Re: 295.40 breaks vbiosd
It's fixed in Oracle's version not available for free download. This goes back probably around 4 or 5 releases so far. Nvidia hasn't fixed it yet. The problem was reported to Nvidia about 3 months ago.
Also, it's not a critical bug:
"vbiosd is responsible for restoring the console video mode
when X is shut down or switching VTs. Since you are using
the driver from nvidia.com you won't get fastreboot so the
console mode will be restored by the BIOS. Worst problem
here is you may not see messages when Solaris is being
shut down. If you have VTs enabled they should still work
if you have booted with console=force-text"