Здравствуйте....
1.Видеокарта - GeForce 8400GS
2. 2 монитора TFT Samsung
Решил поставить openbsd4.4 как desktop версию
Установил, сделал перваначальные настройки...
Поставил кде встала ура!!! я это сделал...
решил расширить рабочий стол поключив второй монитор...
Получилось два монитора работают в режиме клон....
Теперь мне надо сделать в big desktop....
Давай гуглить и лопатить маны
Нашел статью .... http://www.obsd.ru/8/?q=node/1178
Создал файл xorg.conf вручную, собрал кофиг положил все это на свое железо ...перезапуск
все равно клон ((
Подскажите уважаемые может я че та не так делаю...???
А то статей в нете валом но в основном идут под линух или фряху а они используют
twinview и Xinerama
Привожу конфиг и лог к нему:
Section "ServerLayout"
Identifier "Simple Layout"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
# InputDevice "Mouse1" "CorePointer" по умолчанию "работает"
# InputDevice "Keyboard1" "CoreKeyboard" по умолчанию "работает"
EndSection
Section "Monitor"
Identifier "Samsung0"
HorizSync 31.5-64.3
VertRefresh 50.0-70.0
ModeLine "1280x1024" 108.0 1280 1328 1440 1688 1024 1025 1028 1068 +hsync +vsync
EndSection
Section "Monitor"
Identifier "Samsung1"
HorizSync 31.5-64.3
VertRefresh 50.0-70.0
ModeLine "1280x1024" 108.0 1280 1328 1440 1688 1024 1025 1028 1068 +hsync +vsync
EndSection
Section "Device"
Identifier "GeForce 8400GS"
Driver "nv"
VideoRAM 256000
BusID "PCI:03:00:00"
Option "BusType" "PCIE"
Option "MonitorLayout" "TMDS,TMDS"
Option "MergedFB" "TRUE"
Option "MetaModes" "1280x1024-1280x1024"
Option "CRT2Position" "RightOf"
Option "CRT2HSync" "31.5-64.3"
Option "CRT2VRefresh" "50.0-70.0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "GeForce 8400GS"
Monitor "Samsung0"
SubSection "Display"
Viewport 0 0
Depth 24
Virtual 2560 1024
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "GeForce 8400GS"
Monitor "Samsung1"
EndSection
логи:
(--) checkDevMem: using aperture driver /dev/xf86
(--) Using wscons driver on /dev/ttyC4 in pcvt compatibility mode (version 3.32)
X.Org X Server 1.4.2
Release Date: 11 June 2008
X Protocol Version 11, Revision 0
Build Operating System: OpenBSD 4.4 i386
Current Operating System: OpenBSD GOD.loopss.net 4.4 GENERIC#1021 i386
Build Date: 06 August 2008 10:45:35PM
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Fri Jul 31 20:12:20 2009
(==) Using config file: "/etc/X11/xorg.conf"
(==) ServerLayout "Simple Layout"
(**) |-->Screen "Screen0" (0)
(**) | |-->Monitor "Samsung0"
(**) | |-->Device "GeForce 8400GS"
(**) |-->Screen "Screen1" (1)
(**) | |-->Monitor "Samsung1"
(**) | |-->Device "GeForce 8400GS"
(==) Automatically adding devices
(==) Automatically enabling devices
(==) No FontPath specified. Using compiled-in default.
(==) FontPath set to:
/usr/X11R6/lib/X11/fonts/misc/,
/usr/X11R6/lib/X11/fonts/TTF/,
/usr/X11R6/lib/X11/fonts/OTF,
/usr/X11R6/lib/X11/fonts/Type1/,
/usr/X11R6/lib/X11/fonts/100dpi/,
/usr/X11R6/lib/X11/fonts/75dpi/
(==) RgbPath set to "/usr/X11R6/share/X11/rgb"
(==) ModulePath set to "/usr/X11R6/lib/modules"
(==) |-->Input Device "<default pointer>"
(==) |-->Input Device "<default keyboard>"
(==) The core pointer device wasn't specified explicitly in the layout.
