLUSH line size              = 0x8 (8)
      brand index                    = 0x0 (0)
   brand id = 0x00 (0): unknown
   feature information (1/edx):
      x87 FPU on chip                        = true
      virtual-8086 mode enhancement          = true
      debugging extensions                   = true
      page size extensions                   = true
      time stamp counter                     = true
      RDMSR and WRMSR support                = true
      physical address extensions            = true
      machine check exception                = true
      CMPXCHG8B inst.                        = true
      APIC on chip                           = true
      SYSENTER and SYSEXIT                   = true
      memory type range registers            = true
      PTE global bit                         = true
      machine check architecture             = false
      conditional move/compare instruction   = true
      page attribute table                   = true
      page size extension                    = false
      processor serial number                = false
      CLFLUSH instruction                    = true
      debug store                            = false
      thermal monitor and clock ctrl         = true
      MMX Technology                         = true
      FXSAVE/FXRSTOR                         = true
      SSE extensions                         = true
      SSE2 extensions                        = true
      self snoop                             = false
      hyper-threading / multi-core supported = false
      therm. monitor                         = true
      IA64                                   = false
      pending break event                    = true
   feature information (1/ecx):
      PNI/SSE3: Prescott New Instructions    = true
      MONITOR/MWAIT                          = false
      CPL-qualified debug store              = false
      VMX: virtual machine extensions        = false
      Enhanced Intel SpeedStep Technology    = true
      thermal monitor 2                      = true
      context ID: adaptive or shared L1 data = false
      cmpxchg16b available                   = false
      xTPR disable                           = true
   extended processor signature (0x80000001/eax):
      generation     = 0x0 (0)
      model          = 0x0 (0)
      stepping       = 0x0 (0)
      (simple synth) = unknown
   extended feature flags (0x80000001/edx):
      x87 FPU on chip                       = false
      virtual-8086 mode enhancement         = false
      debugging extensions                  = false
      page size extensions                  = false
      time stamp counter                    = false
      RDMSR and WRMSR support               = false
      physical address extensions           = false
      machine check exception               = false
      CMPXCHG8B inst.                       = false
      APIC on chip                          = false
      SYSCALL and SYSRET instructions       = false
      memory type range registers           = false
      global paging extension               = false
      machine check architecture            = false
      conditional move/compare instruction  = false
      page attribute table                  = false
      page size extension                   = false
      multiprocessing capable               = false
      AMD multimedia instruction extensions = false
      MMX Technology                        = false
      extended MMX                          = false
      SSE extensions                        = false
      AA-64                                 = false
      3DNow! instruction extensions         = false
      3DNow! instructions                   = false
   brand = "                       VIA C7 Processor 1500MHz"
   L1 TLB/cache information: 2M/4M pages & L1 TLB (0x80000005/eax):
      instruction # entries     = 0x0 (0)
      instruction associativity = 0x0 (0)
      data # entries            = 0x0 (0)
      data associativity        = 0x0 (0)
   L1 TLB/cache information: 4K pages & L1 TLB (0x80000005/ebx):
      instruction # entries     = 0x80 (128)
      instruction associativity = 0x8 (8)
      data # entries            = 0x80 (128)
      data associativity        = 0x8 (8)
   L1 data cache information (0x80000005/ecx):
      line size (bytes) = 0x40 (64)
      lines per tag     = 0x1 (1)
      associativity     = 0x4 (4)
      size (Kb)         = 0x40 (64)
   L1 instruction cache information (0x80000005/ecx):
      line size (bytes) = 0x40 (64)
      lines per tag     = 0x1 (1)
      associativity     = 0x4 (4)
      size (Kb)         = 0x40 (64)
   L2 TLB/cache information: 2M/4M pages & L2 TLB (0x80000006/eax):
      instruction # entries     = 0x0 (0)
      instruction associativity = L2 off (0)
      data # entries            = 0x0 (0)
      data associativity        = L2 off (0)
   L2 TLB/cache information: 4K pages & L2 TLB (0x80000006/ebx):
      instruction # entries     = 0x0 (0)
      instruction associativity = L2 off (0)
      data # entries            = 0x0 (0)
      data associativity        = L2 off (0)
   L2 unified cache information (0x80000006/ecx):
      line size (bytes) = 0x40 (64)
      lines per tag     = 0x1 (1)
      associativity     = 0xa (10)
      size (Kb)         = 0x80 (128)
   0xc0000001: eax=0x00000000
   extended feature flags (0xc0000001/edx):
      alternate instruction set                 = false
      alternate instruction set enabled         = false
      random number generator                   = true
      random number generator enabled           = true
      LongHaul MSR 0000_110Ah                   = false
      FEMMS                                     = false
      advanced cryptography engine (ACE)        = true
      advanced cryptography engine (ACE)enabled = true
   0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13 edx=0x42040000
   0xc0000003: eax=0x57762abe ebx=0xce237d7f ecx=0x5ee56564 edx=0xe8619e36
   (multi-processing synth): none
   (synth) = VIA C3 / C3-M / C7 / C7-M / Eden ESP 7000/8000/10000
(unknown model)

