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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 - [BSW]S3 causes "WARNING: CPU: 1 PID: 4478 at drivers/gpu/drm/i915/i915_drv.c:1185 vlv_force_gfx_clock+0x41/0x1eb [i915]()""
href="https://bugs.freedesktop.org/show_bug.cgi?id=87086">87086</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BSW]S3 causes "WARNING: CPU: 1 PID: 4478 at drivers/gpu/drm/i915/i915_drv.c:1185 vlv_force_gfx_clock+0x41/0x1eb [i915]()"
</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>jinxianx.guo@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=110550" name="attach_110550" title="dmesg">attachment 110550</a> <a href="attachment.cgi?id=110550&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Not sure.
Here has another <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BSW] 3rd S3 fail with error, with i915 loaded"
href="show_bug.cgi?id=84903">bug 84903</a> about S3
Non-working platforms: BSW
==kernel==
--------------------------
origin/drm-intel-nightly: 2014_12_07(fails)
==Bug detailed description==
-----------------------------
S3 causes "WARNING: CPU: 1 PID: 4478 at drivers/gpu/drm/i915/i915_drv.c:1185
vlv_force_gfx_clock+0x41/0x1eb [i915]()"
Commit 2d3d111a8f34606469e589d3491c9a64f62310b8 fixed <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BSW] 3rd S3 fail with error, with i915 loaded"
href="show_bug.cgi?id=84903">bug 84903</a>, and involved
this call trace.
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Fri Nov 21 21:00:36 2014 +0200
drm/i915: Don't clobber crtc->new_config when nothing changes
Dmesg:
------------[ cut here ]------------
[ 532.651288] WARNING: CPU: 1 PID: 4478 at
drivers/gpu/drm/i915/i915_drv.c:1185 vlv_force_gfx_clock+0x41/0x1eb [i915]()
[ 532.651291] WARN_ON(!!(val & VLV_GFX_CLK_FORCE_ON_BIT) == force_on)
[ 532.651321] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel
snd_hda_controller pcspkr snd_hda_codec serio_raw snd_hwdep snd_pcm snd_timer
i2c_i801 lpc_ich snd mfd_core soundcore battery ac acpi_cpufreq option usb_wwan
usbserial i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea
[ 532.651328] CPU: 1 PID: 4478 Comm: kworker/u8:54 Tainted: G W
3.18.0-rc5_kcloud_2d3d11_20141202+ #40
[ 532.651338] Workqueue: events_unbound async_run_entry_fn
[ 532.651343] 0000000000000000 0000000000000009 ffffffff817788a0
ffff8801757afc98
[ 532.651347] ffffffff81036742 ffff8801757afc90 ffffffffa007ea40
ffff8801757ac000
[ 532.651351] ffff880175b00000 0000000000000000 ffff88017a5c8800
00000000ffffff92
[ 532.651353] Call Trace:
[ 532.651363] [<ffffffff817788a0>] ? dump_stack+0x41/0x51
[ 532.651370] [<ffffffff81036742>] ? warn_slowpath_common+0x78/0x90
[ 532.651397] [<ffffffffa007ea40>] ? vlv_force_gfx_clock+0x41/0x1eb [i915]
[ 532.651402] [<ffffffff8103679f>] ? warn_slowpath_fmt+0x45/0x4a
[ 532.651431] [<ffffffffa007ea40>] ? vlv_force_gfx_clock+0x41/0x1eb [i915]
[ 532.651458] [<ffffffffa007f9ea>] ? vlv_resume_prepare+0x511/0x546 [i915]
[ 532.651485] [<ffffffffa007fad8>] ? i915_resume_legacy+0x23/0x23 [i915]
[ 532.651512] [<ffffffffa007fa59>] ? i915_drm_resume_early+0x3a/0x96 [i915]
[ 532.651518] [<ffffffff813dd359>] ? dpm_run_callback+0x3a/0xc5
[ 532.651522] [<ffffffff813dd6b5>] ? device_resume_early+0x130/0x171
[ 532.651526] [<ffffffff813dd70a>] ? async_resume_early+0x14/0x38
[ 532.651532] [<ffffffff8104cfd7>] ? async_run_entry_fn+0x2d/0xbf
[ 532.651537] [<ffffffff810473f9>] ? process_one_work+0x1b3/0x316
[ 532.651541] [<ffffffff81047da1>] ? worker_thread+0x27d/0x369
[ 532.651545] [<ffffffff81047b24>] ? rescuer_thread+0x219/0x219
[ 532.651550] [<ffffffff8104b375>] ? kthread+0xce/0xd6
[ 532.651554] [<ffffffff8104b2a7>] ? kthread_create_on_node+0x162/0x162
[ 532.651560] [<ffffffff8177de2c>] ? ret_from_fork+0x7c/0xb0
[ 532.651564] [<ffffffff8104b2a7>] ? kthread_create_on_node+0x162/0x162
[ 532.651567] ---[ end trace c5048bcdf86a84e4 ]---
==Reproduce steps==
----------------------------
1. echo mem > /sys/power/state</pre>
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