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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@kms_chv_cursor_fail@pipe-b* - dmesg-warn - WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105185">105185</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CI] igt@kms_chv_cursor_fail@pipe-b* - dmesg-warn - WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>marta.lofstedt@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Same run different SNBs
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4274/shard-snb7/igt@kms_chv_cursor_fail@pipe-b-256x256-left-edge.html">https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4274/shard-snb7/igt@kms_chv_cursor_fail@pipe-b-256x256-left-edge.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4274/shard-snb1/igt@kms_chv_cursor_fail@pipe-b-64x64-bottom-edge.html">https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4274/shard-snb1/igt@kms_chv_cursor_fail@pipe-b-64x64-bottom-edge.html</a>
we hit WARN_ONCE in:
"
/* If mode timing undefined, just return as no-op:
* Happens during initial modesetting of a crtc.
*/
if (mode->crtc_clock == 0) {
DRM_DEBUG("crtc %u: Noop due to uninitialized mode.\n", pipe);
WARN_ON_ONCE(drm_drv_uses_atomic_modeset(dev));
return false;
}
"
Strange that the "Noop due to uninitialized mode" is not in dmesg.
<4>[ 36.477658] WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614
drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
<4>[ 36.477692] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic i915 x86_pkg_temp_thermal intel_powerclamp coretemp
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec
snd_hwdep lpc_ich snd_hda_core broadcom bcm_phy_lib snd_pcm tg3 mei_me mei
prime_numbers
<4>[ 36.477750] CPU: 4 PID: 1734 Comm: kms_chv_cursor_ Tainted: G U
4.16.0-rc1-CI-CI_DRM_3809+ #1
<4>[ 36.477753] Hardware name: Dell Inc. XPS 8300 /0Y2MRG, BIOS A06
10/17/2011
<4>[ 36.477757] RIP: 0010:drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
<4>[ 36.477760] RSP: 0018:ffff88022fb03d10 EFLAGS: 00010086
<4>[ 36.477765] RAX: ffffffffa0294b40 RBX: ffff880211280000 RCX:
0000000000000001
<4>[ 36.477768] RDX: ffffffff820e7b78 RSI: 0000000000000001 RDI:
ffffffff82068c22
<4>[ 36.477771] RBP: ffff88022fb03d70 R08: 0000000000000000 R09:
ffffffff815d24d0
<4>[ 36.477774] R10: 0000000000000000 R11: ffffffffa0164ca0 R12:
0000000000000001
<4>[ 36.477776] R13: ffff880219a19bf8 R14: ffff880219a19f20 R15:
0000000000000000
<4>[ 36.477780] FS: 00007ff22da26a40(0000) GS:ffff88022fb00000(0000)
knlGS:0000000000000000
<4>[ 36.477783] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 36.477786] CR2: 00005564829458c8 CR3: 00000002205da004 CR4:
00000000000606e0
<4>[ 36.477788] Call Trace:
<4>[ 36.477791] <IRQ>
<4>[ 36.477809] drm_get_last_vbltimestamp+0x36/0x50
<4>[ 36.477815] drm_update_vblank_count+0x64/0x240
<4>[ 36.477827] drm_crtc_accurate_vblank_count+0x41/0xb0
<4>[ 36.477869] display_pipe_crc_irq_handler+0x176/0x220 [i915]
<4>[ 36.477918] i9xx_pipe_crc_irq_handler+0xfe/0x150 [i915]
<4>[ 36.477962] ironlake_irq_handler+0x618/0xa30 [i915]
