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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 - [BDW]Piglit glx_GLX_OML_sync_control_timing_-divisor_1 causes WARNING drivers/gpu/drm/i915/intel_uncore.c:726 hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86948">86948</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]Piglit glx_GLX_OML_sync_control_timing_-divisor_1 causes WARNING drivers/gpu/drm/i915/intel_uncore.c:726 hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (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>huax.lu@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>Created <span class=""><a href="attachment.cgi?id=110381" name="attach_110381" title="dmesg">attachment 110381</a> <a href="attachment.cgi?id=110381&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
Non-working platforms: BDW
Libdrm:
(master)libdrm-2.4.58-19-gf99522e678dbbaffeca9462a8edcbe900574dc12
Mesa: (master)7b0067d23a6f64cf83c42e7f11b2cd4100c569fe
Xserver:
(master)xorg-server-1.16.99.901-21-g4b0d0df34f10a88c10cb23dd50087b59f5c4fece
Xf86_video_intel:(master)2.99.916-165-g9c2c485df9fd39ae36779f765a892e36835a8001
Libva: (master)c095cc6cf08523cd0dffcfe5ac4bce9122527f22
Libva_intel_driver:(master)edbb8cdada09cd116103e68f942b0889fd767391
==kernel==
--------------------------
drm-intel-nightly/691817ae2a8f37cb1df33f21a6dd1c15a8832693
drm-intel-next-queued/5c8437fa462d45f5a6ae1020d340f6c8e6763df6
drm-intel-fixes/009d0431c3914de64666bec0d350e54fdd59df6a
==Bug detailed description==
-----------------------------
It causes "WARNING: CPU: 0 PID: 4925 at drivers/gpu/drm/i915/intel_uncore.c:726
hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]()".
Test on latest drm-intel-nightly, drm-intel-next-queued and drm-intel-fixes
kernel, they all have this issue. Test on earlier
kernel(2014_10_23/drm-intel-next-queued/1577c3c641970550bf9c4038f152e33c58428045),
it also has this issue.
output:
root@x-bdw05:/GFX/Test/Piglit/piglit# bin/glx-oml-sync-control-timing -divisor
1
libGL: OpenDriver: trying /opt/X11R7/lib/dri/tls/i965_dri.so
libGL: OpenDriver: trying /opt/X11R7/lib/dri/i965_dri.so
libGL: Error in /etc/drirc line 1, column 0: no element found.
libGL: Error in /root/.drirc line 1, column 0: no element found.
libGL: Error in /etc/drirc line 1, column 0: no element found.
libGL: Error in /root/.drirc line 1, column 0: no element found.
PIGLIT: {"result": "pass" }
root@x-bdw05:/GFX/Test/Piglit/piglit# bin/glx-oml-sync-control-timing -divisor
1
libGL: OpenDriver: trying /opt/X11R7/lib/dri/tls/i965_dri.so
libGL: OpenDriver: trying /opt/X11R7/lib/dri/i965_dri.so
libGL: Error in /etc/drirc line 1, column 0: no element found.
libGL: Error in /root/.drirc line 1, column 0: no element found.
libGL: Error in /etc/drirc line 1, column 0: no element found.
libGL: Error in /root/.drirc line 1, column 0: no element found.
iteration 0 woke up 1 MSCs later than expected
PIGLIT: {"result": "warn" }
[ 85.973496] ------------[ cut here ]------------
[ 85.973516] WARNING: CPU: 0 PID: 4925 at
drivers/gpu/drm/i915/intel_uncore.c:726
hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]()
[ 85.973519] Unclaimed register detected before writing to register 0x44404
[ 85.973519] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi pcspkr snd_hda_intel snd_hda_controller i2c_i801
snd_hda_codec snd_hwdep lpc_ich snd_pcm mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea
[ 85.973536] CPU: 0 PID: 4925 Comm: X Not tainted
3.18.0-rc7_drm-intel-nightly_691817_20141202+ #2170
[ 85.973537] 0000000000000000 0000000000000009 ffffffff8178d622
ffff8800022efbe8
[ 85.973540] ffffffff8103a8cc ffff880002cd3bc0 ffffffffa00c0974
000000000000003f
[ 85.973542] ffff880002cd0060 0000000000044404 0000000000044404
000000006ffff8ee
[ 85.973544] Call Trace:
[ 85.973550] [<ffffffff8178d622>] ? dump_stack+0x41/0x51
[ 85.973554] [<ffffffff8103a8cc>] ? warn_slowpath_common+0x78/0x90
[ 85.973565] [<ffffffffa00c0974>] ?
hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]
[ 85.973568] [<ffffffff8103a97c>] ? warn_slowpath_fmt+0x45/0x4a
[ 85.973578] [<ffffffffa00c0974>] ?
hsw_unclaimed_reg_debug.isra.12+0x62/0x72 [i915]
[ 85.973587] [<ffffffffa00c135d>] ? gen8_write32+0x8e/0x11a [i915]
[ 85.973597] [<ffffffffa00ab338>] ? gen8_enable_vblank+0x5a/0x85 [i915]
[ 85.973603] [<ffffffffa0010ecc>] ? drm_vblank_enable+0x51/0xa7 [drm]
[ 85.973609] [<ffffffffa001124b>] ? drm_vblank_get+0x46/0xa6 [drm]
[ 85.973615] [<ffffffffa00123b1>] ? drm_wait_vblank+0x8f/0x4c6 [drm]
[ 85.973620] [<ffffffffa0010738>] ? drm_ioctl+0x279/0x3bc [drm]
[ 85.973626] [<ffffffffa0012322>] ? drm_modeset_ctl+0x49/0x49 [drm]
[ 85.973629] [<ffffffff8107b426>] ? enqueue_hrtimer+0x36/0x6d
[ 85.973631] [<ffffffff8107bb1f>] ? __hrtimer_start_range_ns+0x276/0x29f
[ 85.973634] [<ffffffff8111e6e3>] ? do_vfs_ioctl+0x3ec/0x435
[ 85.973637] [<ffffffff8111e775>] ? SyS_ioctl+0x49/0x78
[ 85.973640] [<ffffffff81792cd2>] ? system_call_fastpath+0x12/0x17
[ 85.973641] ---[ end trace 8075263230200184 ]---
[ 85.975191] ------------[ cut here ]------------
Reproduce steps:
-------------------------
1. xinit&
2. ./bin/glx-oml-sync-control-timing -divisor 1 -auto</pre>
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