I have the same problem with my DELL Inspiron 1521 laptop and the patch doesn't fix the problem cause my video card reports another subsystem_device:
cat /sys/bus/pci/devices/0000:01:05.0/subsystem_device
0x01fc
So I just changed subsystem_device in the patch and now it works fine.
I have the same problem with my DELL Inspiron 1521 laptop and the patch doesn't fix the problem cause my video card reports another subsystem_device: pci/devices/ 0000:01: 05.0/subsystem_ device
cat /sys/bus/
0x01fc
So I just changed subsystem_device in the patch and now it works fine.