Created attachment 15773 [details]
xorg log file

Source:
xserver, libXrandr, randrproto, xrandr : transform-proposal branch
xf86-video-intel: projective-965 branch

My 945GM machine has three output:VGA, LVDS and TV.
If VGA not connected, X crashed when run xrandr commands, like "xrandr -q". Following is the backtrace info:

It seems that X stepped into dead loop:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1209301312 (LWP 8208)]
0x080e8d26 in xf86RotateBlockHandler (screenNum=0, blockData=0x0,
    pTimeout=0xbff1c6a8, pReadmask=0x81ef0e0) at xf86Rotate.c:273
273     {
(gdb) bt
#0  0x080e8d26 in xf86RotateBlockHandler (screenNum=0, blockData=0x0,
    pTimeout=0xbff1c6a8, pReadmask=0x81ef0e0) at xf86Rotate.c:273
#1  0x080e8d68 in xf86RotateBlockHandler (screenNum=0, blockData=0x0,
    pTimeout=0xbff1c6a8, pReadmask=0x81ef0e0) at xf86Rotate.c:278
#2  0x080e8d68 in xf86RotateBlockHandler (screenNum=0, blockData=0x0,
    pTimeout=0xbff1c6a8, pReadmask=0x81ef0e0) at xf86Rotate.c:278

TV is always disconnected. If I connected VGA, then start Xorg, the bug does not exist. If I ignored VGA in xorg.conf, the bug also does not exist.