Eu tenho dual-boot do meu laptop há cerca de seis meses, de um lado, o Ubuntu 14.04 e, no outro, o Windows 7. Quando eu comprei este computador, dois anos e meio atrás, ele tinha 8GB de RAM. Meu sistema operacional Windows diz que eu tenho 8GB de memória RAM. No entanto, o Ubuntu reconhece apenas 4 GB de RAM. Eu sei que tem sido assim desde que eu comecei a dual-boot, mas eu realmente nunca tentei fazer muito sobre isso hoje. Eu olhei em alguns lugares on-line, mas não encontrei muita ajuda. Para nos poupar de alguns problemas com os resultados dos comandos e com as estatísticas do computador, vou poupar-nos todo o tempo e fornecer tudo agora.
Computador:
Toshiba Satellite L655-S158
Sistema operacional:
Ubuntu 14.04 LTS
uname -m
x86_64
cat / proc / meminfo
MemTotal: 3843080 kB
MemFree: 503960 kB
Buffers: 1079968 kB
Cached: 1264284 kB
SwapCached: 0 kB
Active: 1072992 kB
Inactive: 2027536 kB
Active(anon): 502716 kB
Inactive(anon): 410464 kB
Active(file): 570276 kB
Inactive(file): 1617072 kB
Unevictable: 32 kB
Mlocked: 32 kB
SwapTotal: 6291452 kB
SwapFree: 6291452 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 756348 kB
Mapped: 252040 kB
Shmem: 156904 kB
Slab: 151668 kB
SReclaimable: 121160 kB
SUnreclaim: 30508 kB
KernelStack: 3880 kB
PageTables: 30508 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 8212992 kB
Committed_AS: 3836276 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 546060 kB
VmallocChunk: 34359183836 kB
HardwareCorrupted: 0 kB
AnonHugePages: 69632 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 61696 kB
DirectMap2M: 3926016 kB
sudo dmidecode - tipo de memória
# dmidecode 2.12
SMBIOS 2.6 present.
Handle 0x0019, 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: No Error
Number Of Devices: 2
Handle 0x001A, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: 0x001C
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: SODIMM
Set: None
Locator: DIMM0
Bank Locator: BANK 0
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Not Specified
Serial Number: 960F424C
Asset Tag: Unknown
Part Number: M471B5673FH0-CF8
Rank: 2
Handle 0x001B, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM0
Bank Connections: None
Current Speed: Unknown
Type: DIMM
Installed Size: 2048 MB (Single-bank Connection)
Enabled Size: 2048 MB (Single-bank Connection)
Error Status: OK
Handle 0x001E, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: Not Provided
Total Width: 8 bits
Data Width: 8 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: BANK 1
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Not Specified
Serial Number: 00000000
Asset Tag: Unknown
Part Number: Not Specified
Rank: 1
Handle 0x001F, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM1
Bank Connections: None
Current Speed: Unknown
Type: DIMM
Installed Size: Not Installed
Enabled Size: Not Installed
Error Status: OK
Handle 0x0021, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: 0x0023
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: SODIMM
Set: None
Locator: DIMM1
Bank Locator: BANK 2
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Not Specified
Serial Number: 960F4251
Asset Tag: Unknown
Part Number: M471B5673FH0-CF8
Rank: 2
Handle 0x0022, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM1
Bank Connections: None
Current Speed: Unknown
Type: DIMM
Installed Size: 2048 MB (Single-bank Connection)
Enabled Size: 2048 MB (Single-bank Connection)
Error Status: OK
Handle 0x0025, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0019
Error Information Handle: Not Provided
Total Width: 8 bits
Data Width: 8 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator: BANK 3
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Not Specified
Serial Number: 00000000
Asset Tag: Unknown
Part Number: Not Specified
Rank: 1
Handle 0x0026, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM3
Bank Connections: None
Current Speed: Unknown
Type: DIMM
Installed Size: Not Installed
Enabled Size: Not Installed
Error Status: OK
Handle 0x002A, DMI type 5, 20 bytes
Memory Controller Information
Error Detecting Method: None
Error Correcting Capabilities:
Unknown
None
Supported Interleave: One-way Interleave
Current Interleave: One-way Interleave
Maximum Memory Module Size: 8192 MB
Maximum Total Memory Size: 16384 MB
Supported Speeds:
Other
Supported Memory Types:
Other
Memory Module Voltage: Unknown
Associated Memory Slots: 2
0x001B
0x0022
Enabled Error Correcting Capabilities:
None
free -m
total used free shared buffers cached
Mem: 3753 3299 453 155 1055 1245
-/+ buffers/cache: 998 2754
Swap: 6143 0 6143
Então, como faço para que meu computador reconheça os outros 4 GB?