-- 
Michael Reinelt <michael@reinelt.co.at>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Rudolf Marek]

Hi all
>> As I understand, VIA has not released documentation to the lm-sensors
>> developers on the latest revisions of the C7. 

Please tell me exactly what you need. I can ask.
(I will be on holiday for the rest of the week but then I can help)

Rudolf


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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Juerg Haefliger]

Michael,

Please also run cpuid -r.

Thanks
...juerg


On Mon, Feb 23, 2009 at 8:38 AM, Michael Reinelt <michael@reinelt.co.at> wrote:
> Hi Juerg,
>
>> You need a newer cpuid to display some additional data:
>> http://freshmeat.net/redir/cpuid_2/63002/url_tgz/cpuid-20060917.src.tar.gz
>
> Thanks for the hint! although the link you provided did not work, I
> found the package somewhere on the net, and here's the output:
>
>
> CPU:
>   vendor_id = "CentaurHauls"
>   version information (1/eax):
>      processor type  = primary processor (0)
>      family          = Intel Pentium Pro/II/III/Celeron, AMD
> Athlon/Duron, Cyrix M2, VIA C3 (6)
>      model           = 0xd (13)
>      stepping id     = 0x0 (0)
>      extended family = 0x0 (0)
>      extended model  = 0x0 (0)
>      (simple synth)  = VIA C3 / C3-M / C7 / C7-M / Eden ESP
> 7000/8000/10000 (unknown model)
>   miscellaneous (1/ebx):
>      process local APIC physical ID = 0x0 (0)
>      cpu count                      = 0x0 (0)
>      CLFLUSH line size              = 0x8 (8)
>      brand index                    = 0x0 (0)
>   brand id = 0x00 (0): unknown
>   feature information (1/edx):
>      x87 FPU on chip                        = true
>      virtual-8086 mode enhancement          = true
>      debugging extensions                   = true
>      page size extensions                   = true
>      time stamp counter                     = true
>      RDMSR and WRMSR support                = true
>      physical address extensions            = true
>      machine check exception                = true
>      CMPXCHG8B inst.                        = true
>      APIC on chip                           = true
>      SYSENTER and SYSEXIT                   = true
>      memory type range registers            = true
>      PTE global bit                         = true
>      machine check architecture             = false
>      conditional move/compare instruction   = true
>      page attribute table                   = true
>      page size extension                    = false
>      processor serial number                = false
>      CLFLUSH instruction                    = true
>      debug store                            = false
>      thermal monitor and clock ctrl         = true
>      MMX Technology                         = true
>      FXSAVE/FXRSTOR                         = true
>      SSE extensions                         = true
>      SSE2 extensions                        = true
>      self snoop                             = false
>      hyper-threading / multi-core supported = false
>      therm. monitor                         = true
>      IA64                                   = false
>      pending break event                    = true
>   feature information (1/ecx):
>      PNI/SSE3: Prescott New Instructions    = true
>      MONITOR/MWAIT                          = false
>      CPL-qualified debug store              = false
>      VMX: virtual machine extensions        = false
>      Enhanced Intel SpeedStep Technology    = true
>      thermal monitor 2                      = true
>      context ID: adaptive or shared L1 data = false
>      cmpxchg16b available                   = false
>      xTPR disable                           = true
>   extended processor signature (0x80000001/eax):
>      generation     = 0x0 (0)
>      model          = 0x0 (0)
>      stepping       = 0x0 (0)
>      (simple synth) = unknown
>   extended feature flags (0x80000001/edx):
