<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW/BDW Bisected]HDMI hot plug cause system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81856">81856</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>[HSW/BDW Bisected]HDMI hot plug cause system hang
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>blocker
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>lei.a.liu@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=103620" name="attach_103620" title="dmesg">attachment 103620</a> <a href="attachment.cgi?id=103620&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes
Good commit on drm-next: 008f40451d0e59f220a4fa13aaf75d04303a01a1
Non-working platforms: HSW BDW
==kernel==
--------------------------
origin/drm-intel-nightly: e967a525207bd40ab446e2f809907039f88e66f3(fails)
drm-intel-nightly: 2014y-07m-25d-23h-02m-06s integration manifest
origin/drm-intel-next-queued: eff9b57c1a91ccf309d57500ab6a365ba7be5712(works)
drm/i915: Update DRIVER_DATE to 20140725
origin/drm-intel-fixes: f4be89cecea437aaddd7700d05c6bdb5678041f7(works)
drm/i915: Simplify i915_gem_release_all_mmaps()
origin/drm-fixes: ec8a362f2e6e380e7a1f66a6c9a7f6c237ab3520(works)
drm/i915: Fix crash when failing to parse MIPI VBT
origin/drm-mext:e05444be705b5c7c7f85d7722b6f97f3a6732d54(fails)
drm/i915: fix initial fbdev setup warnings
==Bisect results==
----------------------------
Bisect shows: 0e32b39ceed665bfa4a77a4bc307b6652b991632 is the first bad commit
commit 0e32b39ceed665bfa4a77a4bc307b6652b991632
Author: Dave Airlie <<a href="mailto:airlied@redhat.com">airlied@redhat.com</a>>
AuthorDate: Fri May 2 14:02:48 2014 +1000
Commit: Dave Airlie <<a href="mailto:airlied@redhat.com">airlied@redhat.com</a>>
CommitDate: Tue Jul 22 11:20:26 2014 +1000
drm/i915: add DP 1.2 MST support (v0.7)
This adds DP 1.2 MST support on Haswell systems.
Notes:
a) this reworks irq handling for DP MST ports, so that we can
avoid the mode config locking in the current hpd handlers, as
we need to process up/down msgs at a better time.
Changes since v0.1:
use PORT_PCH_HOTPLUG to detect short vs long pulses
add a workqueue to deal with digital events as they can get blocked on the
main workqueue beyong mode_config mutex
fix a bunch of modeset checker warnings
acks irqs in the driver
cleanup the MST encoders
Changes since v0.2:
check irq status again in work handler
move around bring up and tear down to fix DPMS on/off
use path properties.
Changes since v0.3:
updates for mst apis
more state checker fixes
irq handling improvements
fbcon handling support
improved reference counting of link - fixes redocking.
Changes since v0.4:
handle gpu reset hpd reinit without oopsing
check link status on HPD irqs
fix suspend/resume
Changes since v0.5:
use proper functions to get max link/lane counts
fix another checker backtrace - due to connectors disappearing.
set output type in more places fro, unknown->displayport
don't talk to devices if no HPD asserted
check mst on short irqs only
check link status properly
rebase onto prepping irq changes.
drop unsued force_act
Changes since v0.6:
cleanup unused struct entry.
[airlied: fix some sparse warnings].
==Bug detailed description==
-----------------------------
HDMI hot plug cause system hang. Output shows Call Trace.
Output:
[ 65.043036] IP: [<ffffffff81719208>] __mutex_lock_slowpath+0x11b/0x196
[ 65.122420] PGD 0
[ 65.146919] Oops: 0002 [#1] SMP
[ 65.186307] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor
_support ppdev pcspkr i2c_i801 snd_hda_intel
snd_hda_controller snd_hda_codec sn
d_hwdep snd_pcm lpc_ich mfd_core
snd_timer snd soundcore battery parport_pc parp
ort ac acpi_cpufreq i915
video button drm_kms_helper drm
