如何旋转屏幕？

supernatural

intel 855GM的显卡 debian sid ，LCD

我想让屏幕旋转90度，在xorg.conf中加入"Option 'Rotate' '90'"后X就起不来了，这里是最后日志里出错的信息：

1. 
   
2. (II) I810(0): Activating tiled memory for the back buffer.
   
3. (II) I810(0): Activating tiled memory for the depth buffer.
   
4. (II) I810(0): [drm] Registers = 0xfaf80000
   
5. (II) I810(0): [drm] ring buffer = 0xf0000000
   
6. (II) I810(0): [drm] init sarea width,height = 1024 x 768 (pitch 1024)
   
7. (II) I810(0): [drm] Mapping front buffer
   
8. (EE) I810(0): [drm] drmAddMap(front_handle) failed. Disabling DRI
   
9. 
   
10.    *** If unresolved symbols were reported above, they might not
    
11.    *** be the reason for the server aborting.
    
12. 
    
13. Backtrace:
    
14. 0: /usr/bin/X11/X(xf86SigHandler+0x88) [0x80b8d98]
    
15. 1: [0xffffe420]
    
16. 2: /usr/lib/xorg/modules/drivers/i810_drv.so(I830DRIMapScreenRegions+0x25c) [0xb7a1ab5c]
    
17. 3: /usr/lib/xorg/modules/drivers/i810_drv.so(I830UpdateDRIBuffers+0x18e) [0xb7a1adee]
    
18. 4: /usr/lib/xorg/modules/drivers/i810_drv.so(I830DRIDoMappings+0x2e5) [0xb7a1b235]
    
19. 5: /usr/lib/xorg/modules/drivers/i810_drv.so [0xb7a06f6e]
    
20. 6: /usr/bin/X11/X(AddScreen+0x1df) [0x806e83f]
    
21. 7: /usr/bin/X11/X(InitOutput+0x470) [0x80a0f20]
    
22. 8: /usr/bin/X11/X(main+0x293) [0x806e133]
    
23. 9: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xd0) [0xb7ddfeb0]
    
24. 10: /usr/bin/X11/X(FontFileCompleteXLFD+0x91) [0x806d881]
    
25. 
    
26. Fatal server error:
    
27. Caught signal 11.  Server aborting
    
28. 
    

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