<4>[ 36.477978] __handle_irq_event_percpu+0x3c/0x340
<4>[ 36.477990] handle_irq_event_percpu+0x1b/0x50
<4>[ 36.477997] handle_irq_event+0x2f/0x50
<4>[ 36.478006] handle_edge_irq+0xe4/0x1b0
<4>[ 36.478017] handle_irq+0x11/0x20
<4>[ 36.478023] do_IRQ+0x5e/0x120
<4>[ 36.478036] common_interrupt+0x9f/0x9f
<4>[ 36.478040] </IRQ>
<4>[ 36.478044] RIP: 0010:vprintk_emit+0x23b/0x4f0
<4>[ 36.478047] RSP: 0018:ffffc9000035f900 EFLAGS: 00000246 ORIG_RAX:
ffffffffffffffdd
<4>[ 36.478052] RAX: ffff88021073cf40 RBX: 0000000000000007 RCX:
0000000000000006
<4>[ 36.478055] RDX: 000000000000131f RSI: ffffffff8210f919 RDI:
ffffffff820c00a7
<4>[ 36.478058] RBP: ffffc9000035f950 R08: ffff88021073d8e0 R09:
0000000029d3a949
<4>[ 36.478061] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000246
<4>[ 36.478063] R13: 0000000000000000 R14: 0000000000000030 R15:
0000000000000000
<4>[ 36.478099] printk+0x3e/0x46
<4>[ 36.478151] ? intel_disable_pipe+0x3c/0x170 [i915]
<4>[ 36.478160] drm_printk+0x89/0x90
<4>[ 36.478170] ? trace_hardirqs_on_caller+0xde/0x1c0
<4>[ 36.478222] intel_disable_pipe+0x3c/0x170 [i915]
<4>[ 36.478272] ironlake_crtc_disable+0x6a/0x6d0 [i915]
<4>[ 36.478278] ? __mutex_unlock_slowpath+0x38/0x270
<4>[ 36.478332] intel_atomic_commit_tail+0x1bb/0xce0 [i915]
<4>[ 36.478393] intel_atomic_commit+0x256/0x330 [i915]
<4>[ 36.478404] restore_fbdev_mode_atomic+0x199/0x1f0
<4>[ 36.478432] drm_fb_helper_restore_fbdev_mode_unlocked+0x42/0x90
<4>[ 36.478439] drm_fb_helper_set_par+0x24/0x50
<4>[ 36.478486] intel_fbdev_set_par+0x11/0x60 [i915]
<4>[ 36.478494] fbcon_init+0x594/0x620
<4>[ 36.478509] visual_init+0xca/0x120
<4>[ 36.478517] do_bind_con_driver+0x1bb/0x3a0
<4>[ 36.478534] do_unbind_con_driver+0x1a1/0x210
<4>[ 36.478552] store_bind+0xb8/0x1b0
<4>[ 36.478563] kernfs_fop_write+0xfe/0x180
<4>[ 36.478574] __vfs_write+0x1e/0x130
<4>[ 36.478581] ? rcu_read_lock_sched_held+0x6f/0x80
<4>[ 36.478585] ? rcu_sync_lockdep_assert+0x25/0x50
<4>[ 36.478590] ? __sb_start_write+0xd9/0x1f0
<4>[ 36.478594] ? __sb_start_write+0xf3/0x1f0
<4>[ 36.478605] vfs_write+0xbd/0x1b0
<4>[ 36.478614] SyS_write+0x40/0xa0
<4>[ 36.478624] do_syscall_64+0x68/0x1a0
<4>[ 36.478632] entry_SYSCALL_64_after_hwframe+0x26/0x9b
<4>[ 36.478635] RIP: 0033:0x7ff22befe670
<4>[ 36.478638] RSP: 002b:00007fff41fed078 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
<4>[ 36.478644] RAX: ffffffffffffffda RBX: 000055648293d890 RCX:
00007ff22befe670
<4>[ 36.478646] RDX: 0000000000000002 RSI: 0000556480986658 RDI:
0000000000000008
<4>[ 36.478649] RBP: 00007fff41fed0a0 R08: 000055648293d903 R09:
0000000000000020
<4>[ 36.478652] R10: 0000000000000073 R11: 0000000000000246 R12:
000055648098663c
<4>[ 36.478655] R13: 0000556480986606 R14: 000055648293d903 R15:
0000556480986642
<4>[ 36.478678] Code: e1 48 c7 c2 78 7b 0e 82 be 01 00 00 00 48 c7 c7 22 8c
06 82 e8 64 ec ff ff 48 8b 83 c8 07 00 00 48 83 78 28 00 0f 84 e2 fe ff ff <0f>
ff 45 31 ed e9 db fe ff ff 41 b8 d3 4d 62 10 89 c8 6a 03 41</pre>
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