On CI_DRM_2805, the machine fi-bsw-n3050 hung when executing igt@kms_frontbuffer_tracking@basic. This is likely due to the following WARNING in the kernel logs. [ 471.074746] pipe C vblank wait timed out [ 471.074919] ------------[ cut here ]------------ [ 471.075239] WARNING: CPU: 1 PID: 3725 at drivers/gpu/drm/i915/intel_display.c:12866 intel_atomic_commit_tail+0xf4e/0xf70 [i915] [ 471.078448] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul i915 ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm r8169 mii lpc_ich i2c_hid prime_numbers i2c_designware_platform i2c_designware_core pinctrl_cherryview [ 471.079068] CPU: 1 PID: 3725 Comm: kms_frontbuffer Tainted: G U 4.12.0-CI-CI_DRM_2805+ #1 [ 471.079097] Hardware name: /NUC5CPYB, BIOS PYBSWCEL.86A.0058.2016.1102.1842 11/02/2016 [ 471.079127] task: ffff88013f94a600 task.stack: ffffc9000083c000 [ 471.079454] RIP: 0010:intel_atomic_commit_tail+0xf4e/0xf70 [i915] [ 471.085478] RSP: 0018:ffffc9000083fac8 EFLAGS: 00010292 [ 471.085491] RAX: 000000000000001c RBX: 0000000000000002 RCX: 0000000000000001 [ 471.085498] RDX: 0000000080000001 RSI: ffffffff81cbd240 RDI: 00000000ffffffff [ 471.085504] RBP: ffffc9000083fb70 R08: ffff88013f94ae60 R09: 0000000000000000 [ 471.085510] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88016cc68000 [ 471.085516] R13: 0000000000000430 R14: 0000000000000008 R15: 0000000000000004 [ 471.085522] FS: 00007f3269822a40(0000) GS:ffff88017fd00000(0000) knlGS:0000000000000000 [ 471.085529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 471.085535] CR2: 00007f6958f71000 CR3: 000000014a3b2000 CR4: 00000000001006e0 [ 471.085541] Call Trace: [ 471.085561] ? wake_atomic_t_function+0x30/0x30 [ 471.085650] intel_atomic_commit+0x3fb/0x500 [i915] [ 471.085663] ? drm_atomic_check_only+0x370/0x560 [ 471.085671] ? drm_connector_list_iter_end+0x2f/0x40 [ 471.085681] ? handle_conflicting_encoders+0x270/0x290 [ 471.085691] drm_atomic_commit+0x46/0x50 [ 471.085700] drm_atomic_helper_set_config+0x68/0x90 [ 471.085710] __drm_mode_set_config_internal+0x60/0x110 [ 471.085719] drm_mode_setcrtc+0x3e9/0x5f0 [ 471.085746] drm_ioctl+0x202/0x490 [ 471.085753] ? drm_mode_getcrtc+0x180/0x180 [ 471.085774] ? __do_page_fault+0x29e/0x560 [ 471.085785] do_vfs_ioctl+0x90/0x6d0 [ 471.085795] ? entry_SYSCALL_64_fastpath+0x5/0xb1 [ 471.085805] ? __this_cpu_preempt_check+0x13/0x20 [ 471.085814] ? trace_hardirqs_on_caller+0xe7/0x1c0 [ 471.085824] SyS_ioctl+0x3c/0x70 [ 471.085835] entry_SYSCALL_64_fastpath+0x1c/0xb1 [ 471.085842] RIP: 0033:0x7f3267d2bf07 [ 471.085848] RSP: 002b:00007ffd87a3b7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 471.085860] RAX: ffffffffffffffda RBX: ffffffff81470303 RCX: 00007f3267d2bf07 [ 471.085866] RDX: 00007ffd87a3b810 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 471.085872] RBP: ffffc9000083ff88 R08: 0000000000000000 R09: 000000000065c984 [ 471.085878] R10: 00000000024b7d20 R11: 0000000000000246 R12: 0000000000000000 [ 471.085884] R13: 0000000000000003 R14: 00000000c06864a2 R15: 0000000000000003 [ 471.085894] ? __this_cpu_preempt_check+0x13/0x20 [ 471.085908] Code: ff ff ff 48 83 c7 08 e8 d1 b6 f7 e0 4c 8b 85 78 ff ff ff 4d 85 c0 0f 85 d4 fd ff ff 8d 73 41 48 c7 c7 a0 13 22 a0 e8 0b 8a 02 e1 <0f> ff e9 be fd ff ff 8d 70 41 48 c7 c7 70 13 22 a0 e8 f5 89 02 [ 471.089248] ---[ end trace ac67ed0bfd283b5b ]--- Full logs: https://intel-gfx-ci.01.org/CI/CI_DRM_2805/fi-bsw-n3050/igt@kms_frontbuffer_tracking@basic.html
