kernel-packages team mailing list archive

Thread
Date
[Bug 1576764] Re: Kernel bug caused by XRandR / Video Drivers

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: frew <frioux@xxxxxxxxx>
Date: Thu, 05 May 2016 20:42:58 -0000
Reply-to: Bug 1576764 <1576764@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Look it happened again with the upstream kernel!

May  5 13:37:44 zfp kernel: [   61.795795] general protection fault: 0000 [#1] SMP 
May  5 13:37:44 zfp kernel: [   61.795822] Modules linked in: snd_hda_codec_hdmi(+) joydev input_leds serio_raw snd_hda_codec_realtek iwlwifi snd_hda_codec_generic snd_hda_intel thinkpad_acpi snd_hda_codec rtsx_pci_ms cfg80211 snd_hda_core memstick nvram snd_hwdep lpc_ich mei_me snd_seq_midi mei snd_seq_midi_event snd_pcm snd_rawmidi snd_seq snd_seq_device ie31200_edac shpchp snd_timer edac_core snd soundcore mac_hid sch_fq_codel nfsd auth_rpcgss nfs_acl lockd parport_pc grace ppdev sunrpc lp parport autofs4 algif_skcipher af_alg dm_crypt hid_thingm hid_generic hid_logitech_hidpp hid_logitech_dj usbhid hid rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw nouveau i915 gf128mul glue_helper ablk_helper cryptd mxm_wmi ahci ttm libahci psmouse i2c_algo_bit drm_kms_helper e1000e syscopyarea rtsx_pci sysfillrect sysimgblt fb_sys_fops ptp pps_core drm wmi fjes video
May  5 13:37:44 zfp kernel: [   61.796218] CPU: 3 PID: 588 Comm: modprobe Not tainted 4.6.0-040600rc6-generic #201605012031
May  5 13:37:44 zfp kernel: [   61.796244] Hardware name: LENOVO 20AN006LUS/20AN006LUS, BIOS GLET77WW (2.31 ) 01/27/2015
May  5 13:37:44 zfp kernel: [   61.796273] task: ffff8804266d2ac0 ti: ffff8800a8810000 task.ti: ffff8800a8810000
May  5 13:37:44 zfp kernel: [   61.796299] RIP: 0010:[<ffffffffc0266cb8>]  [<ffffffffc0266cb8>] i915_audio_component_get_eld+0x88/0x130 [i915]
May  5 13:37:44 zfp kernel: [   61.796362] RSP: 0018:ffff8800a88139f8  EFLAGS: 00010282
May  5 13:37:44 zfp kernel: [   61.796383] RAX: f852f845f857f851 RBX: 0000000000000100 RCX: ffff880425aa3d00
May  5 13:37:44 zfp kernel: [   61.796410] RDX: f852f845f857f851 RSI: 0000000000000001 RDI: ffff880424fd9a58
May  5 13:37:44 zfp kernel: [   61.796439] RBP: ffff8800a8813a28 R08: 0000000000000100 R09: ffffffffc0266c30
May  5 13:37:44 zfp kernel: [   61.796467] R10: ffff8804298e8a10 R11: ffff88042ab08780 R12: ffff8804298e8a10
May  5 13:37:44 zfp kernel: [   61.796493] R13: ffff880424fd9a58 R14: 0000000000000000 R15: ffff880424fd0000
May  5 13:37:44 zfp kernel: [   61.796517] FS:  00007f8170bb5700(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000
May  5 13:37:44 zfp kernel: [   61.796547] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May  5 13:37:44 zfp kernel: [   61.796568] CR2: 00007f93bc5f1e98 CR3: 0000000426484000 CR4: 00000000001406e0
May  5 13:37:44 zfp kernel: [   61.796595] Stack:
May  5 13:37:44 zfp kernel: [   61.796604]  00000001c06409cb ffff880425a04000 ffff88042aa5a000 ffff8804298e89c8
May  5 13:37:44 zfp kernel: [   61.796639]  ffff8804298e8800 ffff880425a04330 ffff8800a8813a38 ffffffffc07049ac
May  5 13:37:44 zfp kernel: [   61.796672]  ffff8800a8813aa0 ffffffffc07158db 0000000027ec128d ffff88042ab096c0
May  5 13:37:44 zfp kernel: [   61.796706] Call Trace:
