[coreboot] X201i RAM upgrade not working

[Mono]

On Fri, Sep 12, 2014 at 03:21:06PM -0700, ron minnich wrote:
> I'm still convinced this is an issue with the code, not the insertion
> of the DIMMs.
um, actually that is what I was trying to say with those test results.
> 
> Are the DIMMs identical w.r.t. timing? Are you always plugging the
> same DIMMs into the same slots, or did you try swapping them around?
> 
> ron
I have swapped them. The failure and the workaround appear to be not affected by swapping the DIMMs. As for the timings I am not sure at all. Maybe you could comment on this from following informations:
>From what is written on the DIMMs they possibly could have the same timing, although the chip names are not identical.
DIMM one stickers:
-----------------------------------------
RAMAXEL 2GB 2RX8      PC3-8500S-777 HF
                      100280045
                      20103563
NK0010090120000032    RMT1970ED48E8F-1066
-----------------------------------------
*11S41R0625ZVJ5DA09XGJ6*      SEP/29/2010
FRU  55Y3713                  DIMM
-----------------------------------------
DIMM one chips:
-----------------------------------------
ELPIDA TWN
J1108BDBG
-DJ-F
1028RR04420
-----------------------------------------
DIMM two stickers:
-----------------------------------------
RAMAXEL 2GB 2RX8      PC3-8500S-777 HF
                      100280045
                      20102314
NZ0010060530010342    RMT1970ED48E8F-1066
-----------------------------------------
*11S41R0625ZVJ5DA0737DC*
FRU: 55Y3713 DIMM
-----------------------------------------
DIMM two chips:
-----------------------------------------
ELPIDA TWN
J1108BDBG
-DJ-F
10210R21520
-----------------------------------------
With the DIMMs installed separately MemTest86+ writes for both:
RAM: 532 MHz (DDR3-1064) - BCLK: 133
Timings: CAS 7-7-7-20 @ 64-bit Mode
Memory SPD Informations
Slot 0: 2048 MB DDR3-1066 - Ramaxel RMT1970ED48E8F1066

However, I believe that they are run in Single Channel mode by coreboot. At least that is what it says in the logs. So in conclusion I do not know whether they have identical timings.

with best regards,
Mono