>      x87 FPU on chip                       = false
>      virtual-8086 mode enhancement         = false
>      debugging extensions                  = false
>      page size extensions                  = false
>      time stamp counter                    = false
>      RDMSR and WRMSR support               = false
>      physical address extensions           = false
>      machine check exception               = false
>      CMPXCHG8B inst.                       = false
>      APIC on chip                          = false
>      SYSCALL and SYSRET instructions       = false
>      memory type range registers           = false
>      global paging extension               = false
>      machine check architecture            = false
>      conditional move/compare instruction  = false
>      page attribute table                  = false
>      page size extension                   = false
>      multiprocessing capable               = false
>      AMD multimedia instruction extensions = false
>      MMX Technology                        = false
>      extended MMX                          = false
>      SSE extensions                        = false
>      AA-64                                 = false
>      3DNow! instruction extensions         = false
>      3DNow! instructions                   = false
>   brand = "                       VIA C7 Processor 1500MHz"
>   L1 TLB/cache information: 2M/4M pages & L1 TLB (0x80000005/eax):
>      instruction # entries     = 0x0 (0)
>      instruction associativity = 0x0 (0)
>      data # entries            = 0x0 (0)
>      data associativity        = 0x0 (0)
>   L1 TLB/cache information: 4K pages & L1 TLB (0x80000005/ebx):
>      instruction # entries     = 0x80 (128)
>      instruction associativity = 0x8 (8)
>      data # entries            = 0x80 (128)
>      data associativity        = 0x8 (8)
>   L1 data cache information (0x80000005/ecx):
>      line size (bytes) = 0x40 (64)
>      lines per tag     = 0x1 (1)
>      associativity     = 0x4 (4)
>      size (Kb)         = 0x40 (64)
>   L1 instruction cache information (0x80000005/ecx):
>      line size (bytes) = 0x40 (64)
>      lines per tag     = 0x1 (1)
>      associativity     = 0x4 (4)
>      size (Kb)         = 0x40 (64)
>   L2 TLB/cache information: 2M/4M pages & L2 TLB (0x80000006/eax):
>      instruction # entries     = 0x0 (0)
>      instruction associativity = L2 off (0)
>      data # entries            = 0x0 (0)
>      data associativity        = L2 off (0)
>   L2 TLB/cache information: 4K pages & L2 TLB (0x80000006/ebx):
>      instruction # entries     = 0x0 (0)
>      instruction associativity = L2 off (0)
>      data # entries            = 0x0 (0)
>      data associativity        = L2 off (0)
>   L2 unified cache information (0x80000006/ecx):
>      line size (bytes) = 0x40 (64)
>      lines per tag     = 0x1 (1)
>      associativity     = 0xa (10)
>      size (Kb)         = 0x80 (128)
>   0xc0000001: eax=0x00000000
>   extended feature flags (0xc0000001/edx):
>      alternate instruction set                 = false
>      alternate instruction set enabled         = false
>      random number generator                   = true
>      random number generator enabled           = true
>      LongHaul MSR 0000_110Ah                   = false
>      FEMMS                                     = false
>      advanced cryptography engine (ACE)        = true
>      advanced cryptography engine (ACE)enabled = true
>   0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13 edx=0x42040000
>   0xc0000003: eax=0x57762abe ebx=0xce237d7f ecx=0x5ee56564 edx=0xe8619e36
>   (multi-processing synth): none
>   (synth) = VIA C3 / C3-M / C7 / C7-M / Eden ESP 7000/8000/10000
> (unknown model)
>
> --
> Michael Reinelt <michael@reinelt.co.at>
> http://home.pages.at/reinelt
> GPG-Key 0xDF13BA50
> ICQ #288386781
>
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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Justin Chudgar]