Using the default mouse configuration.
(==) The core keyboard device wasn't specified explicitly in the layout.
Using the default keyboard configuration.
(II) Loader magic: 0x3c01c9e0
(II) Module ABI versions:
X.Org ANSI C Emulation: 0.3
X.Org Video Driver: 2.0
X.Org XInput driver : 2.0
X.Org Server Extension : 0.3
X.Org Font Renderer : 0.5
(II) Loader running on openbsd
(II) LoadModule: "pcidata"
(II) Loading /usr/X11R6/lib/modules//libpcidata.so
(II) Module pcidata: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
ABI class: X.Org Video Driver, version 2.0
(WW) OS did not count PCI devices, guessing wildly
(II) PCI: PCI scan (all values are in hex)
(II) PCI-to-ISA bridge:
(II) Bus -1: bridge is at (0:1:0), (0,-1,-1), BCTRL: 0x0008 (VGA_EN is set)
(II) Subtractive PCI-to-PCI bridge:
(II) Bus 1: bridge is at (0:6:0), (0,1,1), BCTRL: 0x0a04 (VGA_EN is cleared)
(II) Bus 1 non-prefetchable memory range:
[0] -1 0 0xfde00000 - 0xfdefffff (0x100000) MX
(II) PCI-to-PCI bridge:
(II) Bus 2: bridge is at (0:14:0), (0,2,2), BCTRL: 0x0004 (VGA_EN is cleared)
(II) Bus 2 I/O range:
[0] -1 0 0x00008000 - 0x000080ff (0x100) IX
[1] -1 0 0x00008400 - 0x000084ff (0x100) IX
[2] -1 0 0x00008800 - 0x000088ff (0x100) IX
[3] -1 0 0x00008c00 - 0x00008cff (0x100) IX
[4] -1 0 0x00009000 - 0x000090ff (0x100) IX
[5] -1 0 0x00009400 - 0x000094ff (0x100) IX
[6] -1 0 0x00009800 - 0x000098ff (0x100) IX
[7] -1 0 0x00009c00 - 0x00009cff (0x100) IX
(II) Bus 2 non-prefetchable memory range:
[0] -1 0 0xfdd00000 - 0xfddfffff (0x100000) MX
(II) PCI-to-PCI bridge:
(II) Bus 3: bridge is at (0:15:0), (0,3,3), BCTRL: 0x001c (VGA_EN is set)
(II) Bus 3 I/O range:
[0] -1 0 0x00007000 - 0x000070ff (0x100) IX
[1] -1 0 0x00007400 - 0x000074ff (0x100) IX
[2] -1 0 0x00007800 - 0x000078ff (0x100) IX
[3] -1 0 0x00007c00 - 0x00007cff (0x100) IX
(II) Bus 3 non-prefetchable memory range:
[0] -1 0 0xf8000000 - 0xfbffffff (0x4000000) MX
(II) Bus 3 prefetchable memory range:
[0] -1 0 0xe0000000 - 0xefffffff (0x10000000) MX
(II) Host-to-PCI bridge:
(II) Bus 0: bridge is at (0:24:0), (0,0,3), BCTRL: 0x0008 (VGA_EN is set)
(II) Bus 0 I/O range:
[0] -1 0 0x00000000 - 0x0000ffff (0x10000) IX
(II) Bus 0 non-prefetchable memory range:
[0] -1 0 0x00000000 - 0xffffffff (0x0) MX
(II) Bus 0 prefetchable memory range:
[0] -1 0 0x00000000 - 0xffffffff (0x0) MX
(--) PCI:*(3:0:0) nVidia Corporation GeForce 8400 GS rev 161, Mem @ 0xfa000000/24, 0xe0000000/28, 0xf8000000/25, I/O @ 0x7c00/7, BIOS @ 0xfbfe0000/17
(II) LoadModule: "extmod"
(II) Loading /usr/X11R6/lib/modules/extensions//libextmod.so
(II) Module extmod: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 0.3
(II) Loading extension SHAPE
(II) Loading extension MIT-SUNDRY-NONSTANDARD
(II) Loading extension BIG-REQUESTS
(II) Loading extension SYNC
(II) Loading extension MIT-SCREEN-SAVER
(II) Loading extension XC-MISC
(II) Loading extension XFree86-VidModeExtension
