Detection of 4go RAM 32 bits Processor

[lfmparente]

Hi all,

I have 4 Go Ram but I can only see 3, in the BIOS I can see 4096 Ram...

I have the Ubunto 12.10 32 bits and I have read the following:


You misunderstand PAE. It allows you to access more REAL RAM (on the motherboard). The 32-bit address space remains at 4 Gig - of which (usually) 1 Gig is kernel reserved."

If Correct how I can see if how much RAM is reserved for de Kernel, and hence is normal to see only 3Go RAM?

Another problem....

After this:


sudo apt-get install linux-generic-pae linux-headers-generic-pae sudo apt-get remove linux-generic linux-image-generic linux-headers-generic
and

dpkg -l | grep linux-image



ii linux-image-3.5.0-17-generic 3.5.0-17.28 i386 Linux kernel image for version 3.5.0 on 32 bit x86 SMP
ii linux-image-3.5.0-19-generic 3.5.0-19.30 i386 Linux kernel image for version 3.5.0 on 32 bit x86 SMP
ii linux-image-extra-3.5.0-17-generic 3.5.0-17.28 i386 Linux kernel image for version 3.5.0 on 32 bit x86 SMP
ii linux-image-extra-3.5.0-19-generic 3.5.0-19.30 i386 Linux kernel image for version 3.5.0 on 32 bit x86 SMP
ii linux-image-generic 3.5.0.19.22 i386 Generic Linux kernel image


well ok.... I Have found the following:


For permanent change you'll need to edit your /etc/default/grub file -- place a "#" symbol at the start of line GRUB_HIDDEN_TIMEOUT=0.

Save changes and run sudo update-grub to apply changes.

But nothing appears....

I know that my processor is compatible with PAE because:
I have run a script and this the result


check-my-hardware.py - version: SJ 2009-12-21 OK, you're root ANALYSIS: Total of physical memory modules found 4096 MB in 2 memory module(s) [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009f7ff] usable [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000bf67ffff] usable BIOS offers 6122 MB as usable Memory seen by OS 3021 MB BIOS version 08/12/2008 CPU is PAE enabled CPU is 32-bit, and not x86_64 enabled OS is 32-bit without PAE ADVICE: You're running a plain 32-bit OS on a 32-bit PAE-enabled CPU. Upgrade to the 32-bit kernel with PAE 'linux-generic-pae' to get access to more memory
:

Thanks for any suggestion!

Best regards.

[dino99]

you need to install the generic-pae, not the generic.
install & open synaptic to do the changes

sudo apt-get install synaptic
sudo synaptic

[lfmparente]

Hi, thanks for your response;

Well I thought with this line


sudo apt-get install linux-generic-pae linux-headers-generic-pae sudo apt-get remove linux-generic linux-image-generic linux-headers-generic

I installed de Kernel with support PAE?


Can you explain how I have to do this?

Thanks,

best regards!

[lfmparente]

you need to install the generic-pae, not the generic.
install & open synaptic to do the changes

sudo apt-get install synaptic
sudo synaptic

Re: Detection of 4go RAM 32 bits Processor
Hi, thanks for your response;

Well I thought with this line

Code:
sudo apt-get install linux-generic-pae linux-headers-generic-pae sudo apt-get remove linux-generic linux-image-generic linux-headers-generic
I installed de Kernel with support PAE?


Can you explain how I have to do this?

Thanks,

best regards!

[mastablasta]

in 12.10 the pae kernel is installed by default (which give problems to some old maschines).

could it be possible that processor doesn't recognise the 4GB.

[lfmparente]

in 12.10 the pae kernel is installed by default (which give problems to some old maschines).

could it be possible that processor doesn't recognise the 4GB.

Yes my processor is old, is a T2250....

Thanks for your response.

[grahammechanical]

I am confused. I see this in the printout of the script that you ran:


CPU is PAE enabled CPU is 32-bit, and not x86_64 enabled OS is 32-bit without PAE ADVICE: You're running a plain 32-bit OS on a 32-bit PAE-enabled CPU. Upgrade to the 32-bit kernel with PAE 'linux-generic-pae' to get access to more memory

I have underlined the words that I think are important. I am confused because I also understood that Ubuntu 12.10 only came with a PAE kernel. And that the non-PAE versions had been discontinued with Ubuntu 12.10.

Could it be that you are using one of the flavours of Ubuntu that still have a non-PAE kernel available, such as Xubuntu?

https://help.ubuntu.com/community/EnablingPAE

http://www.webupd8.org/2012/11/how-to-install-ubuntu-1210-on-non-pae.html

Another thought occurs to me. Did you upgrade to 12.10 from a version of Ubuntu that was a non-pae OS?

Regards.

[lfmparente]

I am confused. I see this in the printout of the script that you ran:



I have underlined the words that I think are important. I am confused because I also understood that Ubuntu 12.10 only came with a PAE kernel. And that the non-PAE versions had been discontinued with Ubuntu 12.10.

Could it be that you are using one of the flavours of Ubuntu that still have a non-PAE kernel available, such as Xubuntu?

https://help.ubuntu.com/community/EnablingPAE

http://www.webupd8.org/2012/11/how-to-install-ubuntu-1210-on-non-pae.html

Regards.

I will try it, thanks.

mY pc is an Acer aspire 5612 AWLmi