[-- Attachment #1.1: Type: text/plain, Size: 1084 bytes --]

Rudolf:

Juerg is the one who has been helping me out; so everything I say is likely a 
less accurate repetition of his words. My understanding is that there is at 
least one, and probably more, system configurations from VIA with C7 CPUs that 
do not work with the current c7temp module.

In my case it is a HP 2133 Mini-Note KX869AT. Michael has a different system, 
but the same issue. I used the version of CPUID that Juerg recommended and 
provided the output to him and the list several months ago. At that time he 
mentioned that he needed documentation from VIA to determine which registers 
meant what.


If you, Rudolf, are able to find out any technical info about these CPUs, or if 
you need more accurate technical info about the problems with c7temp, I would 
suggest contacting Juerg. I will be happy to provide any data from my system 
and try any patches that may help; but, I am sadly not a developer.

Thank you all for your interest and effort. 
-- 

Justin Chudgar
Information Technology Consultant
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530-938-9692 (Home Office)



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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Michael Reinelt]

Hi there,

Juerg Haefliger wrote:
> Please also run cpuid -r.

here you are:

artus.reinelt.local:~ # cpuid -r
CPU:
   0x00000000: eax=0x00000001 ebx=0x746e6543 ecx=0x736c7561 edx=0x48727561
   0x00000001: eax=0x000006d0 ebx=0x00000800 ecx=0x00004181 edx=0xa7c9bbff
   0x80000000: eax=0x80000006 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80000001: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00100000
   0x80000002: eax=0x20202020 ebx=0x20202020 ecx=0x20202020 edx=0x20202020
   0x80000003: eax=0x20202020 ebx=0x56202020 ecx=0x43204149 edx=0x72502037
   0x80000004: eax=0x7365636f ebx=0x20726f73 ecx=0x30303531 edx=0x007a484d
   0x80000005: eax=0x00000000 ebx=0x08800880 ecx=0x40040140 edx=0x40040140
   0x80000006: eax=0x00000000 ebx=0x00000000 ecx=0x0080a140 edx=0x00000000
   0x80860000: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0xc0000000: eax=0xc0000003 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0xc0000001: eax=0x00000000 ebx=0x00000002 ecx=0x00000000 edx=0x0000ffcc
   0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13 edx=0x42040000
   0xc0000003: eax=0x57762abe ebx=0xce237d7f ecx=0x5ee56564 edx=0xe8619e36


I tried another thing, which unfortunately is not promising: I ran cpuid
-r several times, nothing changed. Then I started a cpuburn process
(which should lead to a cpu temp increase) but again: nothing changed in
the output of cpuid :-(


<crying> I want a CPU temperature! </crying>

-- 
Michael Reinelt <michael@reinelt.co.at>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Rudolf Marek]

Hello Jason,

We have some problem with c7temp driver in the linux. This was done by Juerg.
The driver can be downloaded from the lm-sensors.org website in devices section.

It seems some version of fam6 model D does not have any temperature register in

>    0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13 edx=0x42040000

Jason, Please can you look to some more recent version of C7 data book, where 
the values for temperature are stored? (normally they are for cpuid EAX = 
0xc0000002 in EAX. Here are zeros.