[ 65.503989] CPU: 0 PID: 24 Comm: kworker/u16:1 Not tainted
3.16.0-rc4_kcloud_
0e32b3_20140729+ #2
[ 65.610714] Workqueue: i915-dp i915_digport_work_func [i915]
[ 65.679535] task: ffff880149be0fc0 ti: ffff880149490000 task.ti:
ffff88014949
0000
[ 65.770416] RIP: 0010:[<ffffffff81719208>] [<ffffffff81719208>]
__mutex_lock
_slowpath+0x11b/0x196
[ 65.879350] RSP: 0018:ffff880149493c70 EFLAGS: 00010286
[ 65.943842] RAX: 0000000000000000 RBX: ffff8801492c2490 RCX:
0000000000000000
[ 66.030501] RDX: 0000000000000000 RSI: ffff880149be0fc0 RDI:
ffff8801492c2494
[ 66.117160] RBP: ffff880149493cb8 R08: ffff880149490000 R09:
000000000000b6bc
[ 66.203818] R10: ffff880002831740 R11: 000000000000baa6 R12:
ffff8801492c2494
[ 66.290475] R13: ffff880149be0fc0 R14: 00000000ffffffff R15:
ffff8801492c2498
[ 66.377129] FS: 0000000000000000(0000) GS:ffff88014ec00000(0000)
knlGS:00000
00000000000
[ 66.475397] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 66.545167] CR2: 0000000000000000 CR3: 00000000a8ce9000 CR4:
00000000003407f0
[ 66.631824] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 66.718478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 66.805135] Stack:
[ 66.829517] ffff8801492c2498 0000000000000000 ffffffff8109ef2f
0000000000000
007
[ 66.919768] ffff8801492c2490 ffff880149493ce0 ffff8801492c2490
0000000000000
00f
[ 67.010015] ffff8801492c2000 ffff8801492c2118 ffffffff81719299
0000000000000
007
[ 67.100283] Call Trace:
[ 67.129952] [<ffffffff8109ef2f>] ? irq_work_queue+0x4a/0x78
[ 67.198665] [<ffffffff81719299>] ? mutex_lock+0x16/0x25
[ 67.263162] [<ffffffffa00484fe>] ? drm_dp_dpcd_access+0x4f/0xeb
[drm_kms_hel
per]
[ 67.354048] [<ffffffffa00485ac>] ? drm_dp_dpcd_read+0x12/0x15
[drm_kms_helpe
r]
[ 67.442826] [<ffffffffa00c267e>] ? intel_dp_dpcd_read_wake+0x2c/0x51 [i915]
[ 67.528440] [<ffffffffa00c364d>] ? intel_dp_get_dpcd+0x32/0x14e [i915]
[ 67.608773] [<ffffffffa009cd15>] ? gen6_read32+0x6c/0x75 [i915]
[ 67.681727] [<ffffffffa00c7459>] ? intel_dp_hpd_pulse+0x7c/0x121 [i915]
[ 67.763120] [<ffffffffa009172b>] ? i915_digport_work_func+0x89/0xf9 [i915]
[ 67.847671] [<ffffffff8104740c>] ? process_one_work+0x1c1/0x2ca
[ 67.920608] [<ffffffff81047de0>] ? worker_thread+0x2fa/0x3ea
[ 67.990379] [<ffffffff81047ae6>] ? cancel_delayed_work_sync+0xa/0xa
[ 68.067539] [<ffffffff8104c313>] ? kthread+0xca/0xd2
[ 68.128864] [<ffffffff8104c249>] ? kthread_create_on_node+0x162/0x162
[ 68.208137] [<ffffffff8171a6ac>] ? ret_from_fork+0x7c/0xb0
[ 68.275795] [<ffffffff8104c249>] ? kthread_create_on_node+0x162/0x162
[ 68.355065] Code: 4c 8d 63 04 4c 89 e7 e8 d4 0f 00 00 8b 03 85 c0 79 23 48
8b
43 10 4c 8d 7b 08 48 89 63 10 41 83 ce ff 4c 89 3c 24 48 89 44 24 08
<48> 89 20
4c 89 6c 24 10 eb 2d 31 c0 87 03 ff c8 75 d5 eb 47 44
[ 68.591265] RIP [<ffffffff81719208>] __mutex_lock_slowpath+0x11b/0x196
[ 68.671703] RSP <ffff880149493c70>
[ 68.714035] CR2: 0000000000000000
[ 68.754255] ---[ end trace 20851570534d9ff2 ]---
[ 68.810554] BUG: unable to handle kernel paging request at ffffffffffffffd8
[ 68.895319] IP: [<ffffffff8104c712>] kthread_data+0x7/0xc
[ 68.960979] PGD 1ab9067 PUD 1abb067 PMD 0
[ 69.011009] Oops: 0000 [#2] SMP
[ 69.050395] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor
_support ppdev pcspkr i2c_i801 snd_hda_intel
snd_hda_controller snd_hda_codec sn
d_hwdep snd_pcm lpc_ich mfd_core
snd_timer snd soundcore battery parport_pc parp
ort ac acpi_cpufreq i915
video button drm_kms_helper drm
[ 69.368066] CPU: 0 PID: 24 Comm: kworker/u16:1 Tainted: G D
3.16.0
-rc4_kcloud_0e32b3_20140729+ #2
[ 69.487453] task: ffff880149be0fc0 ti: ffff880149490000 task.ti:
ffff88014949
0000
[ 69.578335] RIP: 0010:[<ffffffff8104c712>] [<ffffffff8104c712>]
kthread_data
