<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Broadwell] Random crashes when starting KDE with DP-MST dual monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95316">95316</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Broadwell] Random crashes when starting KDE with DP-MST dual monitor
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg 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>darkbasic@linuxsystems.it
</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>Distro is Arch Linux. Kernel 4.5.2. xorg-server 1.18.3. xf86-video-intel
1:2.99.917+641+ge4ef6e9
[ 66.675970] ------------[ cut here ]------------
[ 66.675993] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:599 hsw_unclaimed_reg_debug+0x69/0x90
[i915]()
[ 66.675994] Unclaimed register detected after reading register 0x223a0
[ 66.675995] Modules linked in: cdc_ether usbnet r8152 mii visor bnep
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core
videodev btusb media btrtl btbcm btintel bluetooth crc16 joydev mousedev
snd_soc_sst_broadwell arc4 snd_soc_sst_haswell_pcm nvram snd_soc_sst_ipc msr
iTCO_wdt iTCO_vendor_support snd_soc_sst_dsp dell_laptop dcdbas dell_wmi
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1
nls_cp437 kvm_intel vfat snd_hda_codec_hdmi fat iwlmvm kvm mac80211 evdev
irqbypass input_leds mac_hid psmouse pcspkr serio_raw iwlwifi cfg80211
rtsx_pci_ms memstick intel_pch_thermal rfkill elan_i2c snd_soc_rt286
snd_soc_ssm4567 snd_soc_rl6347a i915 snd_soc_core snd_compress
snd_pcm_dmaengine ac97_bus i2c_hid snd_hda_intel snd_hda_codec drm_kms_helper
snd_hda_core snd_hwdep
[ 66.676039] snd_pcm drm lpc_ich i2c_i801 snd_timer intel_gtt syscopyarea
sysfillrect sysimgblt mei_me fb_sys_fops snd i2c_algo_bit mei soundcore shpchp
fan thermal wmi battery int3403_thermal video snd_soc_sst_acpi
snd_soc_sst_match 8250_dw gpio_lynxpoint processor_thermal_device
intel_soc_dts_iosf i2c_designware_platform intel_hid acpi_als int3402_thermal
i2c_designware_core sparse_keymap int340x_thermal_zone tpm_crb
spi_pxa2xx_platform kfifo_buf industrialio tpm_tis tpm int3400_thermal
acpi_thermal_rel ac fjes processor button acpi_pad sch_fq_codel ip_tables
x_tables btrfs xor raid6_pq jitterentropy_rng sha256_ssse3 sha256_generic hmac
drbg ansi_cprng algif_skcipher af_alg uas usb_storage dm_crypt dm_mod sd_mod
rtsx_pci_sdmmc atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel
[ 66.676078] aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd ahci libahci libata scsi_mod xhci_pci rtsx_pci xhci_hcd i8042 serio
sdhci_acpi sdhci led_class mmc_core pl2303 mos7720 usbserial parport
hid_generic usbhid hid usbcore usb_common
[ 66.676097] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.2-1-ARCH #1
[ 66.676098] Hardware name: Dell Inc. XPS 13 9343/0F5KF3, BIOS A07 11/11/2015
[ 66.676100] 0000000000000086 d59b74e4525801cb ffff88021e403ce0
ffffffff812dad91
[ 66.676102] ffff88021e403d28 ffffffffa07c8be8 ffff88021e403d18
ffffffff81078e52
[ 66.676105] ffff880210d20000 ffff880210d20080 0000000000000102
0000000000000006
[ 66.676107] Call Trace:
[ 66.676108] <IRQ> [<ffffffff812dad91>] dump_stack+0x63/0x82
[ 66.676116] [<ffffffff81078e52>] warn_slowpath_common+0x82/0xc0
[ 66.676119] [<ffffffff81078eec>] warn_slowpath_fmt+0x5c/0x80
[ 66.676122] [<ffffffff810e48aa>] ? mod_timer_pinned+0xda/0x1b0
[ 66.676133] [<ffffffffa07371f9>] hsw_unclaimed_reg_debug+0x69/0x90 [i915]
[ 66.676142] [<ffffffffa073aa55>] gen6_read32+0xd5/0x200 [i915]
