Well, I guess it's a Vista or video driver issue and not a DeltaCad issue.
Unfortunately I've heard of incompatibility issues regarding Vista and hardware drivers. This is one of those times that either Microsoft or the hardware manufacturer needs to resolve. I've heard of this happening even with drivers that are supposed to work with Vista. When Microsoft releases a new OS, it's usually buggier than an old log. With Vista, it's even worse, as some programs that worked great in XP or earlier OS's just don't get along well with Vista. DeltaCad claims it is compatible so, I'd be watching for Vista and/or driver updates.
Just a thought, and highly unlikely, but it could also be a memory issue. Either video RAM or system RAM, that may not be working correctly. See if you can do a full RAM test to see if there may be a defective chip. All it takes is one missing byte or bit to cause a lock during a RAM read or write operation.
I hope you can get it working correctly on your Vista machine soon.
Unfortunately I've heard of incompatibility issues regarding Vista and hardware drivers. This is one of those times that either Microsoft or the hardware manufacturer needs to resolve. I've heard of this happening even with drivers that are supposed to work with Vista. When Microsoft releases a new OS, it's usually buggier than an old log. With Vista, it's even worse, as some programs that worked great in XP or earlier OS's just don't get along well with Vista. DeltaCad claims it is compatible so, I'd be watching for Vista and/or driver updates.
Just a thought, and highly unlikely, but it could also be a memory issue. Either video RAM or system RAM, that may not be working correctly. See if you can do a full RAM test to see if there may be a defective chip. All it takes is one missing byte or bit to cause a lock during a RAM read or write operation.
I hope you can get it working correctly on your Vista machine soon.