Comment 88 for bug 1492764

[ 1.775356] ------------[ cut here ]------------
[ 1.775379] WARNING: CPU: 2 PID: 213 at /build/linux-NgsOGa/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12328 check_crtc_state+0x2c5/0x440 [i915]()
[ 1.775380] pipe state doesn't match!
[ 1.775382] Modules linked in: uas usb_storage crct10dif_pclmul crc32_pclmul i915 aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit psmouse drm
_kms_helper ahci r8169 libahci drm mii sdhci_acpi sdhci video i2c_hid hid
[ 1.775404] CPU: 2 PID: 213 Comm: plymouthd Not tainted 4.2.0-27-generic #32-Ubuntu
[ 1.775405] Hardware name: ZOTAC ZBOXNANO-CI520NANO/CI540NANO/ZBOXNANO-CI520NANO/CI540NANO, BIOS B213P104 09/11/2014
[ 1.775407] 0000000000000000 0000000089eb9c63 ffff88021161f7c8 ffffffff817eae99
[ 1.775411] 0000000000000000 ffff88021161f820 ffff88021161f808 ffffffff8107b9c6
[ 1.775414] ffff88021161f848 ffff88021161f8b0 ffff880211ed4000 0000000000000001
[ 1.775417] Call Trace:
[ 1.775424] [<ffffffff817eae99>] dump_stack+0x45/0x57
[ 1.775430] [<ffffffff8107b9c6>] warn_slowpath_common+0x86/0xc0
[ 1.775433] [<ffffffff8107ba55>] warn_slowpath_fmt+0x55/0x70
[ 1.775453] [<ffffffffc024d9e1>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
[ 1.775470] [<ffffffffc024ddd5>] check_crtc_state+0x2c5/0x440 [i915]
[ 1.775493] [<ffffffffc0261bfd>] intel_modeset_check_state+0x21d/0x6d0 [i915]
[ 1.775511] [<ffffffffc0262db7>] intel_crtc_set_config+0x4c7/0x580 [i915]
[ 1.775531] [<ffffffffc007bef5>] ? drm_mode_create+0x25/0x60 [drm]
[ 1.775546] [<ffffffffc00754a6>] drm_mode_set_config_internal+0x66/0x100 [drm]
[ 1.775560] [<ffffffffc0079b39>] drm_mode_setcrtc+0x3e9/0x500 [drm]
[ 1.775570] [<ffffffffc006a495>] drm_ioctl+0x125/0x610 [drm]
[ 1.775582] [<ffffffffc0079750>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[ 1.775587] [<ffffffff812110b5>] do_vfs_ioctl+0x295/0x480
[ 1.775591] [<ffffffff81211319>] SyS_ioctl+0x79/0x90
[ 1.775594] [<ffffffff817f1c72>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 1.775596] ---[ end trace 7ddf26038ba6c902 ]---
[ 1.778809] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
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