Additional info:
libreport version: 2.0.14
abrt_version:   2.0.13
cmdline:        BOOT_IMAGE=/vmlinuz-3.6.1-1.fc17.x86_64 root=UUID=89800556-13b7-43ca-abd0-2e721b99cefe ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=True KEYTABLE=pt-latin1 rd.luks=0 LANG=en_US.UTF-8 rhgb quiet
kernel:         3.6.1-1.fc17.x86_64

kernel_tainted_long:
:Proprietary module has not been loaded.
:Taint on warning.

backtrace:
:WARNING: at drivers/gpu/drm/i915/intel_display.c:1240 assert_plane+0x78/0x80 [i915]()
:Hardware name: Infoway w7430
:plane B assertion failure (expected off, current on)
:Modules linked in: usblp fuse lockd sunrpc rfcomm ip6t_REJECT bnep nf_conntrack_ipv6 nf_conntrack_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 xt_state nf_conntrack ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek btusb snd_hda_intel snd_hda_codec snd_hwdep coretemp bluetooth arc4 iTCO_wdt iTCO_vendor_support lpc_ich atl1c mei snd_seq mfd_core uvcvideo rtl8192se videobuf2_vmalloc rtlwifi videobuf2_memops videobuf2_core mac80211 videodev media kvm_intel cfg80211 snd_seq_device snd_pcm rfkill i2c_i801 snd_page_alloc snd_timer snd soundcore kvm intel_ips microcode uinput binfmt_misc crc32c_intel mxm_wmi wmi i915 video i2c_algo_bit drm_kms_helper drm i2c_core
:Pid: 23229, comm: kworker/3:1 Tainted: G        W    3.6.1-1.fc17.x86_64 #1
:Call Trace:
: [<ffffffff8105b84f>] warn_slowpath_common+0x7f/0xc0
: [<ffffffff8105b946>] warn_slowpath_fmt+0x46/0x50
: [<ffffffffa0090dd8>] assert_plane+0x78/0x80 [i915]
: [<ffffffffa009a754>] intel_crtc_disable+0x54/0xb0 [i915]
: [<ffffffffa0065825>] drm_helper_disable_unused_functions+0x115/0x170 [drm_kms_helper]
: [<ffffffffa006711a>] drm_crtc_helper_set_config+0x91a/0xb00 [drm_kms_helper]
: [<ffffffffa002209f>] ? drm_mode_object_get+0x6f/0xc0 [drm]
: [<ffffffffa0022743>] ? drm_mode_create+0x33/0x80 [drm]
: [<ffffffffa0064f12>] drm_fb_helper_set_par+0x82/0x100 [