The following tests PASS on BSW with this configuration Tests List: igt@kms_frontbuffer_tracking@basic This is my configuration: ************************************************************** * * * * * * * * HARDWARE SPECIFICATIONS * * * * * * * * * * * ************************************************************** ============================================================== Essentials ============================================================== Processor Number N3700 Status Launched Launch Date Q1'15 Lithography 14 nm ============================================================== Performance ============================================================== # of Cores 4 # of Threads 4 Processor Base Frequency 1.60 GHz Burst Frequency 2.40 GHz Cache 2 MB L2 TDP 6 W Scenario Design Power (SDP) 4 W ============================================================== Memory Specifications ============================================================== Max Memory Size 8 GB Memory Types DDR3L-1600 Max # of Memory Channels 2 ECC Memory Supported No ============================================================== Graphics Specifications ============================================================== Processor Graphics Intel® HD Graphics Graphics Base Frequency 400.00 MHz Graphics Burst Frequency 700.00 MHz Graphics Video Max Memory 8 GB Graphics Output eDP/DP/HDMI Execution Units 16 DirectX* Support Yes OpenGL* Support Yes Intel® Quick Sync Video Yes Intel® InTru™ 3D Technology No Intel® Clear Video HD Technology Yes Intel® Clear Video Technology Yes Intel® Wireless Display Yes # of Displays Supported 3 ==================================================== Graphic Stack ==================================================== Component: drm tag: libdrm-2.4.81-33-g3876bc2 commit: 3876bc246a07070a6043159cd7623d4def9bbd4c Component: cairo tag: 1.15.6-2-g57b4050 commit: 57b40507dda3f58dfc8635548d606b86dc7bcf51 Component: intel-gpu-tools tag: intel-gpu-tools-1.19-112-g493151b commit: 493151b0768aa4ca535cef49cb7efa174a9c3a77 Component: piglit tag: piglit-v1 commit: 973892687cf5c2f8e2dbe1d22998b82736643787
How many times did you run the test? With which tests before? So far, it seems like we could only reproduce this bug once in 83 runs[1]. I would need to check on the pre-merge results to see if this bug has been caught there, but it gives you an idea that you will need to execute IGT way more often than once to actually catch this bug. But seriously, no need to try to reproduce [BAT] bug reports, we have all the data possible for developers to act on this. [1] https://intel-gfx-ci.01.org/cibuglog/index.html%3Faction_failures_history=-1&failures_test=igt@kms_frontbuffer_tracking@basic&failures_machine=fi-bsw-n3050.html
(In reply to Martin Peres from comment #2) >...But seriously, no need to try to reproduce [BAT] bug reports, we have all > the data possible for developers to act on this. Thank you for the information Martin.
Some history facts:https://intel-gfx-ci.01.org/cibuglog/index.html%3Faction_failures_history=181.html
Here is history data: https://intel-gfx-ci.01.org/cibuglog/index.html%3Faction_failures_history=181.html
Moving high since being sporadic: CI_DRM_3011: 2017-08-28 / 114 runs ago, with result 'incomplete', failure rate of 2 / 300 runs (1 %)
AH. One month gone. Lets resolve.
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