[Bug 71906] [BDW] *ERROR* mismatch in ips_enabled (expected 1, found 0)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71906

--- Comment #10 from lu hua <huax.lu at intel.com> ---
kms_cursor_crc and kms_pipe_crc_basic also fail with this error.

run ./kms_cursor_crc --run-subtest cursor-black-invisible-offscreen  

output                                                                         
                IGT-Version: 1.5-g72fe2b6 (x86_64) (Linux:
3.13.0-rc4_drm-intel-nightly_5f7867_20131226+ x86_64)
Beginning cursor-black-invisible-offscreen on crtc 3, connector 10
....................................................
cursor-black-invisible-offscreen on crtc 3, connector 10: PASSED

Beginning cursor-black-invisible-offscreen on crtc 5, connector 10
....................................................
cursor-black-invisible-offscreen on crtc 5, connector 10: PASSED

Beginning cursor-black-invisible-offscreen on crtc 7, connector 10
....................................................
cursor-black-invisible-offscreen on crtc 7, connector 10: PASSED

Subtest cursor-black-invisible-offscreen: SUCCESS

dmesg:
[  802.005840] [drm:intel_pipe_config_compare] *ERROR* mismatch in ips_enabled
(expected 1, found 0)
[  802.005841] ------------[ cut here ]------------
[  802.005866] WARNING: CPU: 0 PID: 3817 at
drivers/gpu/drm/i915/intel_display.c:9498 check_crtc_state+0x7fd/0x844 [i915]()
[  802.005866] pipe state doesn't match!
[  802.005878] Modules linked in: dm_mod pcspkr lpc_ich i2c_i801 snd_hda_intel
mfd_core snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore
battery ac acpi_cpufreq joydev i915 video button drm_kms_helper drm
[  802.005883] CPU: 0 PID: 3817 Comm: kms_cursor_crc Tainted: G        W   
3.13.0-rc4_drm-intel-nightly_5f7867_20131226+ #10
[  802.005887]  0000000000000000 0000000000000009 ffffffff81711fd2
ffff88009de396b8
[  802.005890]  ffffffff8103312a ffff88009de396b0 ffffffffa007fc96
0000000000000018
[  802.005892]  ffff880149f66000 ffff880145b08000 ffff88009de39748
ffff880149f666e0
[  802.005893] Call Trace:
[  802.005901]  [<ffffffff81711fd2>] ? dump_stack+0x41/0x51
[  802.005907]  [<ffffffff8103312a>] ? warn_slowpath_common+0x73/0x8b
[  802.005920]  [<ffffffffa007fc96>] ? check_crtc_state+0x7fd/0x844 [i915]
[  802.005924]  [<ffffffff810331da>] ? warn_slowpath_fmt+0x45/0x4a
[  802.005940]  [<ffffffffa00937fa>] ? intel_ddi_get_config+0xd5/0x12b [i915]
[  802.005952]  [<ffffffffa007fc96>] ? check_crtc_state+0x7fd/0x844 [i915]
[  802.005968]  [<ffffffffa008a7de>] ? intel_modeset_check_state+0x359/0x601
[i915]
[  802.005981]  [<ffffffffa008aaa3>] ? intel_set_mode+0x1d/0x27 [i915]
[  802.005993]  [<ffffffffa008b0b1>] ? intel_crtc_set_config+0x604/0x7fe [i915]
[  802.005999]  [<ffffffff81063cc0>] ? print_prefix+0x80/0x88
[  802.006012]  [<ffffffffa000c9c2>] ? drm_mode_set_config_internal+0x44/0xac
[drm]
[  802.006017]  [<ffffffffa004875e>] ? drm_fb_helper_set_par+0x55/0x9a
[drm_kms_helper]
[  802.006022]  [<ffffffff812ff5bb>] ? fb_set_var+0x246/0x32c
[  802.006026]  [<ffffffff810d569a>] ? kmem_cache_alloc+0x23/0xac
[  802.006031]  [<ffffffff81309451>] ? fbcon_blank+0x71/0x230
[  802.006035]  [<ffffffff810d9467>] ? do_dentry_open+0x172/0x23a
[  802.006039]  [<ffffffff81357f86>] ? do_unblank_screen+0xef/0x169
[  802.006043]  [<ffffffff813503c7>] ? vt_ioctl+0x4b0/0xf8a
[  802.006045]  [<ffffffff810e6f16>] ? path_openat+0x22d/0x5b9
[  802.006048]  [<ffffffff810e74c3>] ? user_path_at_empty+0x54/0x7d
[  802.006052]  [<ffffffff81348be0>] ? tty_ioctl+0x8b5/0x924
[  802.006055]  [<ffffffff810e7572>] ? do_filp_open+0x2d/0x75
[  802.006058]  [<ffffffff810e90e8>] ? do_vfs_ioctl+0x3f1/0x43a
[  802.006061]  [<ffffffff810f0ac3>] ? __fd_install+0x15/0x39
[  802.006064]  [<ffffffff810e917f>] ? SyS_ioctl+0x4e/0x7b
[  802.006068]  [<ffffffff8171c5e2>] ? system_call_fastpath+0x16/0x1b
[  802.006070] ---[ end trace 038a7ab38067b7de ]---

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