Nouveau Kernel Module Parameters

Each of these parameters expects a value. Most are simple booleans, and can be set with foo=1 for enable or foo=0 for disable. The rest have detailed explanations of the values they're allowed to take on.

perflvl/perflvl_wr (removed in 3.13)

Specify nouveau.perflvl_wr=7777 in order to be able to switch performance levels at runtime via /sys/class/drm/cardN/device/performance_level. You can also specify nouveau.perflvl=N to switch to a specific performance level on boot.

pstate

Specify nouveau.pstate=1 in order to be able to switch performance levels at runtime via /sys/class/drm/cardN/device/pstate.

WARNING: Power management is a very experimental feature and is not expected to work. If you decided to upclock your GPU, please aknowledge that your card may overheat. Please check the temperature of your GPU at all time!

runpm

Force enable 1 or disable 0, runtime power-managment. The default only for Optimus systems is -1.

noaccel

Disable kernel/abi16 acceleration (i.e. 1 for disable acceleration, 0 for enable).

nofbaccel

Disable fbcon acceleration (i.e. 1 for disable acceleration, 0 for enable).

modeset

Whether the driver should be enabled. 0 for disabled, 1 for enabled, 2 for headless

config

This provides a way to configure various parts of the driver, it is a comma-separate list of a=b key/value pairs. The values are all boolean (0/1) except for NvBios which is a string.

  • $engine: Whether to enable/disable the engine, e.g. PDISP=0
  • NvGrUseFW: Whether to load FW for PGRAPH on NVC0
  • NvBios: Specify VBIOS source as one of OpenFirmware/PRAMIN/PROM/ACPI/PCIROM/PLATFORM, or a filename passed to request_firmware
  • NvForcePost: Whether to force a POST of the device, off by default
  • NvI2C: ??, off by default
  • NvMXMDCB: Sanitize DCB outputs from the BIOS, on by default
  • NvFanPWM: Enable use of PWM for the fan, auto-detect by default
  • NvPCIE: NV40 family only, whether to use PCI-E GART, on by default
  • NvMemExec: Perform memory reclocking
  • NvMSI: Use MSI interrupts, on by default on the chipsets that support it

Here is a list of engines:

  • DEVICE
  • DMAOBJ
  • PBSP
  • PCE0
  • PCE1
  • PCE2
  • PCRYPT
  • PDISP
  • PFIFO
  • PGRAPH
  • PMPEG
  • PPM
  • PPPP
  • PVP
  • SW

debug

This works just like the config option, but the values are all debug levels (one of fatal, error, warn, info, debug, trace, paranoia, spam). Note that in order for a debug level to work, CONFIG_NOUVEAU_DEBUG must be set to at least that level.

  • CLIENT
  • $subdev (e.g. PDISP=debug)

Here is a list of the available subdevices:

  • BARCTL
  • DEVINIT
  • GPIO
  • I2C
  • INSTMEM
  • MXM
  • PBUS
  • PIBUS
  • PLTCG
  • PTHERM
  • PTIMER
  • VBIOS
  • any engine (see above)

Example: nouveau.debug="PTHERM=debug,PTIMER=debug"

agpmode

AGP mode, 0 to disable AGP

vram_pushbuf

Create DMA push buffers in VRAM

ignorelid

Ignore ACPI lid status

Allow dual-link TMDS (on by default)

tv_norm

Default TV norm. Default is PAL. Valid values: PAL, PAL-M, PAL-N, PAL-Nc, NTSC-M, NTSC-J, hd480i, hd480p, hd576i, hd576p, hd720p, hd1080i.

This only applies to cards that don't have external encoders.

tv_disable

Disable TV-out detection