modprobe i915:
WARNING: Error inserting drm (/lib/modules/2.6.23-std-smp-alt1/kernel/drivers/char/drm/drm.ko): Invalid module format
FATAL: Error inserting i915 (/lib/modules/2.6.23-std-smp-alt1/kernel/drivers/char/drm/i915.ko): Unknown symbol in module, or unknown parameter (see dmesg)

dmesg:
<cut>
i915: Unknown symbol drm_open
i915: Unknown symbol drm_fasync
i915: Unknown symbol drm_fence_handler
i915: Unknown symbol drm_poll
i915: Unknown symbol drm_core_get_reg_ofs
i915: Unknown symbol drm_mm_put_block
i915: Unknown symbol drm_bo_mem_space
i915: Unknown symbol drm_bo_move_ttm
i915: Unknown symbol drm_calloc
i915: Unknown symbol drm_agp_init_ttm
i915: Unknown symbol drm_pci_alloc
i915: Unknown symbol drm_irq_uninstall
i915: Unknown symbol drm_get_dev
i915: Unknown symbol drm_ioctl
i915: Unknown symbol drm_bo_driver_init
i915: Unknown symbol drm_exit
i915: Unknown symbol drm_getsarea
i915: Unknown symbol drm_debug
i915: Unknown symbol drm_core_ioremapfree
i915: Unknown symbol drm_core_get_map_ofs
i915: Unknown symbol drm_get_drawable_info
i915: Unknown symbol drm_init
i915: Unknown symbol drm_fence_flush_old
i915: Unknown symbol drm_locked_tasklet
i915: Unknown symbol drm_vbl_send_signals
i915: Unknown symbol drm_cleanup_pci
i915: Unknown symbol drm_pci_free
i915: Unknown symbol drm_core_ioremap
i915: Unknown symbol drm_bo_move_accel_cleanup
i915: Unknown symbol drm_mmap
i915: Unknown symbol drm_bind_ttm
i915: Unknown symbol drm_bo_move_memcpy
i915: Unknown symbol drm_core_reclaim_buffers
i915: Unknown symbol drm_release