[ 66.676152] [<ffffffffa072cbe8>] intel_lrc_irq_handler+0x38/0x240 [i915]
[ 66.676160] [<ffffffffa06e7ca6>] gen8_gt_irq_handler+0x1d6/0x250 [i915]
[ 66.676168] [<ffffffffa06e7dd2>] gen8_irq_handler+0xb2/0x6e0 [i915]
[ 66.676170] [<ffffffff810d1d51>] handle_irq_event_percpu+0x41/0x1f0
[ 66.676172] [<ffffffff810d1f39>] handle_irq_event+0x39/0x60
[ 66.676175] [<ffffffff810d52ab>] handle_edge_irq+0xab/0x130
[ 66.676177] [<ffffffff81019d4a>] handle_irq+0x1a/0x30
[ 66.676180] [<ffffffff815b350b>] do_IRQ+0x4b/0xd0
[ 66.676183] [<ffffffff815b1602>] common_interrupt+0x82/0x82
[ 66.676184] <EOI> [<ffffffff81462e3f>] ? cpuidle_enter_state+0x12f/0x2f0
[ 66.676188] [<ffffffff81463037>] cpuidle_enter+0x17/0x20
[ 66.676191] [<ffffffff810bad5a>] call_cpuidle+0x2a/0x40
[ 66.676193] [<ffffffff810bb155>] cpu_startup_entry+0x2c5/0x3a0
[ 66.676196] [<ffffffff815a4289>] rest_init+0x89/0x90
[ 66.676197] [<ffffffff8190c00f>] start_kernel+0x482/0x4a3
[ 66.676200] [<ffffffff8190b120>] ? early_idt_handler_array+0x120/0x120
[ 66.676202] [<ffffffff8190b339>] x86_64_start_reservations+0x2a/0x2c
[ 66.676204] [<ffffffff8190b485>] x86_64_start_kernel+0x14a/0x16d
[ 66.676205] ---[ end trace 19eb862c7760e148 ]---
[ 80.129350] general protection fault: 0000 [#1] PREEMPT SMP
[ 80.131323] Modules linked in: cdc_ether usbnet r8152 mii visor bnep
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core
videodev btusb media btrtl btbcm btintel bluetooth crc16 joydev mousedev
snd_soc_sst_broadwell arc4 snd_soc_sst_haswell_pcm nvram snd_soc_sst_ipc msr
iTCO_wdt iTCO_vendor_support snd_soc_sst_dsp dell_laptop dcdbas dell_wmi
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1
nls_cp437 kvm_intel vfat snd_hda_codec_hdmi fat iwlmvm kvm mac80211 evdev
irqbypass input_leds mac_hid psmouse pcspkr serio_raw iwlwifi cfg80211
rtsx_pci_ms memstick intel_pch_thermal rfkill elan_i2c snd_soc_rt286
snd_soc_ssm4567 snd_soc_rl6347a i915 snd_soc_core snd_compress
snd_pcm_dmaengine ac97_bus i2c_hid snd_hda_intel snd_hda_codec drm_kms_helper
snd_hda_core snd_hwdep
[ 80.140097] snd_pcm drm lpc_ich i2c_i801 snd_timer intel_gtt syscopyarea
sysfillrect sysimgblt mei_me fb_sys_fops snd i2c_algo_bit mei soundcore shpchp
fan thermal wmi battery int3403_thermal video snd_soc_sst_acpi
snd_soc_sst_match 8250_dw gpio_lynxpoint processor_thermal_device
intel_soc_dts_iosf i2c_designware_platform intel_hid acpi_als int3402_thermal
i2c_designware_core sparse_keymap int340x_thermal_zone tpm_crb
spi_pxa2xx_platform kfifo_buf industrialio tpm_tis tpm int3400_thermal
acpi_thermal_rel ac fjes processor button acpi_pad sch_fq_codel ip_tables
x_tables btrfs xor raid6_pq jitterentropy_rng sha256_ssse3 sha256_generic hmac
drbg ansi_cprng algif_skcipher af_alg uas usb_storage dm_crypt dm_mod sd_mod
rtsx_pci_sdmmc atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel
[ 80.149044] aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd ahci libahci libata scsi_mod xhci_pci rtsx_pci xhci_hcd i8042 serio
sdhci_acpi sdhci led_class mmc_core pl2303 mos7720 usbserial parport
hid_generic usbhid hid usbcore usb_common
[ 80.156794] CPU: 1 PID: 1084 Comm: pulseaudio Tainted: G W
4.5.2-1-ARCH #1
[ 80.161374] Hardware name: Dell Inc. XPS 13 9343/0F5KF3, BIOS A07 11/11/2015
[ 80.164597] task: ffff8801f7cc0000 ti: ffff8801f5800000 task.ti:
ffff8801f5800000
[ 80.168539] RIP: 0010:[<ffffffffa0742ac8>] [<ffffffffa0742ac8>]
i915_audio_component_get_eld+0x88/0x130 [i915]
[ 80.172726] RSP: 0018:ffff8801f58038f8 EFLAGS: 00010206
[ 80.176908] RAX: 3038317830303233 RBX: 0000000000000100 RCX:
