[Bug 69875] [i915] kernel 3.11.2 intel_pipe_config_compare ERROR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69875

--- Comment #5 from John <da_audiophile at yahoo.com> ---
I can confirm the bug on my i7-3770k (onboard HD 4000).  If I revert the commit
that Carsten linked in comment #4, I get no such error in dmesg.

Section of dmsg under 3.11.2 without revert:
[    0.738132] fbcon: inteldrmfb (fb0) is primary device
[    0.939391] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP,
aborting
[    1.022675] [drm:intel_pipe_config_compare] *ERROR* mismatch in
pch_pfit.size (expected 0, found 167773600)
[    1.022675] ------------[ cut here ]------------
[    1.022686] WARNING: CPU: 0 PID: 78 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x59f/0x9d0 [i915]()
[    1.022687] pipe state doesn't match!
[    1.022689] Modules linked in: i915(+) video button i2c_algo_bit intel_agp
intel_gtt drm_kms_helper drm i2c_core
[    1.022690] CPU: 0 PID: 78 Comm: modprobe Not tainted 3.11.2-1-custom #1
[    1.022691] Hardware name: System manufacturer System Product Name/P8Z77-V
PRO, BIOS 2104 08/13/2013
[    1.022693]  0000000000000009 ffff880408647180 ffffffff8147721d
ffff8804086471c8
[    1.022694]  ffff8804086471b8 ffffffff81048efd ffff880409a1b6d8
ffff8804085d6800
[    1.022695]  0000000000000001 ffff8804085d6ca0 ffff880409a1b000
ffff880408647218
[    1.022696] Call Trace:
[    1.022699]  [<ffffffff8147721d>] dump_stack+0x54/0x8d
[    1.022701]  [<ffffffff81048efd>] warn_slowpath_common+0x7d/0xa0
[    1.022702]  [<ffffffff81048f6c>] warn_slowpath_fmt+0x4c/0x50
[    1.022711]  [<ffffffffa00be91f>] check_crtc_state+0x59f/0x9d0 [i915]
[    1.022720]  [<ffffffffa00c91e3>] intel_modeset_check_state+0x2c3/0x770
[i915]
[    1.022727]  [<ffffffffa00c9725>] intel_set_mode+0x25/0x30 [i915]
[    1.022733]  [<ffffffffa00c9f92>] intel_crtc_set_config+0x762/0x920 [i915]
[    1.022737]  [<ffffffffa001dc5d>] drm_mode_set_config_internal+0x5d/0xe0
[drm]
[    1.022739]  [<ffffffffa0064681>] drm_fb_helper_set_par+0x71/0xf0
[drm_kms_helper]
[    1.022741]  [<ffffffff812bd2b4>] fbcon_init+0x504/0x580
[    1.022743]  [<ffffffff813180fc>] visual_init+0xbc/0x120
[    1.022744]  [<ffffffff8131a6a3>] do_bind_con_driver+0x163/0x380
[    1.022745]  [<ffffffff8131aea4>] do_take_over_console+0x114/0x1c0
[    1.022747]  [<ffffffff812bd393>] do_fbcon_takeover+0x63/0xd0
[    1.022748]  [<ffffffff812c1ae5>] fbcon_event_notify+0x605/0x720
[    1.022750]  [<ffffffff8148164c>] notifier_call_chain+0x4c/0x70
[    1.022751]  [<ffffffff8106fe3d>] __blocking_notifier_call_chain+0x4d/0x70
[    1.022752]  [<ffffffff8106fe76>] blocking_notifier_call_chain+0x16/0x20
[    1.022754]  [<ffffffff812b190b>] fb_notifier_call_chain+0x1b/0x20
[    1.022755]  [<ffffffff812b38dd>] register_framebuffer+0x1dd/0x310
[    1.022757]  [<ffffffffa006442f>] drm_fb_helper_initial_config+0x32f/0x510
[drm_kms_helper]
[    1.022760]  [<ffffffffa001c75f>] ? drm_mode_config_reset+0xcf/0xf0 [drm]
[    1.022762]  [<ffffffff8115dfc5>] ? kmem_cache_alloc_trace+0x225/0x270
[    1.022763]  [<ffffffffa00628a9>] ? drm_fb_helper_init+0x179/0x210
[drm_kms_helper]
[    1.022773]  [<ffffffffa00ea551>] intel_fbdev_initial_config+0x21/0x30
[i915]
[    1.022781]  [<ffffffffa0099351>] i915_driver_load+0xdc1/0xdf0 [i915]
[    1.022785]  [<ffffffffa0019486>] drm_get_pci_dev+0x166/0x280 [drm]
[    1.022792]  [<ffffffffa009471c>] i915_pci_probe+0x2c/0x70 [i915]
[    1.022794]  [<ffffffff81289d7e>] local_pci_probe+0x3e/0x70
[    1.022796]  [<ffffffff81289f71>] pci_device_probe+0x111/0x120
[    1.022798]  [<ffffffff8133b927>] driver_probe_device+0x87/0x3a0
[    1.022799]  [<ffffffff8133bd13>] __driver_attach+0x93/0xa0
[    1.022800]  [<ffffffff8133bc80>] ? __device_attach+0x40/0x40
[    1.022802]  [<ffffffff81339843>] bus_for_each_dev+0x63/0xa0
[    1.022803]  [<ffffffff8133b37e>] driver_attach+0x1e/0x20
[    1.022804]  [<ffffffff8133af18>] bus_add_driver+0x1e8/0x2a0
[    1.022805]  [<ffffffffa012a000>] ? 0xffffffffa0129fff
[    1.022806]  [<ffffffff8133c384>] driver_register+0x74/0x150
[    1.022807]  [<ffffffffa012a000>] ? 0xffffffffa0129fff
[    1.022808]  [<ffffffff81289bfd>] __pci_register_driver+0x4d/0x50
[    1.022811]  [<ffffffffa00196ba>] drm_pci_init+0x11a/0x130 [drm]
[    1.022812]  [<ffffffff8147ac8e>] ? mutex_unlock+0xe/0x10
[    1.022813]  [<ffffffffa012a000>] ? 0xffffffffa0129fff
[    1.022820]  [<ffffffffa012a066>] i915_init+0x66/0x68 [i915]
[    1.022821]  [<ffffffff810002c2>] do_one_initcall+0xf2/0x1a0
[    1.022822]  [<ffffffff8106fe48>] ? __blocking_notifier_call_chain+0x58/0x70
[    1.022824]  [<ffffffff810aa4c7>] load_module+0x1b17/0x25b0
[    1.022825]  [<ffffffff810a6f10>] ? store_uevent+0x40/0x40
[    1.022827]  [<ffffffff810ab0d6>] SyS_finit_module+0x86/0xb0
[    1.022829]  [<ffffffff81485546>] system_call_fastpath+0x1a/0x1f
[    1.022829] ---[ end trace 90f11c6df3f24fdf ]---

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