May  5 13:37:44 zfp kernel: [   61.796724]  [<ffffffffc07049ac>] snd_hdac_acomp_get_eld+0x3c/0x60 [snd_hda_core]
May  5 13:37:44 zfp kernel: [   61.796754]  [<ffffffffc07158db>] hdmi_present_sense+0xab/0x3b0 [snd_hda_codec_hdmi]
May  5 13:37:44 zfp kernel: [   61.796785]  [<ffffffffc0716020>] generic_hdmi_build_controls+0x150/0x1f0 [snd_hda_codec_hdmi]
May  5 13:37:44 zfp kernel: [   61.796828]  [<ffffffffc0803c3a>] snd_hda_codec_build_controls+0x1ba/0x200 [snd_hda_codec]
May  5 13:37:44 zfp kernel: [   61.796866]  [<ffffffffc07fe477>] hda_codec_driver_probe+0x87/0x100 [snd_hda_codec]
May  5 13:37:44 zfp kernel: [   61.796900]  [<ffffffff8155872c>] driver_probe_device+0x22c/0x440
May  5 13:37:44 zfp kernel: [   61.796927]  [<ffffffff81558a11>] __driver_attach+0xd1/0xf0
May  5 13:37:44 zfp kernel: [   61.796951]  [<ffffffff81558940>] ? driver_probe_device+0x440/0x440
May  5 13:37:44 zfp kernel: [   61.796972]  [<ffffffff815561cc>] bus_for_each_dev+0x6c/0xc0
May  5 13:37:44 zfp kernel: [   61.796994]  [<ffffffff81557e0e>] driver_attach+0x1e/0x20
May  5 13:37:44 zfp kernel: [   61.797014]  [<ffffffff8155789b>] bus_add_driver+0x1eb/0x280
May  5 13:37:44 zfp kernel: [   61.797037]  [<ffffffffc071f000>] ? 0xffffffffc071f000
May  5 13:37:44 zfp kernel: [   61.797057]  [<ffffffff81559390>] driver_register+0x60/0xe0
May  5 13:37:44 zfp kernel: [   61.797085]  [<ffffffffc07fe0da>] __hda_codec_driver_register+0x5a/0x60 [snd_hda_codec]
May  5 13:37:44 zfp kernel: [   61.797117]  [<ffffffffc071f01e>] hdmi_driver_init+0x1e/0x1000 [snd_hda_codec_hdmi]
May  5 13:37:44 zfp kernel: [   61.797147]  [<ffffffff81002123>] do_one_initcall+0xb3/0x200
May  5 13:37:44 zfp kernel: [   61.797170]  [<ffffffff811b5e2a>] ? kvfree+0x2a/0x40
May  5 13:37:44 zfp kernel: [   61.797193]  [<ffffffff811fa886>] ? kmem_cache_alloc_trace+0x176/0x1e0
May  5 13:37:44 zfp kernel: [   61.797221]  [<ffffffff81193136>] do_init_module+0x5f/0x1df
May  5 13:37:44 zfp kernel: [   61.797244]  [<ffffffff8110e148>] load_module+0x16a8/0x1c40
May  5 13:37:44 zfp kernel: [   61.797267]  [<ffffffff8110a800>] ? __symbol_put+0x60/0x60
May  5 13:37:44 zfp kernel: [   61.797292]  [<ffffffff8139a98d>] ? ima_post_read_file+0x7d/0xa0
May  5 13:37:44 zfp kernel: [   61.797314]  [<ffffffff8110e956>] SYSC_finit_module+0xe6/0x120
May  5 13:37:44 zfp kernel: [   61.797335]  [<ffffffff8110e9ae>] SyS_finit_module+0xe/0x10
May  5 13:37:44 zfp kernel: [   61.797358]  [<ffffffff818408b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
May  5 13:37:44 zfp kernel: [   61.797383] Code: 95 06 41 be 00 00 00 00 75 1a 4c 89 ef e8 a1 7b 5d c1 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 
May  5 13:37:44 zfp kernel: [   61.797538] RIP  [<ffffffffc0266cb8>] i915_audio_component_get_eld+0x88/0x130 [i915]
May  5 13:37:44 zfp kernel: [   61.797590]  RSP <ffff8800a88139f8>
May  5 13:37:44 zfp kernel: [   61.806101] ---[ end trace 338ace8558257865 ]---


** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Tags added: kernel-bug-exists-upstream

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1576764

Title:
  Kernel bug caused by XRandR / Video Drivers

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Here are two stack traces showing the issue:

