Acer Aspire R3600 (revo) shows only 3GB ram instead the 4 i have installed

[nandelbosc]

Good night,

I'm using ubuntu 9.04 on an Acer Aspire Revo R3600. I upgraded it with 4GB of RAM.

After update to the latest bios version, I can see 4GB of memory in the BIOS menus, but not in ubuntu.

I tried to install this packages (http://www.ubuntugeek.com/how-to-use...-ubuntu.html):

sudo apt-get install linux-restricted-modules-server

sudo apt-get install linux-headers-server

sudo apt-get install linux-image-server linux-server

after reboot I still see only 3GB...

$ free -m
             total       used       free     shared    buffers     cached
Mem:          3023        603       2420          0         33        281
-/+ buffers/cache:        288       2735
Swap:         1027          0       1027

what i'm doing wrong?

thank's!

[nandelbosc]

I'm sure, i'm using the server kernel...

$ uname -r
2.6.28-15-server

with PAE...

$ cat /usr/src/linux-headers-2.6.28-15-server/.config  | grep -i pae
CONFIG_X86_PAE=y

any ideas?

thank's!

[nandelbosc]

No answer?

Can somebody guide me to a correct point (other forums, mailing list,...) to try to solve this pproblem?

[philcamlin]

you know how when you install 1gb of mem you end up with like 950mb ...
your machine is showing 3023 mb so its obviously seeing more then 3gb or else you would have some number in the 2GB range

so its not that its not seeing the memory its just i think one of those things that its lower then its suposed to be

EX: my 2gb shows up as 1.7GB
my dads 512mb shows up as 501mb

just a thought can anyone else help?

[nandelbosc]

thank's philcamlin, but I think you are a little bit exaggerated...

If we are talking in GB, I can accepted to see 3,5 or 3,4 GB instead the 4GB, but see that...

marc@michael:~$ free
             total       used       free     shared    buffers     cached
Mem:       3096500     469824    2626676          0      34068     213372
-/+ buffers/cache:     222384    2874116
Swap:      1052248          0    1052248
marc@michael:~$ free -m
             total       used       free     shared    buffers     cached
Mem:          3023        460       2563          0         33        208
-/+ buffers/cache:        219       2804
Swap:         1027          0       1027
marc@michael:~$ free -g
             total       used       free     shared    buffers     cached
Mem:             2          0          2          0          0          0
-/+ buffers/cache:          0          2
Swap:            1          0          1

From 3096500KB (2GB with free -g!!!) to 4GB I think is too far...

PD: I used 2 modules of 2GB ddr2 kingston RAM.

[ChAoS.ct]

I have a Revo and it uses shared memory for the GPU. This means that the bios can take up to 1/4 of the RAM memory to the GPU.

In your case 1/4 of 4GB is 1GB

You can tweak these settings in the BIOS Setup.

[Revo1]

I have this exact model - Acer Aspire Revo R3600 Atom 330 with 2GB of RAM. I have been trying to find out what the exact brand of RAM it takes to upgrade to 4GB of RAM. Can you tell me how you upgraded? Do you know specifically what RAM brand will be compatible aside from it being PC2-6400? Thanks much.

[warden976]

have a look at http://techie-buzz.com/linux-tips/ho...ram-limit.html - i've just run it and gone from 2.9 GB to 3.7 GB

[nandelbosc]

Revo1, I buyed more RAM apart... Two modules of Kingston KTH-ZD8000B/2G (equiv. HP/COMPAQ P/N: EM995AA)

Thank's warden976, but after install PAE I've got the same amount of RAM...

$ uname -a
Linux michael 2.6.31-15-generic-pae #50-Ubuntu SMP Tue Nov 10 16:12:10 UTC 2009 i686 GNU/Linux

$ free -m
             total       used       free     shared    buffers     cached
Mem:          3023        929       2094          0         72        538
-/+ buffers/cache:        318       2705
Swap:         1027          0       1027

[jrwu]

I got my Revo R3600, and upgrade it to 4gb ram three days ago.
It shows there are 4GB in BIOS but 3GB in Ubuntu server 9.10.
No matter x86-pae version or amd64 versions, 'free' just reports 3023MB.

Since there are so many computer using ATOM 330, and only Revo's users encounter this problem, I guess that may be it's because of a bad design of Revo's motherboard.

There are a lot Revo with Windows 7 installed around.
Can anyone tells us whether Windows 7 sees 4GB ram in REVO?