Probably a follow-on to bug 65673.

[    1.201022] WARNING: at drivers/gpu/drm/i915/intel_display.c:3023 intel_put_shared_dpll+0x9f/0xd0()
[    1.201023] bad PCH DPLL A refcount
[    1.201024] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W    3.10.0-rc5+ #482
[    1.201025] Hardware name: Intel Corporation 2012 Client Platform/Emerald Lake 2, BIOS ACRVMBY1.86C.0078.P00.1201161002 01/16/2012
[    1.201026]  0000000000000009 ffff8802560bd4c0 ffffffff814a3406 ffff8802560bd4f8
[    1.201027]  ffffffff8103941b ffff8802558c6000 ffff88025550e748 ffff88025550c000
[    1.201028]  0000000000000001 0000000000000000 ffff8802560bd558 ffffffff810394bc
[    1.201028] Call Trace:
[    1.201030]  [<ffffffff814a3406>] dump_stack+0x19/0x1b
[    1.201038]  [<ffffffff81314eed>] __intel_set_mode+0x2bd/0x1290
[    1.201039]  [<ffffffff8123081a>] ? string.isra.3+0x3a/0xd0
[    1.201041]  [<ffffffff8123081a>] ? string.isra.3+0x3a/0xd0
[    1.201042]  [<ffffffff81231641>] ? vsnprintf+0x461/0x640
[    1.201043]  [<ffffffff813185f6>] intel_set_mode+0x16/0x30
[    1.201045]  [<ffffffff81318dc2>] intel_crtc_set_config+0x7b2/0x970
[    1.201046]  [<ffffffff812d58be>] drm_mode_set_config_internal+0x2e/0x60
[    1.201048]  [<ffffffff812c1541>] drm_fb_helper_set_par+0x71/0xf0
[    1.201049]  [<ffffffff81260fa4>] fbcon_init+0x514/0x590
[    1.201051]  [<ffffffff812ae8ac>] visual_init+0x8c/0xe0
[    1.201053]  [<ffffffff812b0a05>] do_bind_con_driver+0x115/0x2a0
[    1.201055]  [<ffffffff812b1dd1>] do_take_over_console+0x61/0x70
[    1.201056]  [<ffffffff8125f493>] do_fbcon_takeover+0x63/0xc0
[    1.201057]  [<ffffffff81263015>] fbcon_event_notify+0x705/0x810
[    1.201059]  [<ffffffff81061bed>] notifier_call_chain+0x4d/0x70
[    1.201060]  [<ffffffff81061f88>] __blocking_notifier_call_chain+0x58/0x80
[    1.201061]  [<ffffffff81061fc6>] blocking_notifier_call_chain+0x16/0x20
[    1.201063]  [<ffffffff812572db>] fb_notifier_call_chain+0x1b/0x20
[    1.201064]  [<ffffffff81259356>] register_framebuffer+0x1d6/0x310
[    1.201066]  [<ffffffff812c1211>] drm_fb_helper_initial_config+0x371/0x540
[    1.201068]  [<ffffffff81339ac1>] intel_fbdev_initial_config+0x21/0x30
[    1.201069]  [<ffffffff812e770e>] i915_driver_load+0xe3e/0xe70
[    1.201071]  [<ffffffff812d08e6>] drm_get_pci_dev+0x176/0x2a0
[    1.201072]  [<ffffffff812e29ac>] i915_pci_probe+0x2c/0x70
[    1.201074]  [<ffffffff812496ac>] pci_device_probe+0x9c/0xe0
[    1.201075]  [<ffffffff81350f77>] driver_probe_device+0x77/0x240
[    1.201077]  [<ffffffff813511eb>] __driver_attach+0xab/0xb0
[    1.201078]  [<ffffffff81351140>] ? driver_probe_device+0x240/0x240
[    1.201079]  [<ffffffff8134f29d>] bus_for_each_dev+0x5d/0xa0
[    1.201081]  [<ffffffff81350c9e>] driver_attach+0x1e/0x20
[    1.201082]  [<ffffffff8134fb7e>] bus_add_driver+0xfe/0x240
[    1.201083]  [<ffffffff818bb276>] ? ftrace_define_fields_drm_vblank_event+0x69/0x69
[    1.201084]  [<ffffffff81351867>] driver_register+0x77/0x170
[    1.201085]  [<ffffffff818bb276>] ? ftrace_define_fields_drm_vblank_event+0x69/0x69
[    1.201087]  [<ffffffff8124941c>] __pci_register_driver+0x4c/0x50
[    1.201088]  [<ffffffff812d0b25>] drm_pci_init+0x115/0x130
[    1.201089]  [<ffffffff818bb276>] ? ftrace_define_fields_drm_vblank_event+0x69/0x69
[    1.201090]  [<ffffffff818bb2dc>] i915_init+0x66/0x68
[    1.201092]  [<ffffffff8188edb2>] do_one_initcall+0x7b/0x10f
[    1.201094]  [<ffffffff8188ef7a>] kernel_init_freeable+0x134/0x1c1
[    1.201096]  [<ffffffff8188e80b>] ? do_early_param+0x8a/0x8a
[    1.201097]  [<ffffffff814943a0>] ? rest_init+0x80/0x80
[    1.201098]  [<ffffffff814943ae>] kernel_init+0xe/0xf0
[    1.201099]  [<ffffffff814a866c>] ret_from_fork+0x7c/0xb0
[    1.201101]  [<ffffffff814943a0>] ? rest_init+0x80/0x80
[    1.201101] ---[ end trace 2d08f775911e9ce2 ]---