Description of problem: It occurred when I log in. Additional info: libreport version: 2.0.14 abrt_version: 2.0.13 cmdline: BOOT_IMAGE=/boot/vmlinuz-3.6.2-4.fc17.i686 root=UUID=e489f3fb-20a3-45a6-a2f9-0a8f60c10148 ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16 rd.luks=0 KEYTABLE=es LANG=en_US.UTF-8 rhgb quiet acpi_osi=Linux kernel: 3.6.2-4.fc17.i686 kernel_tainted_long: :Proprietary module has not been loaded. :Taint on warning. :Modules from drivers/staging are loaded. backtrace: :WARNING: at drivers/gpu/drm/i915/intel_display.c:1240 assert_plane+0x7f/0x90 [i915]() :Hardware name: Satellite L515 :plane B assertion failure (expected off, current on) :Modules linked in: bnep lockd sunrpc bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ip6table_filter ip6_tables fuse uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev arc4 media rtl8187 eeprom_93cx6 mac80211 cfg80211 rfkill snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_page_alloc snd_timer r8169 snd iTCO_wdt mii soundcore i2c_i801 coretemp iTCO_vendor_support lpc_ich microcode uinput i915 video i2c_algo_bit drm_kms_helper drm i2c_core :Pid: 5492, comm: kworker/0:0 Tainted: G WC O 3.6.2-4.fc17.i686 #1 :Call Trace: : [<c043c562>] warn_slowpath_common+0x72/0xa0 : [<f809fe3f>] ? assert_plane+0x7f/0x90 [i915] : [<f809fe3f>] ? assert_plane+0x7f/0x90 [i915] : [<c043c633>] warn_slowpath_fmt+0x33/0x40 : [<f809fe3f>] assert_plane+0x7f/0x90 [i915] : [<f80a8bb6>] intel_crtc_disable+0x46/0x90 [i915] : [<f7c732af>] drm_helper_disable_unused_functions+0xef/0x140 [drm_kms_helper] : [<f7c73ca8>] drm_helper_resume_force_mode+0x108/0x140 [drm_kms_helper] : [<f80acdb5>] intel_lid_notify+0x95/0xb0 [i915] : [<c09577b3>] notifier_call_chain+0x43/0x60 : [<c0461ed1>] __blocking_notifier_call_chain+0x41/0x80 : [<c0461f2f>] blocking_notifier_call_chain+0x1f/0x30 : [<c06e3bfc>] acpi_lid_send_state+0x78/0xa4 : [<c06e4012>] acpi_button_notify+0x37/0xa1 : [<c06c27aa>] acpi_device_notify+0x16/0x18 : [<c06cde6b>] acpi_ev_notify_dispatch+0x33/0x4a : [<c06bfd0c>] acpi_os_execute_deferred+0x20/0x2b : [<c0455870>] process_one_work+0x120/0x3e0 : [<c04549c0>] ? wake_up_worker+0x30/0x30 : [<c06bfcec>] ? acpi_os_wait_events_complete+0x1e/0x1e : [<c04571c1>] worker_thread+0x111/0x3b0 : [<c046760e>] ? complete+0x4e/0x60 : [<c04570b0>] ? manage_workers+0x2a0/0x2a0 : [<c045bba2>] kthread+0x72/0x80 : [<c045bb30>] ? kthread_freezable_should_stop+0x60/0x60 : [<c095b3be>] kernel_thread_helper+0x6/0x10
I plugged in an LCD monitor (ASUS PB238) on my laptop, then used the Fn-based keystroke to switch graphic outputs, and multiple errors like this appeared. The operation was successful in the end, though. Package: kernel Architecture: x86_64 OS Release: Fedora release 16 (Verne)
*** This bug has been marked as a duplicate of bug 838791 ***