$ uname -a
Linux user1 2.6.28-271-gec75a15 #1 PREEMPT Thu Sep 10 17:37:32 JST 2009 armv7l GNU/Linux
$ uname -r
2.6.28-271-gec75a15
$ find /lib/modules/ | grep sisusbvga.ko
/lib/modules/2.6.28-271-gec75a15/kernel/drivers/usb/misc/sisusbvga/sisusbvga.ko
/lib/modules/2.6.28-15-araneo/kernel/drivers/usb/misc/sisusbvga/sisusbvga.ko
(大切なのは、uname -rのほう。この例では、下ではなく上の.koファイル）
$ md5sum -b /lib/modules/2.6.28-271-gec75a15/kernel/drivers/usb/misc/sisusbvga/sisusbvga.ko
c333bea898ebd2a35164d8bd439a733d */lib/modules/2.6.28-271-gec75a15/kernel/drivers/usb/misc/sisusbvga/sisusbvga.ko
$ ls -la /lib/modules/2.6.28-271-gec75a15/kernel/drivers/usb/misc/sisusbvga/
total 64
drwxr-xr-x 2 root root   232 Sep 11 15:40 .
drwxr-xr-x 3 root root  1992 Sep 11 15:40 ..
-rw-r--r-- 1 root root 61633 Sep 11 15:40 sisusbvga.ko
このファイルが見つからなかったら、素直にあきらめましょう。
$ ls -la /etc/X11/
total 16
drwxr-xr-x   9 root root  1072 Dec 10 10:55 .
drwxr-xr-x 117 root root 14776 Dec 10 09:06 ..
lrwxrwxrwx   1 root root    13 Sep 11 14:38 X -> /usr/bin/Xorg
drwxr-xr-x   2 root root   232 Sep 11 02:52 Xresources
-rwxr-xr-x   1 root root  3730 Jun 25  2008 Xsession
drwxr-xr-x   2 root root  1376 Sep 11 03:25 Xsession.d
-rw-r--r--   1 root root   265 Jun 25  2008 Xsession.options
-rw-------   1 root root   614 Sep 11 02:52 Xwrapper.config
drwxr-xr-x   2 root root  2344 Sep 11 03:10 app-defaults
drwxr-xr-x   2 root root   456 Sep 11 03:17 cursors
-rw-r--r--   1 root root    14 Sep 11 03:10 default-display-manager
drwxr-xr-x   6 root root   416 Sep 11 03:00 fonts
drwxr-xr-x   3 root root   368 Sep 11 03:13 xinit
drwxr-xr-x   2 root root   232 Sep 11 02:47 xkb
-rw-r--r--   1 root root     0 Sep 11 02:57 xorg.conf
$ ls -la /home/okajima/xorg.conf
-rw-r--r-- 1 okajima okajima 2046 Oct 22 18:56 /home/okajima/xorg.conf
$ md5sum -b /home/okajima/xorg.conf
54bcdba9ada4c34304025a4323daac18 */home/okajima/xorg.conf