Mouse e teclado não funcionam (atraso extremo) após nova instalação do Linux Mint 17.1

Question

Depois de instalar o Linux Mint Cinnamon 17,1 (32 bits) no meu laptop vaio z, o mouse e o teclado começam a funcionar por alguns segundos, depois congelam e continuam a trabalhar de forma muito intermitente. Por exemplo, eu acerto a super-chave e em algum momento dentro dos próximos 10mins o menu aparecerá - assim como um atraso extremo. Como posso remediar isso?

Por favor me aponte em qualquer direção. Tanto o mouse quanto o teclado funcionam bem no liveUSB e funcionam no BIOS. 'lsusb' retorna

mint@mint ~ $ lsusb
Bus 002 Device 003: ID 054c:0243 Sony Corp. MicroVault Flash Drive
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 0489:e00f Foxconn / Hon Hai Foxconn T77H114 BCM2070 [Single-Chip Bluetooth 2.1 + EDR Adapter]
Bus 001 Device 005: ID 05c6:9224 Qualcomm, Inc. Sony Gobi 2000 Wireless Modem (QDL mode)
Bus 001 Device 004: ID 05ca:18b7 Ricoh Co., Ltd 
Bus 001 Device 003: ID 147e:1001 Upek TCS5B Fingerprint sensor
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

e top retornam

mint@mint ~ $ top

top - 17:46:09 up 11 min,  8 users,  load average: 0.18, 0.15, 0.14
Tasks: 157 total,   1 running, 156 sleeping,   0 stopped,   0 zombie
%Cpu(s):  1.1 us,  0.0 sy,  0.0 ni, 97.8 id,  1.1 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:   5864844 total,  1376728 used,  4488116 free,   163672 buffers
KiB Swap:  5951484 total,        0 used,  5951484 free.   807912 cached Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND    
 2247 root      20   0  144232  53528  45516 S   4.3  0.9   0:15.84 Xorg       
 3020 mint      20   0  199240  15876  11784 S   4.3  0.3   0:00.97 gnome-ter+ 
 3321 mint      20   0    5432   1376   1000 R   4.3  0.0   0:00.36 top        
    1 root      20   0    4468   2576   1464 S   0.0  0.0   0:01.88 init       
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kthreadd   
    3 root      20   0       0      0      0 S   0.0  0.0   0:00.09 ksoftirqd+ 
    5 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/0+ 
    7 root      20   0       0      0      0 S   0.0  0.0   0:00.31 rcu_sched  
    8 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_bh     
    9 root      rt   0       0      0      0 S   0.0  0.0   0:01.54 migration+ 
   10 root      rt   0       0      0      0 S   0.0  0.0   0:00.01 watchdog/0 
   11 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 watchdog/1 
   12 root      rt   0       0      0      0 S   0.0  0.0   0:01.51 migration+ 
   13 root      20   0       0      0      0 S   0.0  0.0   0:00.07 ksoftirqd+ 
   15 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/1+ 
   16 root      rt   0       0      0      0 S   0.0  0.0   0:00.48 watchdog/2 
   17 root      rt   0       0      0      0 S   0.0  0.0   0:00.08 migration+ 
mint@mint ~ $