i945GM don't show video at vga port (blue screen)

[Wang Zhenyu]

On 2007.05.30 16:37:09 +0000, Drew Parsons wrote:
> After running xrandr --auto, --verbose now shows
> $ xrandr --verbose
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1920 x 1200
> VGA disconnected (normal left inverted right)
>         Identifier: 0x4c
>         Timestamp:  -617950609
>         Subpixel:   unknown
>         Clones:     
>         CRTCs:      0 1
> LVDS connected 1024x768+0+0 normal (normal left inverted right) 0mm x
> 0mm
>         Identifier: 0x4d
>         Timestamp:  -617950609
>         Subpixel:   horizontal rgb
>         Clones:     
>         CRTC:       1
>         CRTCs:      1
>         BACKLIGHT: 0 (0x00000000) range:  (0,0)
> ...<mode lines follow>
> 
> So VGA has now lost its "CRTC: 0"  entry.  But the video is still
> blue-screen.
> 

What's the output of xvinfo at that time? 

You may use xvattr tool to set XV_PIPE.