Description of problem:
Lock screen and wait for the screensaver program start. And I find the screensaver program crash after re-login.

Version-Release number of selected component:
kdeartwork-screensavers-4.9.97-1.fc19

Additional info:
backtrace_rating: 4
cmdline:        keuphoria.kss -window-id 104857652
crash_function: crashHandler
executable:     /usr/bin/keuphoria.kss
kernel:         3.7.0-6.fc19.x86_64
remote_result:  NOTFOUND
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #2 crashHandler at /usr/src/debug/kde-workspace-4.9.97/kscreensaver/libkscreensaver/main.cpp:53
 #4 brw_update_renderbuffer_surface at brw_wm_surface_state.c:1109
 #5 brw_update_renderbuffer_surfaces at brw_wm_surface_state.c:1205
 #6 brw_upload_state at brw_state_upload.c:498
 #7 brw_try_draw_prims at brw_draw.c:493
 #8 brw_draw_prims at brw_draw.c:589
 #9 vbo_exec_vtx_flush at ../../../src/mesa/vbo/vbo_exec_draw.c:408
 #10 vbo_exec_FlushVertices_internal at ../../../src/mesa/vbo/vbo_exec_api.c:551
 #11 vbo_exec_FlushVertices at ../../../src/mesa/vbo/vbo_exec_api.c:1322
 #12 _mesa_PopMatrix at ../../../src/mesa/main/matrix.c:285