Re: Problems with SMSC EMC2103-2

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Hi Sebastian,

Please keep the list included in the discussion.

On Thu, 31 May 2012 10:55:17 +0200, Sebastian Lefke wrote:
> sebl@sebl-NB ~ $ lspci
> 00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
> 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
> 00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
> 00:03.0 Communication controller: Intel Corporation Mobile 4 Series Chipset MEI Controller (rev 07)
> 00:03.2 IDE interface: Intel Corporation Mobile 4 Series Chipset PT IDER Controller (rev 07)
> 00:03.3 Serial controller: Intel Corporation Mobile 4 Series Chipset AMT SOL Redirection (rev 07)
> 00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
> 00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
> 00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
> 00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
> 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
> 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
> 00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
> 00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
> 00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
> 00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
> 00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
> 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
> 00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
> 00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03)
> 02:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
> 03:06.0 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
> 03:06.1 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)

The SMBus controller is missing (should be at 00:1f.3.) This explains
why sensors-detect couldn't see the SMSC EMC2103 chip.

This is something that was often seen on ICH3/4/5/6 systems, and the
kernel includes code to unhide the SMBus on these old chipsets, but I
think the latest one covered is the ICH7. We'd need to do the same with
the ICH9.

That being said...

> sebl@sebl-NB ~ $ sensors
> acpitz-virtual-0
> Adapter: Virtual device
> temp1:        +32.0°C  (crit = +105.0°C)
> temp2:        +20.0°C  (crit = +110.0°C)
> temp3:        +31.0°C  (crit = +110.0°C)
> temp4:        +32.0°C  (crit = +90.0°C)
> temp5:        +31.0°C  (crit = +105.0°C)
> 
> coretemp-isa-0000
> Adapter: ISA adapter
> Core 0:       +31.0°C  (high = +105.0°C, crit = +105.0°C)
> Core 1:       +31.0°C  (high = +105.0°C, crit = +105.0°C)

You have many ACPI thermal zones. Two seem to match the CPU cores as
reported by coretemp. The remaining 3 are very likely to come from the
EMC2103, as I'd be surprised if your laptop had more than one hardware
monitoring chip. So unhiding the SMBus controller would be a bad idea,
as it would open the door to races between ACPI and the i2c-i801 driver.

We're not going to help you shoot yourself in the foot, sorry.

-- 
Jean Delvare

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