mem:X

size of memory (X can be in megabytes, kilobytes or bytes)You can only decrease value determined by driver because ofit always probe for memory. Default is to use whole detectedmemory usable for on-screen display (i.e. max. 8 MB).

disabled

do not load driver; you can use alsooff, butdisabledis here too.

enabled

load driver, if you havevideo=matroxfb:disabled in LILOconfiguration, you can override it by this (you cannot overrideoff). It is default.

noaccel

do not use acceleration engine. It does not work on Alphas.

accel

use acceleration engine. It is default.

nopan

create initial consoles with vyres = yres, thus disabling virtualscrolling.

pan

create initial consoles as tall as possible (vyres = memory/vxres).It is default.

nopciretry

disable PCI retries. It is needed for some broken chipsets,it is autodetected for intel’s 82437. In this case device doesnot comply to PCI 2.1 specs (it will not guarantee that everytransaction terminate with success or retry in 32 PCLK).

pciretry

enable PCI retries. It is default, except for intel’s 82437.

novga

disables VGA I/O ports. It is default if BIOS did not enabledevice. You should not use this option, some boards then do notrestart without power off.

vga

preserve state of VGA I/O ports. It is default. Driver does notenable VGA I/O if BIOS did not it (it is not safe to enable it inmost cases).

nobios

disables BIOS ROM. It is default if BIOS did not enable BIOSitself. You should not use this option, some boards then do notrestart without power off.

bios

preserve state of BIOS ROM. It is default. Driver does not enableBIOS if BIOS was not enabled before.

noinit

tells driver, that devices were already initialized. You should useit if you have G100 and/or if driver cannot detect memory, you seestrange pattern on screen and so on. Devices not enabled by BIOSare still initialized. It is default.

init

driver initializes every device it knows about.

memtype

specifies memory type, implies ‘init’. This is valid only for G200and G400 and has following meaning:

G200:

• 0 -> 2x128Kx32 chips, 2MB onboard, probably sgram

• 1 -> 2x128Kx32 chips, 4MB onboard, probably sgram

• 2 -> 2x256Kx32 chips, 4MB onboard, probably sgram

• 3 -> 2x256Kx32 chips, 8MB onboard, probably sgram

• 4 -> 2x512Kx16 chips, 8/16MB onboard, probably sdram only

• 5 -> same as above

• 6 -> 4x128Kx32 chips, 4MB onboard, probably sgram

• 7 -> 4x128Kx32 chips, 8MB onboard, probably sgram

G400:

• 0 -> 2x512Kx16 SDRAM, 16/32MB

• 2x512Kx32 SGRAM, 16/32MB

• 1 -> 2x256Kx32 SGRAM, 8/16MB

• 2 -> 4x128Kx32 SGRAM, 8/16MB

• 3 -> 4x512Kx32 SDRAM, 32MB

• 4 -> 4x256Kx32 SGRAM, 16/32MB

• 5 -> 2x1Mx32 SDRAM, 32MB

• 6 -> reserved

• 7 -> reserved

You should use sdram or sgram parameter in addition to memtypeparameter.

nomtrr

disables write combining on frame buffer. This slows down driverbut there is reported minor incompatibility between GUS DMA andXFree under high loads if write combining is enabled (sounddropouts).

mtrr

enables write combining on frame buffer. It speeds up videoaccesses much. It is default. You must have MTRR support enabledin kernel and your CPU must have MTRR (f.e. Pentium II have them).

sgram

tells to driver that you have Gxx0 with SGRAM memory. It has noeffect withoutinit.

sdram

tells to driver that you have Gxx0 with SDRAM memory.It is a default.

inv24

change timings parameters for 24bpp modes on Millennium andMillennium II. Specify this if you see strange color shadowsaround characters.

noinv24

use standard timings. It is the default.

inverse

invert colors on screen (for LCD displays)

noinverse

show true colors on screen. It is default.

dev:X

bind driver to device X. Driver numbers device from 0 up to N,where device 0 is firstknown device found, 1 second and so on.lspci lists devices in this order.Default isevery known device.

nohwcursor

disables hardware cursor (use software cursor instead).

