sysadmin@linux01:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.04 DISTRIB_CODENAME=raring DISTRIB_DESCRIPTION="Ubuntu 13.04" sysadmin@linux01:~$ uname -a Linux linux01 3.2.0-38-generic #61-Ubuntu SMP Tue Feb 19 12:18:21 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux sysadmin@linux01:~$ free -m total used free shared buffers cached Mem: 3887 3462 424 0 104 1172 -/+ buffers/cache: 2186 1701 Swap: 15259 0 15259
id: firmware description: BIOS vendor: Intel Corp. physical id: 0 version: TCIBX10H.86A.0037.2010.0614.1712 date: 06/14/2010 size: 64KiB capacity: 960KiB capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification id: cpu description: CPU product: Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz vendor: Intel Corp. physical id: 4 bus info: cpu@0 version: Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz id: memory description: System Memory physical id: 28 slot: System board or motherboard size: 8GiB id: bank:0 description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns) product: JM1333KLN-4G vendor: Undefined physical id: 0 serial: 0009B06F slot: CHANNEL A size: 4GiB width: 64 bits clock: 1333MHz (0.8ns) id: bank:2 description: DIMM DDR3 Synchronous 1333 MHz (0.8 ns) product: JM1333KLH-4G vendor: Undefined physical id: 2 serial: 0009EA2B slot: CHANNEL B size: 4GiB width: 64 bits clock: 1333MHz (0.8ns)
Additional info from dmidecode
# dmidecode 2.11 SMBIOS 2.6 present. 79 structures occupying 3163 bytes. Table at 0x000E9270. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Intel Corp. Version: TCIBX10H.86A.0037.2010.0614.1712 Release Date: 06/14/2010 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 1024 kB Characteristics: PCI is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 kB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) ACPI is supported USB legacy is supported BIOS boot specification is supported Targeted content distribution is supported Handle 0x0028, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 16 GB Error Information Handle: 0x0029 Number Of Devices: 4 Handle 0x002B, DMI type 17, 28 bytes Memory Device Array Handle: 0x0028 Error Information Handle: 0x002C Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: DIMM Set: None Locator: CHANNEL A Bank Locator: CHANNEL A-DIMM 0 Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Undefined Serial Number: 0009B06F Asset Tag: A1_AssetTagNum0 Part Number: JM1333KLN-4G Rank: 2 Handle 0x0031, DMI type 17, 28 bytes Memory Device Array Handle: 0x0028 Error Information Handle: 0x0032 Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: DIMM Set: None Locator: CHANNEL B Bank Locator: CHANNEL B-DIMM 0 Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Undefined Serial Number: 0009EA2B Asset Tag: A1_AssetTagNum2 Part Number: JM1333KLH-4G Rank: 1
As you can see from the above information,
lshw can detech 8GB RAM on my system, but the OS cannot. Its a 64bit system. I have tried running a live CD , no luck.
I have also installed the latest kernel, did upgrade-grub and have checked the /etc/default/grub config file. No issues there.
I have upgraded the BIOS as well.
Can anyone help resolve this issue?