This is for the case when it goes wrong. The diff to the previous file probably reveals something about what goes wrong:
$ diff Xorg.0.log.old.2001FP Xorg.0.log.2001FP
23c23
< (==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep 22 14:08:17 2008
---
> (==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep 22 14:08:41 2008
413a414,415
> (II) intel(0): I2C device "CRTDDC_A:ddc2" registered at address 0xA0.
> (II) intel(0): I2C device "CRTDDC_A:ddc2" removed.
418c420
< (II) intel(0): Output VGA disconnected
---
> (II) intel(0): Output VGA connected
419a422
> (II) intel(0): Output VGA using initial mode 1280x800
491,493c494
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: Open failed
---
> drmOpenDevice: open result is 8, (OK)
495,497c496
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: Open failed
---
> drmOpenDevice: open result is 8, (OK)
503d501
< (II) [drm] loaded kernel module for "i915" driver.
563,566c561,564
< (II) intel(0): Pipe B is off
< (II) intel(0): Display plane B is now disabled and connected to pipe B.
< (II) intel(0): Output VGA is connected to pipe none
< (II) intel(0): Output TMDS-1 is connected to pipe A
---
> (II) intel(0): Pipe B is on
> (II) intel(0): Display plane B is now enabled and connected to pipe B.
> (II) intel(0): Output VGA is connected to pipe A
> (II) intel(0): Output TMDS-1 is connected to pipe B
662a661
> (II) AIGLX: Suspending AIGLX clients for VT switch
669,671d667
< (II) intel(0): [drm] removed 1 reserved context for kernel
< (II) intel(0): [drm] unmapping 8192 bytes of SAREA 0xf8cd2000 at 0xb7a54000
< (II) intel(0): [drm] Closed DRM master.
This is for the case when it goes wrong. The diff to the previous file probably reveals something about what goes wrong:
$ diff Xorg.0. log.old. 2001FP Xorg.0.log.2001FP Xorg.0. log", Time: Mon Sep 22 14:08:17 2008 Xorg.0. log", Time: Mon Sep 22 14:08:41 2008
23c23
< (==) Log file: "/var/log/
---
> (==) Log file: "/var/log/
413a414,415
> (II) intel(0): I2C device "CRTDDC_A:ddc2" registered at address 0xA0.
> (II) intel(0): I2C device "CRTDDC_A:ddc2" removed.
418c420
< (II) intel(0): Output VGA disconnected
---
> (II) intel(0): Output VGA connected
419a422
> (II) intel(0): Output VGA using initial mode 1280x800
491,493c494
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: Open failed
---
> drmOpenDevice: open result is 8, (OK)
495,497c496
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: open result is -1, (No such device or address)
< drmOpenDevice: Open failed
---
> drmOpenDevice: open result is 8, (OK)
503d501
< (II) [drm] loaded kernel module for "i915" driver.
563,566c561,564
< (II) intel(0): Pipe B is off
< (II) intel(0): Display plane B is now disabled and connected to pipe B.
< (II) intel(0): Output VGA is connected to pipe none
< (II) intel(0): Output TMDS-1 is connected to pipe A
---
> (II) intel(0): Pipe B is on
> (II) intel(0): Display plane B is now enabled and connected to pipe B.
> (II) intel(0): Output VGA is connected to pipe A
> (II) intel(0): Output TMDS-1 is connected to pipe B
662a661
> (II) AIGLX: Suspending AIGLX clients for VT switch
669,671d667
< (II) intel(0): [drm] removed 1 reserved context for kernel
< (II) intel(0): [drm] unmapping 8192 bytes of SAREA 0xf8cd2000 at 0xb7a54000
< (II) intel(0): [drm] Closed DRM master.