I've installed and configured XFree86, installed libraries, and installed KDE. I have a Genius NetMouse PS/2 mouse, which I've configured as "ps/2" and "sysmouse" in rc.conf. I use a K/V/M switch, but that works fine otherwise and (I hope) isn't causing any trouble. When I start KDE, the pointer remains in the center, until I try to move the mouse -- then, menus flash constantly in the upper-right corner of the screen, but the cursor never reappears and I can't use the mouse.

Any ideas on what the problem is, and how to solve it?

Thank you.

select auto for your mouse, verify that you have xf86config setup for the correct graphics driver and monitor freq ranges, set it for 1024 res and 16bits, no virtual frame and try it again.
i suggest doing these changes one at a time, so you don't lose track of what actually did the Fix.
luck -O.

Thanks dfowensby. I eventually got the mouse working, but had problems with other hardware, and it was suggested that I move to 5.3beta2. This did fix my onboard NIC problem, but now I've got more "X" trouble...

I'm trying to configure my ATI Radeon 9000 64mb AGP video card with Xorg. No matter which config option I choose ('Xorg -configure', 'xorgcfg -textmode', xorgconfig), when I test the generated .conf file, the screen locks up with a bunch of colors and horizontal lines (green on top, blue everywhere else). The mouse cursor moves (at least the mouse works), but none of the Ctrl+Alt key combos work, and I can't escape the X session or access another virtual console. The "Device" section generated from 'Xorg -configure' is:
Section "Device"
Identifier "Card0"
Driver "ati"
VendorName "ATI Technologies Inc"
BoardName "Radeon RV250 If [Radeon 9000]"
BusID "PCI:3:0:0"

That looks okay to me, but what do I know? Here's any related output I can think of from 'pciconf -lv':
agp0@pci0:0:0: class=0x060000 card=0x00000000 chip=0x01e010de rev=0xa2
hdr=0x00
vendor = 'NVIDIA Corporation'
device = 'nForce2 AGP Controller'
class = bridge
subclass = HOST-PCI
(...)
none9@pci3:0:0: class=0x030000 card=0x20021002 chip=0x49661002 rev=0x01
hdr=0x00
vendor = 'ATI Technologies Inc.'
device = 'RV250 Radeon 9000/9000 Pro'
class = display
subclass = VGA
none10@pci3:0:1: class=0x038000 card=0x20031002 chip=0x496e1002
rev=0x01 hdr=0x00
vendor = 'ATI Technologies Inc.'
device = 'RV250 Radeon 9000/9000 Pro - Secondary'
class = display

I thought it might be an AGP/kernel issue, but when I try 'kldload agp' I get back "File exists", and when I do 'kldstat -n agp' I get "No such file". I get the same "no such file" when I try 'kldunload agp'.

Would it make any difference if I tried to use XFree86 instead? I don't know what else to try.