Created attachment 114660 [details]
Xorg log

==System Environment==
--------------------------
Regression: Yes, bisect later

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-testing:drm-intel-testing-2015-03-13

X11: X11R7_64_2015Q1

==Bug detailed description==
-----------------------------
root@x-bsw14:~# glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
311 frames in 5.0 seconds = 62.126 FPS
300 frames in 5.0 seconds = 59.997 FPS
300 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 60.002 FPS
282 frames in 5.0 seconds = 56.397 FPS
301 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 60.007 FPS
300 frames in 5.0 seconds = 59.990 FPS
301 frames in 5.0 seconds = 60.004 FPS
300 frames in 5.0 seconds = 59.990 FPS
301 frames in 5.0 seconds = 60.011 FPS
300 frames in 5.0 seconds = 59.982 FPS
301 frames in 5.0 seconds = 60.010 FPS
301 frames in 5.0 seconds = 60.010 FPS
Window manager warning: Log level 6: The program 'gnome-shell' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadLength (poly request too large or internal Xlib length erro'.
  (Details: serial 46639 error_code 16 request_code 131 (XInputExtension) minor_code 53)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
236 frames in 5.0 seconds = 47.193 FPS
301 frames in 5.0 seconds = 59.996 FPS
300 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 60.000 FPS
302 frames in 5.0 seconds = 60.203 FPS
300 frames in 5.0 seconds = 59.996 FPS
^C[2]+  Trace/breakpoint trap   (core dumped) gnome-shell

Then the gnome shell's taskbar will disapear.


==Reproduce steps==
---------------------------- 
1)Xinit &
2)Gnome-shell &
3)Glxgears
4)click frequently on the screen.
5)Ctrl + c