I dont know what CPU revision it is exactly. I guess we will need to read some 
other MSR to get current version. Juerg do you know this? Its should be MSR 1154h.

All I know that the cpu is also at HP Mini-note 2133.

Thanks,
Rudolf




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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[JasonZhao]

Rudolf
Will reply you tonight (3 hours later), back to home now:)
However I found I only have a " VIA C7 BIOS WRITERS GUIDE_2.5"( created
in 04/04/07) on hand. My colleague that works for c7 on EFI only have
this datasheet too.

-jasonzhao 

> -----Original Message-----
> From: Rudolf Marek [mailto:r.marek@assembler.cz]
> Sent: Friday, March 13, 2009 6:02 PM
> To: Jason Zhao
> Cc: Michael Reinelt; Juerg Haefliger; justin@justinzane.com;
> lm-sensors@lm-sensors.org
> Subject: Re: [lm-sensors] module c7temp shows voltage, but no
temperature
> 
> Hello Jason,
> 
> We have some problem with c7temp driver in the linux. This was done by
Juerg.
> The driver can be downloaded from the lm-sensors.org website in
devices
> section.
> 
> It seems some version of fam6 model D does not have any temperature
register
> in
> 
> >    0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13
edx=0x42040000
> 
> Jason, Please can you look to some more recent version of C7 data
book, where
> the values for temperature are stored? (normally they are for cpuid
EAX > 0xc0000002 in EAX. Here are zeros.
> 
> I dont know what CPU revision it is exactly. I guess we will need to
read some
> other MSR to get current version. Juerg do you know this? Its should
be MSR
> 1154h.
> 
> All I know that the cpu is also at HP Mini-note 2133.
> 
> Thanks,
> Rudolf
> 
> 


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Re: [lm-sensors] module c7temp shows voltage, but no temperature

[Juerg Haefliger]

All,

From the information that I have it seems that some BIOSes are turning
some features off that will also disable the reporting of the temp via
0xc0000002. Jason, does you BIOS writer guide say why and what feature
and under what circumstances this should be done by the BIOS?

Thanks
...juerg

On Fri, Mar 13, 2009 at 4:03 AM,  <JasonZhao@viatech.com.cn> wrote:
> Rudolf
> Will reply you tonight (3 hours later), back to home now:)
> However I found I only have a " VIA C7 BIOS WRITERS GUIDE_2.5"( created
> in 04/04/07) on hand. My colleague that works for c7 on EFI only have
> this datasheet too.
>
> -jasonzhao
>
>> -----Original Message-----
>> From: Rudolf Marek [mailto:r.marek@assembler.cz]
>> Sent: Friday, March 13, 2009 6:02 PM
>> To: Jason Zhao
>> Cc: Michael Reinelt; Juerg Haefliger; justin@justinzane.com;
>> lm-sensors@lm-sensors.org
>> Subject: Re: [lm-sensors] module c7temp shows voltage, but no
> temperature
>>
>> Hello Jason,
>>
>> We have some problem with c7temp driver in the linux. This was done by
> Juerg.
>> The driver can be downloaded from the lm-sensors.org website in
> devices
>> section.
>>
>> It seems some version of fam6 model D does not have any temperature
> register
>> in
>>
>> >    0xc0000002: eax=0x00000000 ebx=0x08000810 ecx=0x08100f13
> edx=0x42040000
>>
>> Jason, Please can you look to some more recent version of C7 data
> book, where
>> the values for temperature are stored? (normally they are for cpuid
> EAX >> 0xc0000002 in EAX. Here are zeros.
>>
>> I dont know what CPU revision it is exactly. I guess we will need to
> read some
>> other MSR to get current version. Juerg do you know this? Its should
> be MSR
>> 1154h.
>>
>> All I know that the cpu is also at HP Mini-note 2133.
>>
>> Thanks,
>> Rudolf
>>
>>
>
>

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