Comment 5 for bug 1039916

A better summary:

(gdb) p /x *nv_card
$13 = {card_name = 0x41332c, number = 0x0, caps = 0x0, device_id = 0x398, subvendor_id = 0x0, arch = 0x8000,
  reg_address = 0xd5000000, dev_name = 0x61e250, devbusfn = 0x100, irq = 0x10, base_freq = 0x0, gpu = 0x3, debug = 0x0,
  bios = 0x0, have_coolbits = 0x0, state = 0x0, mem_mapped = 0x0, PFB = 0x7ffff7ff7000, PBUS = 0x0, PDISPLAY = 0xffffffffffffffff,
  PMC = 0xffffffffffffffff, PRAMDAC = 0x7ffff7fe3000, PRAMIN = 0xffffffffffffffff, PEXTDEV = 0x7ffff7ff8000,
  PROM = 0x7ffff7fe5000, PCIO = 0x7ffff7ff5000, nvclk_min = 0x0, nvclk_max = 0x0, memclk_min = 0x0, memclk_max = 0x0,
  nvclk_3d = 0x0, memclk_3d = 0x0, get_gpu_architecture = 0x0, get_gpu_revision = 0x0, set_gpu_pci_id = 0x0, mem_type = 0x0,
  get_memory_type = 0x0, get_memory_width = 0x0, get_memory_size = 0x0, get_bus_type = 0x0, get_bus_rate = 0x0,
  get_agp_status = 0x0, get_agp_fw_status = 0x0, get_agp_sba_status = 0x0, get_agp_supported_rates = 0x0,
  get_pcie_max_bus_rate = 0x0, num_busses = 0x0, busses = {0x0, 0x0, 0x0, 0x0}, sensor = 0x0, sensor_name = 0x0,
  get_board_temp = 0x0, get_gpu_temp = 0x0, get_fanspeed = 0x0, set_fanspeed = 0x0, get_i2c_fanspeed_mode = 0x0,
  set_i2c_fanspeed_mode = 0x0, get_i2c_fanspeed_rpm = 0x0, get_i2c_fanspeed_pwm = 0x0, set_i2c_fanspeed_pwm = 0x0,
  get_default_mask = 0x0, get_hw_masked_units = 0x0, get_sw_masked_units = 0x0, get_pixel_pipelines = 0x0,
  set_pixel_pipelines = 0x0, get_vertex_pipelines = 0x0, set_vertex_pipelines = 0x0, get_shader_speed = 0x0,
  set_shader_speed = 0x0, reset_shader_speed = 0x0, get_stream_units = 0x0, get_rop_units = 0x0, get_smartdimmer = 0x0,
  set_smartdimmer = 0x0, mpll = 0x0, mpll2 = 0x0, nvpll = 0x0, nvpll2 = 0x0, set_state = 0x0, get_gpu_speed = 0x0,
  set_gpu_speed = 0x0, get_memory_speed = 0x0, set_memory_speed = 0x0, reset_gpu_speed = 0x0, reset_memory_speed = 0x0,
  get_debug_info = 0x0}