Description of problem:
Not sure what happened, no idea how to reproduce, I was merely browsing some web sites. Noticed some bad screen flickering 2 times, then screen went black and eventually ended up back at GDM login screen.

Version-Release number of selected component:
xorg-x11-server-Xorg-1.20.14-30.fc39

Additional info:
reporter:       libreport-2.17.11
type:           CCpp
reason:         Xorg killed by SIGSEGV
journald_cursor: s=0d8ccd8272ef4c55b8c90bbde0da02ad;i=8eafe;b=92aec70c6f774de09c3aec963b133480;m=288d24f3ae;t=610472cb4ec9f;x=d6b1a4002ebed49f
executable:     /usr/libexec/Xorg
cmdline:        /usr/libexec/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -nolisten tcp -background none -noreset -keeptty -novtswitch -verbose 3
cgroup:         0::/user.slice/user-1000.slice/session-2.scope
rootdir:        /
uid:            1000
kernel:         6.6.13-200.fc39.ppc64le
package:        xorg-x11-server-Xorg-1.20.14-30.fc39
runlevel:       N 5
backtrace_rating: 4
crash_function: evergreen_emit_constant_buffers
comment:        Not sure what happened, no idea how to reproduce, I was merely browsing some web sites. Noticed some bad screen flickering 2 times, then screen went black and eventually ended up back at GDM login screen.

Truncated backtrace:
Thread no. 1 (35 frames)
 #0 evergreen_emit_constant_buffers at ../src/gallium/drivers/r600/evergreen_state.c:2211
 #1 r600_emit_atom at ../src/gallium/drivers/r600/r600_pipe.h:646
 #2 r600_draw_vbo at ../src/gallium/drivers/r600/r600_state_common.c:2337
 #3 u_vbuf_draw_vbo at ../src/gallium/auxiliary/util/u_vbuf.c:1499
 #4 cso_draw_vbo at ../src/gallium/auxiliary/cso_cache/cso_context.h:262
 #5 st_draw_gallium at ../src/mesa/state_tracker/st_draw.c:146
 #6 _mesa_draw_arrays at ../src/mesa/main/draw.c:1199
 #7 glamor_poly_fill_rect_gl at ../../../glamor/glamor_rects.c:155
 #8 glamor_poly_fill_rect at ../../../glamor/glamor_rects.c:194
 #9 damagePolyFillRect at ../../miext/damage/damage.c:1224
 #10 radeon_pixmap_clear at radeon_bo_helper.c:349
 #11 RADEONLeaveVT_KMS at radeon_kms.c:2665
 #12 xf86XVLeaveVT at common/xf86xv.c:1226
 #13 glxDRILeaveVT at ../../../glx/glxdri2.c:815
 #20 evergreen_emit_constant_buffers at ../src/gallium/drivers/r600/evergreen_state.c:2211
 #21 r600_emit_atom at ../src/gallium/drivers/r600/r600_pipe.h:646
 #22 r600_draw_vbo at ../src/gallium/drivers/r600/r600_state_common.c:2337
 #23 u_vbuf_draw_vbo at ../src/gallium/auxiliary/util/u_vbuf.c:1499
 #24 cso_draw_vbo at ../src/gallium/auxiliary/cso_cache/cso_context.h:262
 #25 st_draw_gallium at ../src/mesa/state_tracker/st_draw.c:146
 #26 _mesa_draw_arrays at ../src/mesa/main/draw.c:1199
 #27 glamor_gldrawarrays_quads_using_indices at ../../../glamor/glamor.c:364
 #28 glamor_glDrawArrays_GL_QUADS at ../../../glamor/glamor_utils.h:790
 #29 glamor_flush_composite_rects at ../../../glamor/glamor_render.c:664
 #30 glamor_composite_with_shader at ../../../glamor/glamor_render.c:1287
 #31 glamor_composite_clipped_region at ../../../glamor/glamor_render.c:1570
 #32 glamor_composite at ../../../glamor/glamor_render.c:1709
 #33 damageComposite at ../../miext/damage/damage.c:513
 #34 CompositePicture at ../../render/picture.c:1547
 #35 glamor_trapezoids at ../../../glamor/glamor_trapezoid.c:146
 #36 CompositeTrapezoids at ../../render/picture.c:1576
 #37 ProcRenderTrapezoids at ../../render/render.c:746
 #38 ProcRenderDispatch at ../../render/render.c:1988
 #39 Dispatch at ../../dix/dispatch.c:478
 #40 dix_main at ../../dix/main.c:276