Re: Can't read DIMM SPD info (DDR2)

["Michal Zatloukal" <myxal.mxl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Sun, 11 Sep 2011 13:08:23 +0200, Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
wrote:


<snip>
> No SMBus I801 adapter. Is the i2c-i801 driver loaded? Do you see any
> complaints in the kernel log (e.g. ACPI resource conflict) when reloading
> the i2c-i801 driver?

D'oh, that's the whole problem! After loading the i2c-i801 driver, it
works perfectly. Laptop and server. :)
There's no problem loading the driver that I can see, it's simply not
loaded by default.

Sep 11 13:12:55 johny kernel: [391626.148255] i801_smbus 0000:00:1f.3: PCI
INT B -> GSI 19 (level, low) -> IRQ 19

Sep 11 13:10:23 esprimo kernel: [ 6993.108993] i801_smbus 0000:00:1f.3:
PCI INT C -> GSI 19 (level, low) -> IRQ 19

There are some complaints from drm from when I probed the other buses:
Sep 11 13:10:59 esprimo kernel: [ 7029.730036] [drm] GMBUS timed out,
falling back to bit banging on pin 0 [i915 gmbus disabled]
Sep 11 13:11:01 esprimo kernel: [ 7031.120065] [drm] GMBUS timed out,
falling back to bit banging on pin 6 [i915 gmbus reserved]


$ decode-dimms
# decode-dimms version 5733 (2009-06-09 13:13:41 +0200)

Memory Serial Presence Detect Decoder
By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
Jean Delvare, Trent Piepho and others

Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/15-0050
Guessing DIMM is in                             bank 1

<snip>
Number of SDRAM DIMMs detected and decoded: 2

Thanks for the help.


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