(II) Loading extension XFree86-Misc
(II) Loading extension XFree86-DGA
(II) Loading extension DPMS
(II) Loading extension TOG-CUP
(II) Loading extension Extended-Visual-Information
(II) Loading extension XVideo
(II) Loading extension XVideo-MotionCompensation
(II) Loading extension X-Resource
(II) LoadModule: "dbe"
(II) Loading /usr/X11R6/lib/modules/extensions//libdbe.so
(II) Module dbe: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 0.3
(II) Loading extension DOUBLE-BUFFER
(II) LoadModule: "glx"
(II) Loading /usr/X11R6/lib/modules/extensions//libglx.so
(II) Module glx: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
ABI class: X.Org Server Extension, version 0.3
(==) AIGLX enabled
(II) Loading extension GLX
(II) LoadModule: "freetype"
(II) Loading /usr/X11R6/lib/modules/fonts//libfreetype.so
(II) Module freetype: vendor="X.Org Foundation & the After X-TT Project"
compiled for 1.4.2, module version = 2.1.0
Module class: X.Org Font Renderer
ABI class: X.Org Font Renderer, version 0.5
(II) Loading font FreeType
(II) LoadModule: "type1"
(II) Loading /usr/X11R6/lib/modules/fonts//libtype1.so
(II) Module type1: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.2
Module class: X.Org Font Renderer
ABI class: X.Org Font Renderer, version 0.5
(II) Loading font Type1
(II) LoadModule: "record"
(II) Loading /usr/X11R6/lib/modules/extensions//librecord.so
(II) Module record: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.13.0
Module class: X.Org Server Extension
ABI class: X.Org Server Extension, version 0.3
(II) Loading extension RECORD
(II) LoadModule: "dri"
(II) Loading /usr/X11R6/lib/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
ABI class: X.Org Server Extension, version 0.3
(II) Loading extension XFree86-DRI
(II) LoadModule: "nv"
(II) Loading /usr/X11R6/lib/modules/drivers//nv_drv.so
(II) Module nv: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 2.1.10
Module class: X.Org Video Driver
ABI class: X.Org Video Driver, version 2.0
(II) LoadModule: "mouse"
(II) Loading /usr/X11R6/lib/modules/input//mouse_drv.so
(II) Module mouse: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.2.3
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 2.0
(II) LoadModule: "kbd"
(II) Loading /usr/X11R6/lib/modules/input//kbd_drv.so
(II) Module kbd: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.2.2
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 2.0
(II) NV: driver for NVIDIA chipsets: RIVA 128, RIVA TNT, RIVA TNT2,
Unknown TNT2, Vanta, RIVA TNT2 Ultra, RIVA TNT2 Model 64,
Aladdin TNT2, GeForce 256, GeForce DDR, Quadro, GeForce2 MX/MX 400,
GeForce2 MX 100/200, GeForce2 Go, Quadro2 MXR/EX/Go,
GeForce2 Integrated GPU, GeForce2 GTS, GeForce2 Ti, GeForce2 Ultra,
Quadro2 Pro, GeForce4 MX 460, GeForce4 MX 440, GeForce4 MX 420,
GeForce4 MX 440-SE, GeForce4 440 Go, GeForce4 420 Go,
GeForce4 420 Go 32M, GeForce4 460 Go, Quadro4 550 XGL,
GeForce4 440 Go 64M, Quadro NVS, Quadro4 500 GoGL,
