Ordinateur lente

momo@momo-All-Series:~$ free -m
             total       used       free     shared    buffers     cached
Mem:     15924       6010       9914        428        203       2244
-/+ buffers/cache:    3562      12362
Swap:        16259          0      16259

momo@momo-All-Series:~$ top -b -n 1 | head -10 
top - 11:02:50 up  1:18,  4 users,  load average: 0,14, 0,81, 1,74
Tasks: 249 total,   1 running, 248 sleeping,   0 stopped,   0 zombie
%Cpu(s): 11,1 us, 16,4 sy,  0,1 ni, 72,1 id,  0,3 wa,  0,0 hi,  0,0 si,  0,0 st
KiB Mem:  16306784 total,  6152252 used, 10154532 free,   209272 buffers
KiB Swap: 16650236 total,        0 used, 16650236 free.  2292492 cached Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 1891 momo      20   0  493608  40476  22092 S   6,5  0,2   0:51.90 compiz
    1 root      20   0   33896   4404   2664 S   0,0  0,0   0:01.44 init
    2 root      20   0       0      0      0 S   0,0  0,0   0:00.02 kthreadd

À part 6 Go de ram utilisées, je ne vois pas trop ce qui pourrait ralentir ton PC ;-\

Relance la commande

top

normalement, puis appuie sur la touche M (en majucule, donc SHIFT+M) pour avoir un tri sur la consommation mémoire et voir quelles sont les programmes qui sont susceptibles de te prendre des ressources...

momo@PC-MOMO:~/workspace/trunk$ lspci
00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI Controller
00:16.0 Communication controller: Intel Corporation 9 Series Chipset Family ME Interface #1
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection (2) I218-V
00:1a.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 1 (rev d0)
00:1c.3 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d0)
00:1d.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #1
00:1f.0 ISA bridge: Intel Corporation 9 Series Chipset Family H97 Controller
00:1f.2 SATA controller: Intel Corporation 9 Series Chipset Family SATA Controller [AHCI Mode]
00:1f.3 SMBus: Intel Corporation 9 Series Chipset Family SMBus Controller
03:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 04)

momo@PC-MOMO:~/workspace/trunk$ uname -a
Linux PC-MOMO 3.19.0-28-generic #30-Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux