Lentidão - Debian Lenny

Instalei o Openshot e o flightgear com os repositórios sid e unstable e a máquina ficou uma carroça. Antes não chegava a ser uma ferrari, mas rodava muuuito bem e rápido. Agora o X tá consumindo todo processamento mesmo com tudo desligado =( Alguma dica de como resolver sem sofrimento?

top - 09:42:44 up 17 min, 2 users, load average: 0.31, 0.65, 0.52
Tasks: 116 total,   1 running, 115 sleeping,   0 stopped,   0 zombie
Cpu(s): 28.6%us, 1.1%sy, 0.0%ni, 64.3%id, 5.9%wa, 0.2%hi, 0.0%si, 0.0%st
Mem:   1001212k total,   501456k used,   499756k free,    35524k buffers
Swap:   979924k total,        0k used,   979924k free,   294768k cached

PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
3796 root      20   0 351m 28m 7332 S   67 2.9   9:01.26 Xorg
    1 root      20   0 2132 704 608 S    0 0.1   0:01.10 init
    2 root      15 -5     0    0    0 S    0 0.0   0:00.00 kthreadd
    3 root      RT -5     0    0    0 S    0 0.0   0:00.04 migration/0
    4 root      15 -5     0    0    0 S    0 0.0   0:00.10 ksoftirqd/0
    5 root      RT -5     0    0    0 S    0 0.0   0:00.00 watchdog/0
    6 root      RT -5     0    0    0 S    0 0.0   0:00.00 migration/1
    7 root      15 -5     0    0    0 S    0 0.0   0:00.20 ksoftirqd/1
    8 root      RT -5     0    0    0 S    0 0.0   0:00.00 watchdog/1
    9 root      15 -5     0    0    0 S    0 0.0   0:00.14 events/0
   10 root      15 -5     0    0    0 S    0 0.0   0:00.08 events/1
   11 root      15 -5     0    0    0 S    0 0.0   0:00.00 khelper
   44 root      15 -5     0    0    0 S    0 0.0   0:00.06 kblockd/0
   45 root      15 -5     0    0    0 S    0 0.0   0:00.02 kblockd/1
   47 root      15 -5     0    0    0 S    0 0.0   0:00.00 kacpid
   48 root      15 -5     0    0    0 S    0 0.0   0:00.00 kacpi_notify
146 root      15 -5     0    0    0 S    0 0.0   0:00.58 kseriod