GeForce4 410 Go 16M, GeForce4 MX 440 with AGP8X,
GeForce4 MX 440SE with AGP8X, GeForce4 MX 420 with AGP8X,
GeForce4 MX 4000, GeForce4 448 Go, GeForce4 488 Go, Quadro4 580 XGL,
Quadro4 NVS 280 SD, Quadro4 380 XGL, Quadro NVS 50 PCI,
GeForce4 448 Go, GeForce4 MX Integrated GPU, GeForce3,
GeForce3 Ti 200, GeForce3 Ti 500, Quadro DCC, GeForce4 Ti 4600,
GeForce4 Ti 4400, GeForce4 Ti 4200, Quadro4 900 XGL, Quadro4 750 XGL,
Quadro4 700 XGL, GeForce4 Ti 4800, GeForce4 Ti 4200 with AGP8X,
GeForce4 Ti 4800 SE, GeForce4 4200 Go, Quadro4 700 GoGL,
Quadro4 980 XGL, Quadro4 780 XGL, GeForce FX 5800 Ultra,
GeForce FX 5800, Quadro FX 2000, Quadro FX 1000,
GeForce FX 5600 Ultra, GeForce FX 5600, GeForce FX 5600XT,
GeForce FX Go5600, GeForce FX Go5650, Quadro FX Go700,
GeForce FX 5200, GeForce FX 5200 Ultra, GeForce FX 5200,
GeForce FX 5200LE, GeForce FX Go5200, GeForce FX Go5250,
GeForce FX 5500, GeForce FX 5100, GeForce FX Go5200 32M/64M,
Quadro NVS 55/280 PCI, Quadro FX 500/600 PCI,
GeForce FX Go53xx Series, GeForce FX Go5100, GeForce FX 5900 Ultra,
GeForce FX 5900, GeForce FX 5900XT, GeForce FX 5950 Ultra,
GeForce FX 5900ZT, Quadro FX 3000, Quadro FX 700,
GeForce FX 5700 Ultra, GeForce FX 5700, GeForce FX 5700LE,
GeForce FX 5700VE, GeForce FX Go5700, GeForce FX Go5700,
Quadro FX Go1000, Quadro FX 1100, GeForce 6800 Ultra, GeForce 6800,
GeForce 6800 LE, GeForce 6800 XE, GeForce 6800 XT, GeForce 6800 GT,
GeForce 6800 GT, GeForce 6800 GS, GeForce 6800 XT, Quadro FX 4000,
GeForce 6800 GS, GeForce 6800, GeForce 6800 LE, GeForce 6800 XT,
GeForce Go 6800, GeForce Go 6800 Ultra, Quadro FX Go1400,
Quadro FX 3450/4000 SDI, Quadro FX 1400, GeForce 6600 GT,
GeForce 6600, GeForce 6600 LE, GeForce 6600 VE, GeForce Go 6600,
GeForce 6610 XL, GeForce Go 6600 TE/6200 TE, GeForce 6700 XL,
GeForce Go 6600, GeForce Go 6600 GT, Quadro FX 550, Quadro FX 550,
Quadro FX 540, GeForce 6200, GeForce 6500,
GeForce 6200 TurboCache(TM), GeForce 6200SE TurboCache(TM),
GeForce 6200 LE, GeForce Go 6200, Quadro NVS 285, GeForce Go 6400,
GeForce Go 6200, GeForce Go 6400, GeForce 6250, GeForce 6800,
GeForce 6800 LE, GeForce 6800 GT, GeForce 6800 XT, GeForce 6200,
GeForce 6200 A-LE, GeForce 7800 GTX, GeForce 7800 GTX,
GeForce 7800 GT, GeForce 7800 GS, GeForce 7800 SLI, GeForce Go 7800,
GeForce Go 7800 GTX, Quadro FX 4500, GeForce 7300 LE,
GeForce 7300 SE, GeForce Go 7200, GeForce Go 7300, GeForce Go 7400,
GeForce Go 7400 GS, Quadro NVS 110M, Quadro NVS 120M, Quadro FX 350M,
GeForce 7500 LE, Quadro FX 350, GeForce 7300 GS, GeForce 7600 GT,
GeForce 7600 GS, GeForce 7300 GT, GeForce 7600 LE, GeForce 7300 GT,
GeForce Go 7700, GeForce Go 7600, GeForce Go 7600 GT,
Quadro NVS 300M, GeForce Go 7900 SE, Quadro FX 550M, Quadro FX 560,
GeForce 7900 GTX, GeForce 7900 GT, GeForce 7900 GS,
GeForce Go 7900 GS, GeForce Go 7900 GTX, Quadro FX 2500M,
Quadro FX 1500M, Quadro FX 5500, Quadro FX 3500, Quadro FX 1500,
