framebuffer 第一次加电找不到模式

kernel /vmlinuz-2.6.19-r2 ro root=/dev/hda6 video=vesafb:ywrap,mtrr:3 vga=0x31B

第一次加电，说找不到0x31B模式。但如果重启，却可以按该模式启动。
[*] Enable firmware EDID │ │
│ │ <*> Support for frame buffer devices │ │
│ │[*] Enable Video Mode Handling Helpers │ │
│ │ [ ] Enable Tile Blitting Support │ │
│ │ < > Cirrus Logic support │ │
│ │ < > Permedia2 support │ │
│ │ < > CyberPro 2000/2010/5000 support │ │
│ │ < > Arc Monochrome LCD board support │ │
│ │ [ ] Asiliant (Chips) 69000 display support │ │
│ │ [ ] IMS Twin Turbo display support │ │
│ │ <*> VGA 16-color graphics support │ │
│ │ <*> VESA VGA graphics support │ │
│ │ VESA driver type (vesafb) --->


[ ] Backlight & LCD device support ---> │ │
│ │[*] Support for the framebuffer splash


--- VGA text console │ │
│ │ [ ] Enable Scrollback Buffer in System RAM │ │
│ │[*] Video mode selection support │ │
│ │ <*> Framebuffer Console support │ │
│ │ [ ] Framebuffer Console Rotation │ │
│ │[*] Select compiled-in fonts │ │
│ │[*] VGA 8x8 font │ │
│ │[*] VGA 8x16 font │ │
│ │ [ ] Mac console 6x11 font (not supported by all drivers) │ │
│ │ [ ] console 7x14 font (not supported by all drivers) │ │
│ │ [ ] Pearl (old m68k) console 8x8 font │ │
│ │ [ ] Acorn console 8x8 font │ │
│ │ [ ] Mini 4x6 font │ │
│ │ [ ] Sparc console 8x16 font │ │
│ │ [ ] Sparc console 12x22 font (not supported by all drivers) │ │
│ │ [ ] console 10x18 font (not supported by all drivers)

PHILIPS 109B6（19吋CRT）/nvidia 5700LE/~amd64