ffff880213061400
[ 80.181167] RDX: 3038317830303233 RSI: 0000000000000001 RDI:
ffff880210d29888
[ 80.185503] RBP: ffff8801f5803928 R08: 0000000000000100 R09:
ffffffffa0742a40
[ 80.189895] R10: ffff8802101e40c0 R11: 0000000000000004 R12:
ffff8802100bb0d8
[ 80.194268] R13: ffff880210d29888 R14: 0000000000000000 R15:
ffff880210d20000
[ 80.198682] FS: 00007fac2dcf0800(0000) GS:ffff88021e480000(0000)
knlGS:0000000000000000
[ 80.203171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 80.207630] CR2: 0000000000d34028 CR3: 00000000d03ae000 CR4:
00000000003406e0
[ 80.212074] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 80.216515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 80.220947] Stack:
[ 80.225351] 00000001c97d1e0b ffff8800d9c8c000 ffff880210ce8000
ffff8800d9c8c328
[ 80.229835] ffff8802100bb000 ffff8802100bb0d0 ffff8801f5803938
ffffffffa05f59a3
[ 80.234280] ffff8801f5803998 ffffffffa05426a4 ffffffff817546ed
0000000000000000
[ 80.238751] Call Trace:
[ 80.243206] [<ffffffffa05f59a3>] snd_hdac_acomp_get_eld+0x33/0x40
[snd_hda_core]
[ 80.247726] [<ffffffffa05426a4>] hdmi_present_sense+0x204/0x2f0
[snd_hda_codec_hdmi]
[ 80.252287] [<ffffffffa0634650>] ? hda_call_codec_resume+0x120/0x120
[snd_hda_codec]
[ 80.256882] [<ffffffffa0542a4d>] generic_hdmi_resume+0x4d/0x60
[snd_hda_codec_hdmi]
[ 80.261544] [<ffffffffa06345fe>] hda_call_codec_resume+0xce/0x120
[snd_hda_codec]
[ 80.266199] [<ffffffffa0634685>] hda_codec_runtime_resume+0x35/0x50
[snd_hda_codec]
[ 80.270870] [<ffffffff8140df02>] __rpm_callback+0x32/0x70
[ 80.275519] [<ffffffffa0634650>] ? hda_call_codec_resume+0x120/0x120
[snd_hda_codec]
[ 80.280193] [<ffffffff8140df64>] rpm_callback+0x24/0x80
[ 80.284862] [<ffffffffa0634650>] ? hda_call_codec_resume+0x120/0x120
[snd_hda_codec]
[ 80.289571] [<ffffffff8140f379>] rpm_resume+0x4a9/0x6c0
[ 80.294306] [<ffffffff8140f5cf>] __pm_runtime_resume+0x3f/0x60
[ 80.299048] [<ffffffffa05f0ec3>] snd_hdac_power_up+0x13/0x20 [snd_hda_core]
[ 80.303801] [<ffffffffa063c0e1>] azx_pcm_open+0x1d1/0x390 [snd_hda_codec]
[ 80.308572] [<ffffffffa05d5f7b>] snd_pcm_open_substream+0x7b/0x130
[snd_pcm]
[ 80.313358] [<ffffffffa05d60e7>] snd_pcm_open+0xb7/0x240 [snd_pcm]
[ 80.318154] [<ffffffff810a24f0>] ? wake_up_q+0x70/0x70
[ 80.322960] [<ffffffffa05d6324>] snd_pcm_playback_open+0x44/0x70 [snd_pcm]
[ 80.327821] [<ffffffffa0507451>] snd_open+0xb1/0x180 [snd]
[ 80.332656] [<ffffffff811f261e>] chrdev_open+0xae/0x1d0
[ 80.337528] [<ffffffff811eb48f>] do_dentry_open+0x1ff/0x300
[ 80.342418] [<ffffffff811f2570>] ? cdev_put+0x30/0x30
[ 80.347294] [<ffffffff811ec526>] vfs_open+0x56/0x60
[ 80.352177] [<ffffffff811fb6e4>] path_openat+0x194/0x1080
[ 80.357095] [<ffffffff811fd961>] do_filp_open+0x91/0x100
[ 80.361994] [<ffffffff8120ce7c>] ? mntput_no_expire+0x2c/0x1b0
[ 80.366896] [<ffffffff8120a857>] ? __alloc_fd+0xc7/0x190
[ 80.371789] [<ffffffff811ec8cf>] do_sys_open+0x13f/0x210
[ 80.376692] [<ffffffff811ec9be>] SyS_open+0x1e/0x20
[ 80.381603] [<ffffffff815b0b6e>] entry_SYSCALL_64_fastpath+0x12/0x6d
[ 80.386601] Code: 95 06 41 be 00 00 00 00 75 1a 4c 89 ef e8 b1 be e6 e0 48
83 c4 08 44 89 f0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8b 81 20 0b 00 00 <0f> b6
90 c2 02 00 00 48 8d b0 c0 02 00 00 44 8d 34 95 04 00 00
[ 80.391872] RIP [<ffffffffa0742ac8>]
i915_audio_component_get_eld+0x88/0x130 [i915]
[ 80.397034] RSP <ffff8801f58038f8>
[ 80.439644] ---[ end trace 19eb862c7760e149 ]---</pre>
</div>
</p>
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