その後。 繋いでみたら出ました。よかった。
[~]$ uname -srvi SunOS 5.10 Generic SUNW,Sun-Blade-2500 [~]$ fbconfig -prconf --- Hardware Configuration for /dev/fb --- Type: XVR-100 ASIC: version 0x5159 REV: version 0x3000000 PROM: version 1.5 Monitor/Resolution Information: Monitor A: EDID Data: Not Available Current resolution setting: 1152x900x66 Current depth: 8 Monitor B: Monitor Manufacturer: ENC Product code: 6145 Serial #: 16843009 Manufacture date: 2006, week 7 Monitor dimensions: 52x33 cm Monitor preferred resolution: 1920x1200x60 Seperate sync supported: no Composite sync supported: no Gamma: 2.20 EDID: Version 1, Revision 3 Supported resolutions: 1920x1200x60, 1600x1200x60, VESA_STD_1280x1024x60, 1280x960x60, 1680x1050x60, VESA_STD_720x400x70, VESA_STD_640x480x60, VESA_STD_800x600x60, VESA_STD_1024x768x70 Current resolution setting: 1920x1200x60 Current depth: 24 Depth Information: Possible depths: 8, 24