BUG: warning at drivers/char/vt.c:3287/do_blank_screen()
 [<c02cbee4>] do_blank_screen+0x42/0x1f6
 [<c02dbfdc>] fbcon_event_notify+0x892/0x9ad
 [<c02dea51>] soft_cursor+0x155/0x164
 [<c02de81e>] bit_cursor+0x50c/0x522
 [<c0101cf5>] __switch_to+0x13e/0x19d
 [<c04602a9>] schedule+0x36b/0x411
 [<c012497f>] notifier_call_chain+0x15/0x30
 [<c0124dc0>] blocking_notifier_call_chain+0x1c/0x2b
 [<c02d2be6>] fb_notifier_call_chain+0x12/0x16
 [<c02d2fe8>] fb_blank+0x4f/0x58
 [<c02da6ec>] fbcon_blank+0x104/0x17a
 [<c02d9c24>] fbcon_cursor+0x214/0x24b
 [<c02de312>] bit_cursor+0x0/0x522
 [<c02cc037>] do_blank_screen+0x195/0x1f6
 [<c02ce86e>] console_callback+0xb1/0xc2
 [<c0127093>] run_workqueue+0x89/0xde
 [<c02ce7bd>] console_callback+0x0/0xc2
 [<c0127618>] worker_thread+0xf2/0x122
 [<c0117235>] default_wake_function+0x0/0x15
 [<c0127526>] worker_thread+0x0/0x122
 [<c01295bd>] kthread+0xb1/0xe0
 [<c012950c>] kthread+0x0/0xe0
 [<c0101005>] kernel_thread_helper+0x5/0xb
BUG: warning at drivers/char/vt.c:3351/do_unblank_screen()
 [<c02cc5d3>] do_unblank_screen+0x36/0xf1
 [<c02dbfe5>] fbcon_event_notify+0x89b/0x9ad
 [<c01513dc>] __remove_vm_area+0x22/0x34
 [<c02dea51>] soft_cursor+0x155/0x164
 [<c02de81e>] bit_cursor+0x50c/0x522
 [<c0101d4d>] __switch_to+0x196/0x19d
 [<c0101d4d>] __switch_to+0x196/0x19d
 [<c0460332>] schedule+0x3f4/0x411
 [<c012497f>] notifier_call_chain+0x15/0x30
 [<c0124dc0>] blocking_notifier_call_chain+0x1c/0x2b
 [<c02d2be6>] fb_notifier_call_chain+0x12/0x16
 [<c02d2fe8>] fb_blank+0x4f/0x58
 [<c02da6ec>] fbcon_blank+0x104/0x17a
 [<c02cc64e>] do_unblank_screen+0xb1/0xf1
 [<c02c6078>] complete_change_console+0x3c/0xaa
 [<c02c7020>] vt_ioctl+0xe39/0x13fd
 [<c0167f94>] link_path_walk+0xb0/0xbb
 [<c02c2cf4>] tty_ioctl+0xbb9/0xc45
 [<c01682cf>] do_path_lookup+0x1f3/0x20e
 [<c0166e3a>] vfs_permission+0x13/0x17
 [<c0166e9c>] may_open+0x5e/0x196
 [<c03b9ff1>] pci_mmcfg_read+0xc4/0x123
 [<c03bb555>] pci_write+0x23/0x27
 [<c02b7482>] pci_user_write_config_word+0x4a/0x6e
 [<c0169dd8>] do_ioctl+0x48/0x5f
 [<c016a02e>] vfs_ioctl+0x23f/0x251
 [<c016a06d>] sys_ioctl+0x2d/0x48
 [<c0102c0d>] sysenter_past_esp+0x56/0x79