Nouveau Kernel Module Parameters
For an up-to-date list of parameters, run modinfo nouveau
in your terminal. Below a slightly more detailed list of some of the 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
(removed in 4.5)
Specify nouveau.pstate=1
in order to be able to switch performance levels at runtime via /sys/class/drm/cardN/device/pstate
. Starting in 4.5, this is available by default in debugfs, at /sys/kernel/debug/dri/*/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 integers (use 0/1 for booleans) except for NvBios
which is a string.
- $engine: Whether to enable/disable the engine, e.g. PDISP=0
NvAGP
: The agp mode (0 for disable) to force (starting with 4.3)NvBios
: Specify VBIOS source as one ofOpenFirmware/PRAMIN/PROM/ACPI/PCIROM/PLATFORM
, or a filename passed to request_firmwareNvBoost
: Specify the Boost mode for Fermi and newer. 0: base clocks (default) 1: boost clocks 2: max clocks (starting with 4.10)NvClkMode
: Force a particular clock level on boot. Note that this does not parse hex, so for clock modef
, pass in15
.NvClkModeAC
: Same asNvClkMode
, when the power is plugged inNvClkModeDC
: Same asNvClkMode
, when running off batteryNvFanPWM
: Enable use of PWM for the fan, auto-detect by defaultNvForcePost
: Whether to force a POST of the device, off by defaultNvGrUseFW
: Whether to load FW for PGRAPH on NVC0NvI2C
: ??, off by defaultNvMemExec
: Perform memory reclockingNvMSI
: Use MSI interrupts, on by default on the chipsets that support itNvMXMDCB
: Sanitize DCB outputs from the BIOS, on by defaultNvPCIE
: NV40 family only, whether to use PCI-E GART, on by defaultNvPmEnableGating
: Enables clockgating for Kepler GPUs
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
(removed in 4.3)
AGP mode, 0 to disable AGP
vram_pushbuf
Create DMA push buffers in VRAM
ignorelid
Ignore ACPI lid status
duallink
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