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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] Unclaimed register detected after suspend/resume"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85301">85301</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW] Unclaimed register detected after suspend/resume
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</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>patrik.lundquist@gmail.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=108208" name="attach_108208" title="Linux 3.18-rc1 dmesg with drm.debug=0xe i915.mmio_debug=1">attachment 108208</a> <a href="attachment.cgi?id=108208&action=edit" title="Linux 3.18-rc1 dmesg with drm.debug=0xe i915.mmio_debug=1">[details]</a></span>
Linux 3.18-rc1 dmesg with drm.debug=0xe i915.mmio_debug=1
Unclaimed register detected before reading register 0xc7204 after a couple of
suspend/resume using Linux v3.18-rc1.
[ 2783.939808] ------------[ cut here ]------------
[ 2783.939835] WARNING: CPU: 0 PID: 4819 at
/home/apw/COD/linux/drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.17+0x80/0xa0 [i915]()
[ 2783.939836] Unclaimed register detected before reading register 0xc7204
[ 2783.939856] Modules linked in: ctr ccm arc4 iwlmvm mac80211 iwlwifi
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm joydev
cfg80211 rtc_efi serio_raw snd_hda_codec_realtek snd_hda_codec_hdmi
snd_hda_codec_generic thinkpad_acpi nvram snd_hda_intel lpc_ich
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm mac_hid rtsx_pci_ms
intel_smartconnect snd_seq_midi memstick snd_seq_midi_event btusb rfcomm shpchp
bnep bluetooth snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore
binfmt_misc parport_pc ppdev nls_iso8859_1 lp parport sch_fq dm_crypt
rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel
aes_x86_64 lrw gf128mul glue_helper ablk_helper i915 cryptd psmouse e1000e ahci
i2c_algo_bit libahci ptp drm_kms_helper rtsx_pci pps_core drm wmi video [last
unloaded: ipmi_msghandler]
[ 2783.939858] CPU: 0 PID: 4819 Comm: kworker/0:3 Tainted: G W
3.18.0-031800rc1-generic #201410192135
[ 2783.939859] Hardware name: LENOVO 20AM009DMS/20AM009DMS, BIOS GIET76WW (2.26
) 08/27/2014
[ 2783.939874] Workqueue: events edp_panel_vdd_work [i915]
[ 2783.939876] 0000000000000210 ffff880231aa7c48 ffffffff827a1613
ffffffff82c54168
[ 2783.939877] ffff880231aa7c98 ffff880231aa7c88 ffffffff82074cfc
0000000000000001
[ 2783.939878] ffff88022dd70060 00000000000c7204 00000000000c7204
ffff88022dd70068
[ 2783.939879] Call Trace:
[ 2783.939883] [<ffffffff827a1613>] dump_stack+0x46/0x58
[ 2783.939885] [<ffffffff82074cfc>] warn_slowpath_common+0x8c/0xc0
[ 2783.939887] [<ffffffff82074de6>] warn_slowpath_fmt+0x46/0x50
[ 2783.939901] [<ffffffffc01a6610>] hsw_unclaimed_reg_debug.isra.17+0x80/0xa0
[i915]
[ 2783.939912] [<ffffffffc01a85b9>] gen6_read32+0x69/0x170 [i915]
[ 2783.939923] [<ffffffffc01a8550>] ? gen6_read64+0x160/0x160 [i915]
[ 2783.939936] [<ffffffffc01dc119>] edp_have_panel_vdd+0x39/0x50 [i915]
[ 2783.939948] [<ffffffffc01dcce4>] edp_panel_vdd_off_sync+0x44/0x170 [i915]
[ 2783.939959] [<ffffffffc01dd00a>] edp_panel_vdd_work+0x3a/0x50 [i915]
[ 2783.939962] [<ffffffff8208d6be>] process_one_work+0x14e/0x460
[ 2783.939964] [<ffffffff8208e03b>] worker_thread+0x11b/0x3f0
[ 2783.939965] [<ffffffff8208df20>] ? create_worker+0x1e0/0x1e0
[ 2783.939967] [<ffffffff82093bb9>] kthread+0xc9/0xe0
[ 2783.939968] [<ffffffff82093af0>] ? flush_kthread_worker+0x90/0x90
[ 2783.939970] [<ffffffff827aeebc>] ret_from_fork+0x7c/0xb0
[ 2783.939972] [<ffffffff82093af0>] ? flush_kthread_worker+0x90/0x90
[ 2783.939973] ---[ end trace c7d449c4daccb3aa ]---
[ 2783.939975] ------------[ cut here ]------------</pre>
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