Hm, I remember that when I had this error :
[ 30.398673] NVRM: RmInitAdapter failed! (0x26:0xffffffff:1170)
[ 30.398682] NVRM: rm_init_adapter(0) failed
I had added "acpi_osi=" option (in order to get some hotkeys working) to grub line.
The error from the last post is when I did not add this option to grub line.