+0x7/0xc
[ 69.673549] RSP: 0018:ffff8801494938e8 EFLAGS: 00010002
[ 69.738042] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
ffffffff831c1e00
[ 69.824701] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
ffff880149be0fc0
[ 69.911358] RBP: ffff8801494939e8 R08: 0000000000010056 R09:
0000000000000001
[ 69.998018] R10: 000000000000bbaa R11: 000000000000bef8 R12:
0000000000000000
[ 70.084677] R13: ffff880149be13d0 R14: ffff880149b10000 R15:
ffff880149be0fc0
[ 70.171334] FS: 0000000000000000(0000) GS:ffff88014ec00000(0000)
knlGS:00000
00000000000
[ 70.269604] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 70.339373] CR2: 0000000000000028 CR3: 00000000a8ce9000 CR4:
00000000003407f0
[ 70.426032] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 70.512692] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 70.599349] Stack:
[ 70.623737] ffffffff81047f65 ffff88014ec11500 ffffffff817176b9
ffff880149493
fd8
[ 70.714003] ffff880149be0fc0 0000000000011500 ffff88014ec11500
ffffffff81052
430
[ 70.804256] ffff8800abc7af40 0000000000000046 ffffffff81054a20
0000000000000
046
[ 70.894510] Call Trace:
[ 70.924179] [<ffffffff81047f65>] ? wq_worker_sleeping+0x8/0x75
[ 70.996065] [<ffffffff817176b9>] ? __schedule+0x11c/0x6ce
[ 71.062670] [<ffffffff81052430>] ? ttwu_do_wakeup+0xd/0x77
[ 71.130329] [<ffffffff81054a20>] ? try_to_wake_up+0x209/0x217
[ 71.201157] [<ffffffff810467ef>] ? __queue_work+0x1d0/0x1ed
[ 71.269873] [<ffffffff81037968>] ? do_exit+0x8c2/0x8d2
[ 71.333312] [<ffffffff81711de6>] ? printk+0x4f/0x51
[ 71.393583] [<ffffffff81004fea>] ? oops_end+0x9b/0xa0
[ 71.455966] [<ffffffff81711396>] ? no_context+0x296/0x2a2
[ 71.522571] [<ffffffff8102d68c>] ? __do_page_fault+0x136/0x445
[ 71.594453] [<ffffffff8105a3ba>] ? set_next_entity+0x32/0x55
[ 71.664225] [<ffffffff8105bc6a>] ? pick_next_task_fair+0xeb/0x3d1
[ 71.739273] [<ffffffff81717a6d>] ? __schedule+0x4d0/0x6ce
[ 71.805877] [<ffffffff8171bcd2>] ? page_fault+0x22/0x30
[ 71.870372] [<ffffffff81719208>] ? __mutex_lock_slowpath+0x11b/0x196
[ 71.948587] [<ffffffff8109ef2f>] ? irq_work_queue+0x4a/0x78
[ 72.017304] [<ffffffff81719299>] ? mutex_lock+0x16/0x25
[ 72.081799] [<ffffffffa00484fe>] ? drm_dp_dpcd_access+0x4f/0xeb
[drm_kms_hel
per]
[ 72.172680] [<ffffffffa00485ac>] ? drm_dp_dpcd_read+0x12/0x15
[drm_kms_helpe
r]
[ 72.261462] [<ffffffffa00c267e>] ? intel_dp_dpcd_read_wake+0x2c/0x51 [i915]
[ 72.347080] [<ffffffffa00c364d>] ? intel_dp_get_dpcd+0x32/0x14e [i915]
[ 72.427420] [<ffffffffa009cd15>] ? gen6_read32+0x6c/0x75 [i915]
[ 72.500369] [<ffffffffa00c7459>] ? intel_dp_hpd_pulse+0x7c/0x121 [i915]
[ 72.581765] [<ffffffffa009172b>] ? i915_digport_work_func+0x89/0xf9 [i915]
[ 72.666314] [<ffffffff8104740c>] ? process_one_work+0x1c1/0x2ca
[ 72.739252] [<ffffffff81047de0>] ? worker_thread+0x2fa/0x3ea
[ 72.809024] [<ffffffff81047ae6>] ? cancel_delayed_work_sync+0xa/0xa
[ 72.886183] [<ffffffff8104c313>] ? kthread+0xca/0xd2
[ 72.947509] [<ffffffff8104c249>] ? kthread_create_on_node+0x162/0x162
[ 73.026781] [<ffffffff8171a6ac>] ? ret_from_fork+0x7c/0xb0
[ 73.094440] [<ffffffff8104c249>] ? kthread_create_on_node+0x162/0x162
[ 73.173709] Code: 83 c4 78 5b 5d 41 5c c3 65 48 8b 04 25 80 b8 00 00 48 8b
80
b8 03 00 00 48 8b 40 c8 48 c1 e8 02 83 e0 01 c3 48 8b 87 b8 03 00 00
<48> 8b 40
d8 c3 50 48 8b b7 b8 03 00 00 ba 08 00 00 00 48 89 e7
[ 73.409956] RIP [<ffffffff8104c712>] kthread_data+0x7/0xc
[ 73.476674] RSP <ffff8801494938e8>
[ 73.519002] CR2: ffffffffffffffd8
[ 73.559224] ---[ end trace 20851570534d9ff3 ]---
[ 73.615274] Fixing recursive fault but reboot is needed!
Reproduce steps:
-------------------------
1. plugin HDMI</pre>
</div>
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