XF86 4.2.1 freezes after new 4.7 install

hi

jus finished putting the finishing touches on a new 4.7 install onto a TECRA
720CDT

strange thing started happenning that is not hardware related

after starting X, whether plain vanilla X or KDE after a few min or a few
seconds the laptop locks up solid, i mean just freezes, nothing in the logs.

hard reboot is the only cure, no key sequence to kill the X server (as in
ctl-alt-bkspc), or to ctl-alt-Fx to get back to a terminal or even to ping
or telnet into laptop from across the LAN,   i mean the sucker is so frozen
that the only indication it's still on is teh frozen image on the screen.

thought at first it was hardware, so i ran it in windoz for long periods and
it does fine, it runs fine under FBSD 4.7 as long as i don't invoke X win

this happens as mentioned only after invoking X and X loads
doesn't matter if i'm using the laptop's internal joystick style pointer or
an external mouse attached to its PS/2 port.

any  one have similar exp or suggestions?

--P

PS: wondering if the moused daemon might hav been the problem so i 
diabled moused in rc.conf and also killed off moused

now when i startx whether plain vanilla or kde there is no mouse or 
rather there is a pointer in the middle of the screen that can't be moved 
whereas when moused was active i could move the pointer but then it'd lock
up 
solid as stated above..

pls note that i use an external mouse most always rather than rely on laptop's internal joystick style mouse.

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