so im completely new here and need some help.

everytime i play a video or music (online or from hard drive), it plays regularly for a short time then freezes or lags monentarily until i move the mouse, it will keep freezing intermittantly unless i keep moving the mouse.

from the system info it says my graphics driver is unknown.

this is what ive got so far but anything further gets a dead end:

lspci -nnk | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile  945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2]  (rev 03)
is it just a driver issue? how do i fix this?

please excuse my ignorance!