Grandtec Grand X Guard

X-Guard 4-Port

Autodetected correctly.

X-Guard 9-Port

Confirmed working under ZoneMinder 1.22 (probably earlier). bttv driver 0.9.17 incorrectly detects this as a card type 57. You need to edit modprobe.conf (see below), then do a rmmod bttv and modprobe bttv to get it to work correctly.

"/etc/modprobe.conf"

options bttv card=103 

I haven't had any problems testing with a single input but with each input added, the image gets brighter and more washed out. At 4 monitors, the image is no longer viewable with the default monitor brightness and contrast. Current theory is that providing input to the card under the additional monitors will resolve the issue.