Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 1 PID: 252 at drivers/gpu/drm/i915/intel_display.c:861 intel_wait_for_vblank+0x209/0x210 [i915]()
vblank wait timed out
Modules linked in: i915(+) i2c_algo_bit drm_kms_helper drm r8169 mii i2c_core video ums_realtek uas usb_storage
CPU: 1 PID: 252 Comm: systemd-udevd Not tainted 3.16.4-200.fc20.x86_64 #1
Hardware name: TOSHIBA Satellite Pro L300/Portable PC, BIOS 2.20 12/09/2009
 0000000000000000 00000000ec1a0975 ffff880036cbb5d0 ffffffff81707965
 ffff880036cbb618 ffff880036cbb608 ffffffff8108d0ad ffff880036450000
 0000000000070040 0000000000000005 00000000fffb7bd1 00000000000000aa
Call Trace:
 [<ffffffff81707965>] dump_stack+0x45/0x56
 [<ffffffff8108d0ad>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108d12c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa010838e>] ? gen4_read32+0x4e/0xc0 [i915]
 [<ffffffffa0117ba9>] intel_wait_for_vblank+0x209/0x210 [i915]
 [<ffffffffa014f0e5>] intel_tv_detect+0x245/0x5c0 [i915]
 [<ffffffffa00baac3>] drm_helper_probe_single_connector_modes_merge_bits+0x293/0x3a0 [drm_kms_helper]
 [<ffffffffa00babe3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
 [<ffffffffa00bc9a0>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
 [<ffffffffa00bdacd>] drm_fb_helper_initial_config+0x15d/0x4d0 [drm_kms_helper]
 [<ffffffffa0108232>] ? gen4_write32+0x52/0xb0 [i915]
 [<ffffffffa00f70dd>] ? i915_hpd_irq_setup+0xcd/0xe0 [i915]
 [<ffffffffa012f30f>] intel_fbdev_initial_config+0x1f/0x30 [i915]
 [<ffffffffa0152eca>] i915_driver_load+0xf7a/0x1000 [i915]
 [<ffffffff8170b013>] ? __schedule+0x2c3/0x730
 [<ffffffff8146e2d7>] ? get_device+0x17/0x30
 [<ffffffff81473da5>] ? klist_class_dev_get+0x15/0x20
 [<ffffffff816f9212>] ? klist_add_tail+0x32/0x40
 [<ffffffff8146fc59>] ? device_add+0x219/0x630
 [<ffffffffa00664a6>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
 [<ffffffffa006294d>] drm_dev_register+0xad/0x100 [drm]
 [<ffffffffa006551f>] drm_get_pci_dev+0x8f/0x1f0 [drm]
 [<ffffffffa00c84bb>] i915_pci_probe+0x3b/0x60 [i915]
 [<ffffffff813a0ca5>] local_pci_probe+0x45/0xa0
 [<ffffffff813a1fb9>] pci_device_probe+0xf9/0x150
 [<ffffffff81472f5d>] driver_probe_device+0x12d/0x3d0
 [<ffffffff814732d3>] __driver_attach+0x93/0xa0
 [<ffffffff81473240>] ? __device_attach+0x40/0x40
 [<ffffffff81470e03>] bus_for_each_dev+0x73/0xc0
 [<ffffffff8147295e>] driver_attach+0x1e/0x20
 [<ffffffff81472540>] bus_add_driver+0x180/0x250
 [<ffffffff81473ab4>] driver_register+0x64/0xf0
 [<ffffffff813a063c>] __pci_register_driver+0x4c/0x50
 [<ffffffffa006578a>] drm_pci_init+0x10a/0x140 [drm]
 [<ffffffffa01a6000>] ? 0xffffffffa01a5fff
 [<ffffffffa01a6089>] i915_init+0x89/0x90 [i915]
 [<ffffffff81002144>] do_one_initcall+0xd4/0x210
 [<ffffffff811d5a2f>] ? kfree+0xff/0x140
 [<ffffffff811bbfa2>] ? __vunmap+0xb2/0x100
 [<ffffffff8110937b>] load_module+0x1dab/0x2600
 [<ffffffff811050f0>] ? store_uevent+0x70/0x70
 [<ffffffff811f9900>] ? kernel_read+0x50/0x80
 [<ffffffff81109d86>] SyS_finit_module+0xa6/0xd0
 [<ffffffff8170efa9>] system_call_fastpath+0x16/0x1b