Additional info:
reporter:       libreport-2.2.0
WARNING: CPU: 1 PID: 121 at drivers/gpu/drm/i915/intel_display.c:1074 assert_pipe+0x82/0xe0 [i915]()
pipe A assertion failure (expected on, current off)
Modules linked in: i915(+) ata_generic usb_storage i2c_algo_bit drm_kms_helper pata_acpi drm i2c_core video
CPU: 1 PID: 121 Comm: systemd-udevd Not tainted 3.11.10-301.fc20.i686 #1
Hardware name: Hewlett-Packard HP Mini/361A, BIOS 361A0 Ver. F.15 08/21/2009
 00000000 00000000 f6519924 c09795ee f6519964 f6519954 c0447b0e f7ee6984
 f6519980 00000079 f7ee5814 00000432 f7ea20d2 f7ea20d2 f6614000 00000041
 00000000 f651996c c0447b63 00000009 f6519964 f7ee6984 f6519980 f65199a0
Call Trace:
 [<c09795ee>] dump_stack+0x41/0x52
 [<c0447b0e>] warn_slowpath_common+0x7e/0xa0
 [<f7ea20d2>] ? assert_pipe+0x82/0xe0 [i915]
 [<f7ea20d2>] ? assert_pipe+0x82/0xe0 [i915]
 [<c0447b63>] warn_slowpath_fmt+0x33/0x40
 [<f7ea20d2>] assert_pipe+0x82/0xe0 [i915]
 [<f7ea2426>] intel_enable_pll+0x16/0xd0 [i915]
 [<f7ea2967>] i9xx_crtc_enable+0x67/0x230 [i915]
 [<f7ea8814>] __intel_set_mode+0x674/0x11b0 [i915]
 [<f7eab213>] intel_set_mode+0x23/0x40 [i915]
 [<f7eac330>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
 [<f7eadd5c>] intel_modeset_setup_hw_state+0x9bc/0xa20 [i915]
 [<f7eadde0>] intel_modeset_gem_init+0x20/0x30 [i915]
 [<f7e7eaca>] i915_driver_load+0xa7a/0xce0 [i915]
 [<f7e7be00>] ? i915_switcheroo_set_state+0xa0/0xa0 [i915]
 [<f7d4f36e>] ? drm_get_minor+0x1be/0x240 [drm]
 [<f7d510c3>] drm_get_pci_dev+0x133/0x240 [drm]
 [<f7e7a69b>] i915_pci_probe+0x2b/0x60 [i915]
 [<c06ac10f>] pci_device_probe+0x6f/0xb0
 [<c0757e89>] driver_probe_device+0x79/0x360
 [<c06ac05e>] ? pci_match_device+0x9e/0xb0
 [<c0758221>] __driver_attach+0x71/0x80
 [<c07581b0>] ? __device_attach+0x40/0x40
 [<c07562c7>] bus_for_each_dev+0x47/0x80
 [<c075798e>] driver_attach+0x1e/0x20
 [<c07581b0>] ? __device_attach+0x40/0x40
 [<c07575c7>] bus_add_driver+0x1c7/0x280
 [<c06abd00>] ? pci_pm_suspend+0x120/0x120
 [<c06abd00>] ? pci_pm_suspend+0x120/0x120
 [<c07587da>] driver_register+0x6a/0x130
 [<c06ab012>] __pci_register_driver+0x32/0x40
 [<f7d512c5>] drm_pci_init+0xf5/0x100 [drm]
 [<f7d16000>] ? 0xf7d15fff
 [<f7d1605e>] i915_init+0x5e/0x60 [i915]
 [<c040042a>] do_one_initcall+0xca/0x190
 [<c043b90b>] ? change_page_attr_set_clr+0x28b/0x370
 [<f7d16000>] ? 0xf7d15fff
 [<c043be87>] ? set_memory_ro+0x37/0x40
 [<c0976e05>] ? set_section_ro_nx+0x54/0x59
 [<c04a4fba>] load_module+0x1c1a/0x2320
 [<c04a5825>] SyS_finit_module+0x75/0xc0
 [<c051a9db>] ? vm_mmap_pgoff+0x7b/0xa0
 [<c098690d>] sysenter_do_call+0x12/0x28