get black screen about 10 sec before desktop

[luigi]

hi. i get black screen when boot about 10-15 seconds with movable cursor before desktop come.

its seems harmless but make to retard to meet desktop.its only interesting things that i see into Xorg.log that:  

[     5.536] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0 /dev/dri/card0
[     5.536] xf86: remove device 0 /sys/devices/pci0000:00/0000:00:02.0/drm/card0
[     5.536] failed to find screen to remove
[     5.536] (II) config/udev: Adding drm device (/dev/dri/card0)
[     5.536] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1 (null)
[     5.536] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-VGA-1 (null)

....snipped

[     5.572] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-1 (null)
[     5.573] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-DP-1 (null)
[     5.819] (II) intel(0): EDID vendor "AUO", prod id 12348
[     5.819] (II) intel(0): Printing DDC gathered Modelines:
[     5.819] (II) intel(0): Modeline "1366x768"x0.0   69.30  1366 1404 1426 1436  768 771 777 803 -hsync -vsync (48.3 kHz eP)

...snipped

mesa:10.2.1       intel:2.99.912      xorg:1.15.1       system:archlinux-64          device:8086:0166 (ivybridge GT2 mobil)

is it make sense or driver related?  Should i open a bug report? sorry for noise.