In my opinion, the problem was in bumblebee 3.0. Without this and with disabled NVIDIA card in BIOS, I could boot and boot times were varying from fast to slow but I always boot. With bumblebee 3.0 I was unable to boot in most cases.
With bumblebee 3.1 with primus support enabled it seems OK but it needs aditional testing.
Ubuntu 12.10 64bit
Lenovo Z580
In my opinion, the problem was in bumblebee 3.0. Without this and with disabled NVIDIA card in BIOS, I could boot and boot times were varying from fast to slow but I always boot. With bumblebee 3.0 I was unable to boot in most cases.
With bumblebee 3.1 with primus support enabled it seems OK but it needs aditional testing.
Ubuntu 12.10 64bit
Lenovo Z580