Comment 42 for bug 1542939

Additional info:
reporter: libreport-2.6.4
WARNING: CPU: 0 PID: 83 at drivers/gpu/drm/drm_irq.c:1268 drm_wait_one_vblank+0x191/0x1a0 [drm]()
vblank wait timed out on crtc 0
Modules linked in: i915(+) i2c_algo_bit dm9601 drm_kms_helper usbnet mii syscopyarea sysfillrect sysimgblt e1000e fb_sys_fops drm uas serio_raw ata_generic usb_storage pata_acpi ptp pps_core video fjes
CPU: 0 PID: 83 Comm: kworker/u4:5 Not tainted 4.4.2-301.fc23.i686 #1
Hardware name: Hewlett-Packard HP Compaq 6720s/30D8, BIOS 68MDU Ver. F.01 07/05/2007
Workqueue: events_unbound async_run_entry_fn
 c0d8a967 d871a81f 00000000 f691bb94 c07264a0 f691bbd4 f691bbc4 c0460107
 f7eb0df0 f691bbf4 00000053 f7eaeaae 000004f4 f7e88551 f7e88551 f64b4400
 00000000 00000000 f691bbe0 c046017e 00000009 f691bbd4 f7eb0df0 f691bbf4
Call Trace:
 [<c07264a0>] dump_stack+0x41/0x61
 [<c0460107>] warn_slowpath_common+0x87/0xc0
 [<f7e88551>] ? drm_wait_one_vblank+0x191/0x1a0 [drm]
 [<f7e88551>] ? drm_wait_one_vblank+0x191/0x1a0 [drm]
 [<c046017e>] warn_slowpath_fmt+0x3e/0x60
 [<f7e88551>] drm_wait_one_vblank+0x191/0x1a0 [drm]
 [<c049e330>] ? wake_atomic_t_function+0x70/0x70
 [<f8099ae7>] intel_get_load_detect_pipe+0x5d7/0x5f0 [i915]
 [<f80d4036>] intel_tv_detect+0x106/0x660 [i915]
 [<c0490208>] ? check_preempt_wakeup+0xe8/0x220
 [<f7de3c7b>] drm_helper_probe_single_connector_modes_merge_bits+0x20b/0x480 [drm_kms_helper]
 [<f7de3f07>] drm_helper_probe_single_connector_modes+0x17/0x20 [drm_kms_helper]
 [<f7def73a>] drm_fb_helper_initial_config+0x9a/0x400 [drm_kms_helper]
 [<c0498829>] ? pick_next_task_fair+0x459/0x520
 [<f80aab19>] intel_fbdev_initial_config+0x19/0x20 [i915]
 [<c047d78e>] async_run_entry_fn+0x4e/0x170
 [<c0475bc5>] process_one_work+0x145/0x380
 [<c0475e39>] worker_thread+0x39/0x430
 [<c0475e00>] ? process_one_work+0x380/0x380
 [<c047b0d6>] kthread+0xa6/0xc0
 [<c0ada7c9>] ret_from_kernel_thread+0x21/0x38
 [<c047b030>] ? kthread_worker_fn+0x130/0x130