Hmm. Is vga=0x317 no longer set? I believe Takashi wanted to know whether the generic framebuffer is still working. So I suggest to try with vga=0x318 nomodeset and then hardcode "fbdev" X driver. Just using video=1680x1050 will set the mode for KMS (kernel mode setting), *not* generic framebuffer --> "modeset" X driver. Also. hwinfo --framebuffer will tell you the right mode for native resolution. This is not standardized for resolutions > 1280x1024.