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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW Regression]igt/kms_flip/vblank-vs-modeset-suspend causes "WARNING: CPU: 2 PID: 1051 at drivers/gpu/drm/i915/i915_irq.c:267 intel_gen6_powersave_work+0xa49/0xf1e [i915]()""
href="https://bugs.freedesktop.org/show_bug.cgi?id=80376">80376</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW Regression]igt/kms_flip/vblank-vs-modeset-suspend causes "WARNING: CPU: 2 PID: 1051 at drivers/gpu/drm/i915/i915_irq.c:267 intel_gen6_powersave_work+0xa49/0xf1e [i915]()"
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=101553" name="attach_101553" title="dmesg">attachment 101553</a> <a href="attachment.cgi?id=101553&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes.
Good commit on -next-queued: 27b6c122512ca30399bb1b39cc42eda83901f304
Non-working platforms: BDW
==kernel==
--------------------------
origin/drm-intel-nightly: 78f31a2d50183db12c0532eadcf486b9ebfa5f6d(fails)
drm-intel-nightly: 2014y-06m-19d-21h-00m-17s integration manifest
origin/drm-intel-next-queued: 9c33baa6b3bbb01c1a88dceba986b20e6642cf31(fails)
drivers/i915: Fix unnoticed failure of init_ring_common()
origin/drm-intel-fixes: 4a11e398b39b018c7aa3b22267cfdf3b7fae3625(works)
drm/i915: cache hw power well enabled state
==Bug detailed description==
-----------------------------
igt/kms_flip/vblank-vs-modeset-suspend causes "WARNING: CPU: 2 PID: 1051 at
drivers/gpu/drm/i915/i915_irq.c:267 intel_gen6_powersave_work+0xa49/0xf1e
[i915]()"
Output:
root@x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest vblank-vs-modeset-suspend
IGT-Version: 1.7-gfedb9b6 (x86_64) (Linux:
3.15.0-rc8_drm-intel-nightly_78f31a_20140623+ x86_64)
Using monotonic timestamps
Beginning vblank-vs-modeset-suspend on crtc 6, connector 17
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
.rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from "mem" using /dev/rtc0 at Sat Jan 13 21:11:13 2001
.rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from "mem" using /dev/rtc0 at Sat Jan 13 21:11:45 2001
vblank-vs-modeset-suspend on crtc 6, connector 17: PASSED
Beginning vblank-vs-modeset-suspend on crtc 10, connector 17
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
Test assertion failure function wait_for_events, file kms_flip.c:1174:
Last errno: 0, Success
Failed assertion: ret > 0
select timed out or error (ret 0)
Subtest vblank-vs-modeset-suspend: FAIL
Dmesg shows:
[ 216.231742] WARNING: CPU: 2 PID: 1051 at drivers/gpu/drm/i915/i915_irq.c:267
intel_gen6_powersave_work+0xa49/0xf1e [i915]()
[ 216.231754] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor_support ppdev pcspkr snd_hda_intel i2c_i801 snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq i915 video button drm_kms_helper drm
[ 216.231757] CPU: 2 PID: 1051 Comm: kworker/2:1 Tainted: G W
3.15.0-rc8_drm-intel-nightly_78f31a_20140623+ #3826
[ 216.231766] Workqueue: events intel_gen6_powersave_work [i915]
[ 216.231769] 0000000000000000 0000000000000009 ffffffff81772bca
0000000000000000
[ 216.231770] ffffffff81036e54 ffff880002f00000 ffffffffa0070883
ffff880002f00000
[ 216.231772] ffff880002f00000 ffff880145349000 ffff880002f00000
ffff880002f08238
[ 216.231773] Call Trace:
[ 216.231778] [<ffffffff81772bca>] ? dump_stack+0x41/0x51
[ 216.231781] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 216.231790] [<ffffffffa0070883>] ? intel_gen6_powersave_work+0xa49/0xf1e
[i915]
[ 216.231798] [<ffffffffa0070883>] ? intel_gen6_powersave_work+0xa49/0xf1e
[i915]
[ 216.231801] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 216.231804] [<ffffffff8104ac77>] ? process_scheduled_works+0x18/0x25
[ 216.231807] [<ffffffff8104b39f>] ? worker_thread+0x1e1/0x2bc
[ 216.231809] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 216.231811] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 216.231814] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 216.231816] [<ffffffff8177e9bc>] ? ret_from_fork+0x7c/0xb0
[ 216.231818] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
==Reproduce steps==
----------------------------
1. ./kms_flip --run-subtest vblank-vs-modeset-suspend</pre>
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