SMSC unknown non-standard chip with ID 0x20

[ticket]

here it is my sensors-detect output : sensors-detect # sensors-detect revision 4609 (2007-07-14 09:28:39 -0700) This program will help you determine which kernel modules you need to load to use lm_sensors most effectively. It is generally safe and recommended to accept the default answers to all questions, unless you know what you're doing. We can start with probing for (PCI) I2C or SMBus adapters. Do you want to probe now? (YES/no): y Probing for PCI bus adapters... Use driver `i2c-piix4' for device 0000:00:14.0: ATI Technologies Inc ATI SMBus We will now try to load each adapter module in turn. Module `i2c-piix4' already loaded. If you have undetectable or unsupported adapters, you can have them scanned by manually loading the modules before running this script. We are now going to do the I2C/SMBus adapter probings. Some chips may be double detected; we choose the one with the highest confidence value in that case. If you found that the adapter hung after probing a certain address, you can specify that address to remain unprobed. Next adapter: monid (i2c-0) Do you want to scan it? (YES/no/selectively): y Next adapter: dvi (i2c-1) Do you want to scan it? (YES/no/selectively): y Next adapter: vga (i2c-2) Do you want to scan it? (YES/no/selectively): y Next adapter: crt2 (i2c-3) Do you want to scan it? (YES/no/selectively): y Next adapter: SMBus PIIX4 adapter at 8060 (i2c-4) Do you want to scan it? (YES/no/selectively): y Client found at address 0x50 Handled by driver eeprom' (already loaded), chip type eeprom'

(note: this is probably NOT a sensor chip!)

Client found at address 0x51 Handled by driver eeprom' (already loaded), chip type eeprom'

(note: this is probably NOT a sensor chip!)

Some chips are also accessible through the ISA I/O ports. We have to write to arbitrary I/O ports to probe them. This is usually safe though. Yes, you do have ISA I/O ports even if you do not have any ISA slots! Do you want to scan the ISA I/O ports? (YES/no): y Probing for `National Semiconductor LM78' at 0x290... No Probing for `National Semiconductor LM78-J' at 0x290... No Probing for `National Semiconductor LM79' at 0x290... No Probing for `Winbond W83781D' at 0x290... No Probing for `Winbond W83782D' at 0x290... No Probing for `Silicon Integrated Systems SIS5595'... No Probing for `VIA VT82C686 Integrated Sensors'... No Probing for `VIA VT8231 Integrated Sensors'... No Probing for `IPMI BMC KCS' at 0xca0... No Probing for `IPMI BMC SMIC' at 0xca8... No Some Super I/O chips may also contain sensors. We have to write to standard I/O ports to probe them. This is usually safe. Do you want to scan for Super I/O sensors? (YES/no): y Probing for Super-I/O at 0x2e/0x2f Trying family `National Semiconductor'... No Trying family `SMSC'... Yes Found unknown non-standard chip with ID 0x20 Probing for Super-I/O at 0x4e/0x4f Trying family `National Semiconductor'... No Trying family `SMSC'... No Trying family `VIA/Winbond/Fintek'... No Trying family `ITE'... No Some CPUs or memory controllers may also contain embedded sensors. Do you want to scan for them? (YES/no): y AMD K8 thermal sensors... No Intel Core family thermal sensor... No Intel AMB FB-DIMM thermal sensor... No Sorry, no sensors were detected. Either your sensors are not supported, or they are connected to an I2C or SMBus adapter that is not supported. See doc/FAQ, doc/lm_sensors-FAQ.html or  http://www.lm-sensors.org/wiki/FAQ (FAQ #4.24.3) for further information. If you find out what chips are on your board, check  http://www.lm-sensors.org/wiki/Devices for driver status.

I enabled all possible kernel sensors modules

[ticket]

sensors-detect output text formatted for best viewing

[juergh]

Does the BIOS show any temp/voltage information? What machine/motherboard is this? Please run 'isadump -k 0x55 0x2e 0x2f' and post the output.

[ticket]

Replying to juergh:

Does the BIOS show any temp/voltage information? What machine/motherboard is this? Please run 'isadump -k 0x55 0x2e 0x2f' and post the output.

No, the bios doesn't have any temp/voltage information. My machine is an Acer Travelmate 2702 WLMI.

isadump output is :

isadump -k 0x55 0x2e 0x2f
WARNING! Running this program can cause system crashes, data loss and worse!
I will probe address register 0x2e and data register 0x2f.
Continue? [Y/n] Y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00: 00 80 80 00 00 00 00 00 00 00 40 00 0e 20 00 00 
10: 00 00 2e 00 00 00 01 00 00 00 00 00 00 00 00 00 
20: 00 00 00 00 00 be 00 00 03 80 00 df 01 03 00 00 
30: 00 00 00 ff 01 00 00 ff ff ff 00 00 00 00 00 00 
40: 00 80 80 00 00 00 00 00 00 00 40 00 0e 20 00 00 
50: 00 00 2e 00 00 00 01 00 00 00 00 00 00 00 00 00 
60: 00 00 00 00 00 be 00 00 03 80 00 df 01 03 00 00 
70: 00 00 00 ff 01 00 00 ff ff ff 00 00 00 00 00 00 
80: 00 80 80 00 00 00 00 00 00 00 40 00 0e 20 00 00 
90: 00 00 2e 00 00 00 01 00 00 00 00 00 00 00 00 00 
a0: 00 00 00 00 00 be 00 00 03 80 ff ff ff ff ff ff 
b0: 00 00 00 ff 01 00 00 ff ff ff 00 00 00 00 00 00 
c0: 00 80 80 00 00 00 00 00 00 00 40 00 0e 20 00 00 
d0: 00 00 2e 00 00 00 01 00 00 00 00 00 00 00 00 00 
e0: 00 00 00 00 00 be 00 00 03 80 00 df 01 03 00 00 
f0: 00 00 00 ff 01 00 00 ff ff ff 00 00 00 00 00 00 

[juergh]

You're most likely out of luck if the BIOS doesn't show any temp/fan info. And I don't recognize anything in the isadump. Have you tried speedfan under Windows? Sorry I can't help you.

[ticket]

Replying to juergh:

You're most likely out of luck if the BIOS doesn't show any temp/fan info. And I don't recognize anything in the isadump. Have you tried speedfan under Windows? Sorry I can't help you.

neither speedfan detects fan and temperature with default settings. I start to thinking that my laptop doesn't have chips that should detect fan speed/temperature.