Quadro FX 4500 X2, GeForce 6150, GeForce 6150 LE, GeForce 6100,
GeForce Go 6150, GeForce Go 6100, GeForce 8800 GTX, GeForce 8800 GTS,
GeForce 8800 Ultra, Quadro FX 5600, Quadro FX 4600, GeForce 8600 GTS,
GeForce 8600 GT, GeForce 8600 GT, GeForce 8400 GS, GeForce 9500M GS,
GeForce 8600M GT, GeForce 9650M GS, GeForce 8700M GT, Quadro FX 370,
Quadro NVS 320M, Quadro FX 570M, Quadro FX 1600M, Quadro FX 570,
Quadro FX 1700, GeForce 8400 SE, GeForce 8500 GT, GeForce 8400 GS,
GeForce 8300 GS, GeForce 8400 GS, GeForce 8600M GS, GeForce 8400M GT,
GeForce 8400M GS, GeForce 8400M G, Quadro NVS 140M, Quadro NVS 130M,
Quadro NVS 135M, Quadro FX 360M, Quadro NVS 290, GeForce 8800 GT
(II) Primary Device is: PCI 03:00:0
(WW) NV: More than one matching Device section for instances
(BusID: PCI:03:00:00) found: GeForce 8400GS
(--) Chipset GeForce 8400 GS found
(II) Setting vga for screen 0.
(II) Loading sub module "int10"
(II) LoadModule: "int10"
(II) Loading /usr/X11R6/lib/modules//libint10.so
(II) Module int10: vendor="X.Org Foundation"
compiled for 1.4.2, module version = 1.0.0
ABI class: X.Org Video Driver, version 2.0
(II) NV(0): Initializing int10
(WW) NV(0): remove MTRR a0000 - c0000
(==) NV(0): Write-combining range (0xa0000,0x20000) was already clear
(WW) NV(0): remove MTRR c0000 - 100000
(==) NV(0): Write-combining range (0xc0000,0x40000) was already clear
(II) NV(0): Primary V_BIOS segment is: 0xc000
(WW) NV(0): remove MTRR 0 - 1000
(==) NV(0): Write-combining range (0x0,0x1000) was already clear
(--) NV(0): Console is VGA mode 0x3
(==) NV(0): Depth 24, (==) framebuffer bpp 32
(==) NV(0): RGB weight 888
(==) NV(0): Default visual is TrueColor
(==) NV(0): Using hardware cursor
(==) NV(0): Using gamma correction (1.0, 1.0, 1.0)
(WW) NV(0): remove MTRR fa000000 - fb000000
(==) NV(0): Write-combining range (0xfa000000,0x1000000) was already clear
(II) NV(0): MMIO registers mapped at 0x82fbb000
(--) NV(0): Total video RAM: 256.0 MB
(--) NV(0): BAR1 size: 256.0 MB
(--) NV(0): Mapped memory: 255.0 MB
(WW) NV(0): remove MTRR e0000000 - eff00000
(==) NV(0): Write-combining range (0xe0000000,0xff00000) was already clear
(II) NV(0): Linear framebuffer mapped at 0x8b9ec000
(II) Loading sub module "i2c"
(II) LoadModule: "i2c"(II) Module "i2c" already built-in
(II) Loading sub module "ddc"
(II) NV(0): Supported Future Video Modes:
(II) NV(0): #0: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
(II) NV(0): #1: hsize: 1152 vsize 864 refresh: 75 vid: 20337
(II) NV(0): Supported additional Video Mode:
(II) NV(0): clock: 108.0 MHz Image Size: 376 x 301 mm
(II) NV(0): h_active: 1280 h_sync: 1328 h_sync_end 1440 h_blank_end 1688 h_border: 0
(II) NV(0): v_active: 1024 v_sync: 1025 v_sync_end 1028 v_blanking: 1066 v_border: 0
(II) NV(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81 kHz, PixClock max 140 MHz
(II) NV(0): EDID vendor "SAM", prod id 277
(II) NV(0): Probing for EDID on I2C bus 1...
