Only 16GB of 20GB memory / RAM : found by kernel

Only 16GB of 20GB memory / RAM : found by kernel

[Hanasaki Jiji]

free -g reports 17GB

ROM set reports 20GB as does the below (4+16GB)   How to get the 4GB
bank to usable

kernel 5.10.x

****************
dmidecode -t memory

# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.2.1 present.

Handle 0x000A, DMI type 16, 23 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 32 GB
    Error Information Handle: 0x0009
    Number Of Devices: 2

Handle 0x0011, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x000A
    Error Information Handle: 0x0010
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4 GB
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL A
    Type: DDR4
    Type Detail: Synchronous Unbuffered (Unregistered)
    Speed: 3200 MT/s
    Manufacturer: Hynix
    Serial Number: 00000000
    Asset Tag: Not Specified
    Part Number: HMA851S6CJR6N-XN
    Rank: 1
    Configured Memory Speed: 2400 MT/s
    Minimum Voltage: 1.2 V
    Maximum Voltage: 1.2 V
    Configured Voltage: 1.2 V

Handle 0x0014, DMI type 17, 40 bytes
Memory Device
    Array Handle: 0x000A
    Error Information Handle: 0x0013
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 16 GB
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL B
    Type: DDR4
    Type Detail: Synchronous Unbuffered (Unregistered)
    Speed: 2667 MT/s
    Manufacturer: A-DATA Technology
    Serial Number: 00870000
    Asset Tag: Not Specified
    Part Number:
    Rank: 1
    Configured Memory Speed: 2400 MT/s
    Minimum Voltage: 1.2 V
    Maximum Voltage: 1.2 V
    Configured Voltage: 1.2 V

Re: Only 16GB of 20GB memory / RAM : found by kernel

[Randy Dunlap]

On 2/8/21 5:25 PM, Hanasaki Jiji wrote:
> free -g reports 17GB
> 
> ROM set reports 20GB as does the below (4+16GB)   How to get the 4GB
> bank to usable
> 
> kernel 5.10.x
> 
> ****************
> dmidecode -t memory
> 
> # dmidecode 3.3
> Getting SMBIOS data from sysfs.
> SMBIOS 3.2.1 present.

Hi,

a. wrong mailing list. Please try linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

b. Let us know if this failure is new for 5.10.x or not.
   I.e., did it work previously?

c. Is this an x86 system? Probably need to Cc: some relevant
   maintainers, whether it's x86 or something else.
   Probably also need to provide more boot log info, not just
   dmidecode.

-- 
~Randy

Re: Only 16GB of 20GB memory / RAM : found by kernel

[Hanasaki Jiji]

Answers to the beow:
a- will post on that list. thanks
b.new system; so not sure if the 4.x kernels worked.  The debian 5.10
distribution image does boot
c. yes itts a x86 (Ryzen 3700u)

On Mon, Feb 8, 2021 at 10:27 PM Randy Dunlap <rdunlap-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> wrote:
>
> On 2/8/21 5:25 PM, Hanasaki Jiji wrote:
> > free -g reports 17GB
> >
> > ROM set reports 20GB as does the below (4+16GB)   How to get the 4GB
> > bank to usable
> >
> > kernel 5.10.x
> >
> > ****************
> > dmidecode -t memory
> >
> > # dmidecode 3.3
> > Getting SMBIOS data from sysfs.
> > SMBIOS 3.2.1 present.
>
> Hi,
>
> a. wrong mailing list. Please try linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>
> b. Let us know if this failure is new for 5.10.x or not.
>    I.e., did it work previously?
>
> c. Is this an x86 system? Probably need to Cc: some relevant
>    maintainers, whether it's x86 or something else.
>    Probably also need to provide more boot log info, not just
>    dmidecode.
>
> --
> ~Randy
>