modinfo -p radeon
no_wb:Disable AGP writeback for scratch registers (int)
modeset:Disable/Enable modesetting (int)
dynclks:Disable/Enable dynamic clocks (int)
r4xx_atom:Enable ATOMBIOS modesetting for R4xx (int)
vramlimit:Restrict VRAM for testing, in megabytes (int)
agpmode:AGP Mode (-1 == PCI) (int)
gartsize:Size of PCIE/IGP gart to setup in megabytes (32, 64, etc., -1 = auto) (int)
benchmark:Run benchmark (int)
test:Run tests (int)
connector_table:Force connector table (int)
tv:TV enable (0 = disable) (int)
audio:Audio enable (-1 = auto, 0 = disable, 1 = enable) (int)
disp_priority:Display Priority (0 = auto, 1 = normal, 2 = high) (int)
hw_i2c:hw i2c engine enable (0 = disable) (int)
pcie_gen2:PCIE Gen2 mode (-1 = auto, 0 = disable, 1 = enable) (int)
msi:MSI support (1 = enable, 0 = disable, -1 = auto) (int)
lockup_timeout:GPU lockup timeout in ms (defaul 10000 = 10 seconds, 0 = disable) (int)
fastfb:Direct FB access for IGP chips (0 = disable, 1 = enable) (int)
dpm:DPM support (1 = enable, 0 = disable, -1 = auto) (int)
aspm:ASPM support (1 = enable, 0 = disable, -1 = auto) (int)
runpm:PX runtime pm (1 = force enable, 0 = disable, -1 = PX only default) (int)
hard_reset:PCI config reset (1 = force enable, 0 = disable (default)) (int)
vm_size:VM address space size in gigabytes (default 4GB) (int)
vm_block_size:VM page table size in bits (default depending on vm_size) (int)
deep_color:Deep Color support (1 = enable, 0 = disable (default)) (int)
use_pflipirq:Pflip irqs for pageflip completion (0 = disable, 1 = as fallback, 2 = exclusive (default)) (int)
bapm:BAPM support (1 = enable, 0 = disable, -1 = auto) (int)
backlight:backlight support (1 = enable, 0 = disable, -1 = auto) (int)