(--) NV(0): DDC detected a CRT:
(II) NV(0): Manufacturer: SAM Model: 1e1 Serial#: 1212231993
(II) NV(0): Year: 2007 Week: 47
(II) NV(0): EDID Version: 1.3
(II) NV(0): Analog Display Input, Input Voltage Level: 0.700/0.300 V
(II) NV(0): Sync: Separate Composite SyncOnGreen
(II) NV(0): Max H-Image Size [cm]: horiz.: 38 vert.: 30
(II) NV(0): Gamma: 2.20
(II) NV(0): DPMS capabilities: Off; RGB/Color Display
(II) NV(0): First detailed timing is preferred mode
(II) NV(0): redX: 0.640 redY: 0.329 greenX: 0.300 greenY: 0.600
(II) NV(0): blueX: 0.150 blueY: 0.060 whiteX: 0.313 whiteY: 0.329
(II) NV(0): Supported VESA Video Modes:
(II) NV(0): 720x400@70Hz
(II) NV(0): 640x480@60Hz
(II) NV(0): 640x480@67Hz
(II) NV(0): 640x480@72Hz
(II) NV(0): 640x480@75Hz
(II) NV(0): 800x600@56Hz
(II) NV(0): 800x600@60Hz
(II) NV(0): 800x600@72Hz
(II) NV(0): 800x600@75Hz
(II) NV(0): 832x624@75Hz
(II) NV(0): 1024x768@60Hz
(II) NV(0): 1024x768@70Hz
(II) NV(0): 1024x768@75Hz
(II) NV(0): 1280x1024@75Hz
(II) NV(0): 1152x870@75Hz
(II) NV(0): Manufacturer's mask: 0
(II) NV(0): Supported Future Video Modes:
(II) NV(0): #0: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
(II) NV(0): #1: hsize: 1280 vsize 960 refresh: 60 vid: 16513
(II) NV(0): #2: hsize: 1152 vsize 864 refresh: 75 vid: 20337
(II) NV(0): Supported additional Video Mode:
(II) NV(0): clock: 108.0 MHz Image Size: 376 x 301 mm
(II) NV(0): h_active: 1280 h_sync: 1328 h_sync_end 1440 h_blank_end 1688 h_border: 0
(II) NV(0): v_active: 1024 v_sync: 1025 v_sync_end 1028 v_blanking: 1066 v_border: 0
(II) NV(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81 kHz, PixClock max 140 MHz
(II) NV(0): Monitor name: SyncMaster
(II) NV(0): Serial No: HVKPB21427
(II) NV(0): EDID (in hex):
(II) NV(0): 00ffffffffffff004c2de10139314148
(II) NV(0): 2f1101030e261e782ade95a3544c9926
(II) NV(0): 0f5054bfef8081808140714f01010101
(II) NV(0): 010101010101302a009851002a403070
(II) NV(0): 1300782d1100001e000000fd00384b1e
(II) NV(0): 510e000a202020202020000000fc0053
(II) NV(0): 796e634d61737465720a2020000000ff
(II) NV(0): 0048564b504232313432370a20200090
(--) NV(0): Trying load detection on VGA0 ... found one!
(II) NV(0): EDID vendor "SAM", prod id 481