执行“nvidia-smi -a”命令后，我得到了以下输出。这是否意味着Nvidia显卡不工作？我对Linux操作系统还不熟悉。
==============NVSMI LOG==============
Timestamp : Thu Jul 23 01:56:25 2015
Driver Version : 352.21
Attached GPUs : 1
GPU 0000:08:00.0
Product Name : GeForce 820M
Product Brand : GeForce
Display Mode : N/A
Display Active : N/A
Persistence Mode : Disabled
Accounting Mode : N/A
Accounting Mode Buffer Size : N/A
Driver Model
Current : N/A
Pending : N/A
Serial Number : N/A
GPU UUID : GPU-8d915dd4-46a3-5873-de52-c5af01f1faff
Minor Number : 0
VBIOS Version : 75.17.86.00.04
MultiGPU Board : N/A
Board ID : N/A
Inforom Version
Image Version : N/A
OEM Object : N/A
ECC Object : N/A
Power Management Object : N/A
GPU Operation Mode
Current : N/A
Pending : N/A
PCI
Bus : 0x08
Device : 0x00
Domain : 0x0000
Device Id : 0x114010DE
Bus Id : 0000:08:00.0
Sub System Id : 0x06521028
GPU Link Info
PCIe Generation
Max : N/A
Current : N/A
Link Width
Max : N/A
Current : N/A
Bridge Chip
Type : N/A
Firmware : N/A
Replays since reset : N/A
Tx Throughput : N/A
Rx Throughput : N/A
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons : N/A
FB Memory Usage
Total : 2047 MiB
Used : 161 MiB
Free : 1886 MiB
BAR1 Memory Usage
Total : N/A
Used : N/A
Free : N/A
Compute Mode : Default
Utilization
Gpu : N/A
Memory : N/A
Encoder : N/A
Decoder : N/A
Ecc Mode
Current : N/A
Pending : N/A
ECC Errors
Volatile
Single Bit
Device Memory : N/A
Register File : N/A
L1 Cache : N/A
L2 Cache : N/A
Texture Memory : N/A
Total : N/A
Double Bit
Device Memory : N/A
Register File : N/A
L1 Cache : N/A
L2 Cache : N/A
Texture Memory : N/A
Total : N/A
Aggregate
Single Bit
Device Memory : N/A
Register File : N/A
L1 Cache : N/A
L2 Cache : N/A
Texture Memory : N/A
Total : N/A
Double Bit
Device Memory : N/A
Register File : N/A
L1 Cache : N/A
L2 Cache : N/A
Texture Memory : N/A
Total : N/A
Retired Pages
Single Bit ECC : N/A
Double Bit ECC : N/A
Pending : N/A
Temperature
GPU Current Temp : 51 C
GPU Shutdown Temp : N/A
GPU Slowdown Temp : N/A
Power Readings
Power Management : N/A
Power Draw : N/A
Power Limit : N/A
Default Power Limit : N/A
Enforced Power Limit : N/A
Min Power Limit : N/A
Max Power Limit : N/A
Clocks
Graphics : N/A
SM : N/A
Memory : N/A
Applications Clocks
Graphics : N/A
Memory : N/A
Default Applications Clocks
Graphics : N/A
Memory : N/A
Max Clocks
Graphics : N/A
SM : N/A
Memory : N/A
Clock Policy
Auto Boost : N/A
Auto Boost Default : N/A
Processes : N/A