hwcursor

enables hardware cursor. It is default. If you are usingnon-accelerated mode (noaccel orfbset -accel false), softwarecursor is used (except for text mode).

noblink

disables cursor blinking. Cursor in text mode always blinks (hwlimitation).

blink

enables cursor blinking. It is default.

nofastfont

disables fastfont feature. It is default.

fastfont:X

enables fastfont feature. X specifies size of memory reserved forfont data, it must be >= (fontwidth*fontheight*chars_in_font)/8.It is faster on Gx00 series, but slower on older cards.

grayscale

enable grayscale summing. It works in PSEUDOCOLOR modes (text,4bpp, 8bpp). In DIRECTCOLOR modes it is limited to charactersdisplayed through putc/putcs. Direct accesses to framebuffercan paint colors.

nograyscale

disable grayscale summing. It is default.

cross4MB

enables that pixel line can cross 4MB boundary. It is default fornon-Millennium.

nocross4MB

pixel line must not cross 4MB boundary. It is default forMillennium I or II, because of these devices have hardwarelimitations which do not allow this. But this option isincompatible with some (if not all yet released) versions ofXF86_FBDev.

dfp

enables digital flat panel interface. This option is incompatiblewith secondary (TV) output - if DFP is active, TV output must beinactive and vice versa. DFP always uses same timing as primary(monitor) output.

dfp:X

use settings X for digital flat panel interface. X is number from0 to 0xFF, and meaning of each individual bit is described inG400 manual, in description of DAC register 0x1F. For normaloperation you should set all bits to zero, except lowest bit. Thislowest bit selects who is source of display clocks, whether G400,or panel. Default value is now read back from hardware - so youshould specify this value only if you are also usinginitparameter.

outputs:XYZ

set mapping between CRTC and outputs. Each letter can have valueof 0 (for no CRTC), 1 (CRTC1) or 2 (CRTC2), and first lettercorresponds to primary analog output, second letter to thesecondary analog output and third letter to the DVI output.Default setting is 100 for cards below G400 or G400 without DFP,101 for G400 with DFP, and 111 for G450 and G550. You can setmapping only on first card, use matroxset for setting up otherdevices.

vesa:X

selects startup videomode. X is number from 0 to 0x1FF, see tableabove for detailed explanation. Default is 640x480x8bpp if driverhas 8bpp support. Otherwise first available of 640x350x4bpp,640x480x15bpp, 640x480x24bpp, 640x480x32bpp or 80x25 text(80x25 text is always available).

xres:X

horizontal resolution, in pixels. Default is derived fromvesaoption.

yres:X

vertical resolution, in pixel lines. Default is derived fromvesaoption.

upper:X

top boundary: lines between end of VSYNC pulse and start of firstpixel line of picture. Default is derived fromvesa option.

lower:X

bottom boundary: lines between end of picture and start of VSYNCpulse. Default is derived fromvesa option.

vslen:X

length of VSYNC pulse, in lines. Default is derived fromvesaoption.

left:X

left boundary: pixels between end of HSYNC pulse and first pixel.Default is derived fromvesa option.

right:X

right boundary: pixels between end of picture and start of HSYNCpulse. Default is derived fromvesa option.

hslen:X

length of HSYNC pulse, in pixels. Default is derived fromvesaoption.

pixclock:X

dotclocks, in ps (picoseconds). Default is derived fromvesaoption and fromfh andfv options.

sync:X

sync. pulse - bit 0 inverts HSYNC polarity, bit 1 VSYNC polarity.If bit 3 (value 0x08) is set, composite sync instead of HSYNC isgenerated. If bit 5 (value 0x20) is set, sync on green is turnedon. Do not forget that if you want sync on green, you also probablywant composite sync.Default depends onvesa.

depth:X

Bits per pixel: 0=text, 4,8,15,16,24 or 32. Default depends onvesa.

maxclk:X

maximum dotclock. X can be specified in MHz, kHz or Hz. Default isdon`t care.

fh:X

maximum horizontal synchronization frequency. X can be specifiedin kHz or Hz. Default isdon’t care.

fv:X

maximum vertical frequency. X must be specified in Hz. Default is70 for modes derived fromvesa with yres <= 400, 60Hz foryres > 400.