我决定退出 Windows 10，并刚刚完成了 Ubuntu 16.04LTS 64 位版本的全新安装 - 所有更新均为最新。
问题是它只能看到 3.5GB 的 RAM。我检查了 BIOS，没有 RAM 内存选项，而 Windows 10 的 BIOS 在 30 分钟前显示安装了 8GB 内存。
是的，我 100% 确定 Ubuntu 是 64 位版本。
我可以尝试修复这个问题吗？我读了一些资料，但都没有什么用...
System information:
Toshiba Satellite-C655D
Processor : AMD E-300 APU with Radeon(tm) HD Graphics × 2
Graphics : Gallium 0.4 on AMD PALM (DRM 2.43.0, LLVM 3.8.0)
OS Type : 64-bit
SSD : 122.0 GB
Graphics : Gallium 0.4 on AMD PALM (DRM 2.43.0, LLVM 3.8.0)
从未在 Windows 中看到过类似的东西。那里的图形仅由 Radeon 提供。
谢谢！
LE：在 Pilot6 的建议下，我带回了更多信息：
免费的输出：
total used free shared buff/cache available
Mem: 3548 1115 1181 35 1251 2142
Swap: 3683 0 3683 .
chip@chip-Satellite-C655D:~$ sudo dmidecode | awk '/Memory (Array|Device)/' RS=
[sudo] password for chip:
Handle 0x0008, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 8 GB
Error Information Handle: No Error
Number Of Devices: 2
Handle 0x0009, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x0008
Error Information Handle: 0x000A
Total Width: 64 bits
Data Width: 8 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: DIMM0
Bank Locator: BANK0
Type: DDR3
Type Detail: Synchronous
Speed: 1066 MHz
Manufacturer: Unknown
Serial Number: 00000000
Asset Tag: Unknown
Part Number:
Rank: 2
Configured Clock Speed: 1066 MHz
Handle 0x000A, DMI type 18, 23 bytes
32-bit Memory Error Information
Type: OK
Granularity: Unknown
Operation: Unknown
Vendor Syndrome: Unknown
Memory Array Address: Unknown
Device Address: Unknown
Resolution: Unknown
Handle 0x000C, DMI type 20, 35 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000FFFFFFFF
Range Size: 4 GB
Physical Device Handle: 0x0009
Memory Array Mapped Address Handle: 0x0012
Partition Row Position: 1
Handle 0x000D, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x0008
Error Information Handle: 0x000E
Total Width: 64 bits
Data Width: 8 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: DIMM1
Bank Locator: BANK0
Type: DDR3
Type Detail: Synchronous
Speed: 1066 MHz
Manufacturer: Unknown
Serial Number: 00000000
Asset Tag: Unknown
Part Number:
Rank: 2
Configured Clock Speed: 1066 MHz
Handle 0x000E, DMI type 18, 23 bytes
32-bit Memory Error Information
Type: OK
Granularity: Unknown
Operation: Unknown
Vendor Syndrome: Unknown
Memory Array Address: Unknown
Device Address: Unknown
Resolution: Unknown
Handle 0x0010, DMI type 20, 35 bytes
Memory Device Mapped Address
Starting Address: 0x00100000000
Ending Address: 0x001FFFFFFFF
Range Size: 4 GB
Physical Device Handle: 0x000D
Memory Array Mapped Address Handle: 0x0012
Partition Row Position: 1
Handle 0x0011, DMI type 18, 23 bytes
32-bit Memory Error Information
Type: OK
Granularity: Unknown
Operation: Unknown
Vendor Syndrome: Unknown
Memory Array Address: Unknown
Device Address: Unknown
Resolution: Unknown
Handle 0x0012, DMI type 19, 31 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x001FFFFFFFF
Range Size: 8 GB
Physical Array Handle: 0x0008
Partition Width: 2
LLE：所以我只是交换了内存，所以 dimm 1 转到 dimm 2，反之亦然，现在我得到了 7.5 GiB。奇怪的东西...... :D
chip@chip-Satellite-C655D:~$ free -m
total used free shared buff/cache available
Mem: 7580 817 5983 21 779 6482
Swap: 3683 0 3683