  
  Apr 29 08:33:05 zfp kernel: [34730.860474] general protection fault: 0000 [#1] SMP 
  Apr 29 08:33:05 zfp kernel: [34730.860507] Modules linked in: ctr ccm xt_nat xt_tcpudp ipt_REJECT nf_reject_ipv4 pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfcomm veth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay xt_multiport iptable_filter ip_tables x_tables bnep arc4 snd_usb_audio snd_usbmidi_lib uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel bluetooth kvm irqbypass input_leds joydev serio_raw iwlmvm mac80211 snd_seq_midi snd_hda_codec_hdmi snd_hda_codec_realtek snd_seq_midi_event iwlwifi snd_hda_codec_generic thinkpad_acpi snd_rawmidi nvram cfg80211 rtsx_pci_ms snd_hda_intel memstick lpc_ich snd_hda_codec mei_me mei snd_hda_core snd_hwdep snd_pcm ie31200_edac snd_seq edac_core snd_seq_device snd_timer snd soundcore shpchp mac_hid sch_fq_codel nfsd auth_rpcgss nfs_acl lockd grace sunrpc parport_pc ppdev lp parport autofs4 drbg ansi_cprng algif_skcipher af_alg dm_crypt hid_thingm hid_generic hid_logitech_hidpp hid_logitech_dj usbhid hid rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd nouveau i915 psmouse ahci libahci mxm_wmi ttm rtsx_pci i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt fb_sys_fops drm ptp pps_core wmi fjes video
  Apr 29 08:33:05 zfp kernel: [34730.861171] CPU: 1 PID: 1523 Comm: Xorg Tainted: G           OE   4.4.0-21-generic #37-Ubuntu
  Apr 29 08:33:05 zfp kernel: [34730.861203] Hardware name: LENOVO 20AN006LUS/20AN006LUS, BIOS GLET77WW (2.31 ) 01/27/2015
  Apr 29 08:33:05 zfp kernel: [34730.861233] task: ffff8800a92b1b80 ti: ffff880428664000 task.ti: ffff880428664000
  Apr 29 08:33:05 zfp kernel: [34730.861261] RIP: 0010:[<ffffffffc01221cb>]  [<ffffffffc01221cb>] drm_dp_payload_send_msg+0x15b/0x210 [drm_kms_helper]
  Apr 29 08:33:05 zfp kernel: [34730.861308] RSP: 0018:ffff880428667ad8  EFLAGS: 00010282
  Apr 29 08:33:05 zfp kernel: [34730.861328] RAX: ffff8800a92b1b80 RBX: 0a26771717294f2d RCX: ffff880425e1d908
  Apr 29 08:33:05 zfp kernel: [34730.861354] RDX: 0000000080000000 RSI: 0a26771717294f2d RDI: ffff880425e1d908
  Apr 29 08:33:05 zfp kernel: [34730.861380] RBP: ffff880428667b28 R08: 000000000001a040 R09: ffffffffc012216b
  Apr 29 08:33:05 zfp kernel: [34730.861406] R10: ffffea000211bc00 R11: 0000000000000000 R12: ffff88042bf57810
  Apr 29 08:33:05 zfp kernel: [34730.861432] R13: ffff880425e1d650 R14: ffff880425e1d650 R15: ffff8804249e1800
  Apr 29 08:33:05 zfp kernel: [34730.861458] FS:  00007feb611c4a00(0000) GS:ffff88043e240000(0000) knlGS:0000000000000000
  Apr 29 08:33:05 zfp kernel: [34730.861488] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Apr 29 08:33:05 zfp kernel: [34730.861509] CR2: 000055f2ae2e4b30 CR3: 00000004279e9000 CR4: 00000000001406e0
  Apr 29 08:33:05 zfp kernel: [34730.861534] Stack:
  Apr 29 08:33:05 zfp kernel: [34730.861543]  587ca201012a25ee ffff880425e1d908 ffff880428667b00 0000000000000001
  Apr 29 08:33:05 zfp kernel: [34730.861574]  000000003e400d66 0000000000000001 ffff88042bf57810 ffff880425e1d650
  Apr 29 08:33:05 zfp kernel: [34730.861605]  0000000000000001 ffff880425e1d9a0 ffff880428667b68 ffffffffc01227f2
  Apr 29 08:33:05 zfp kernel: [34730.861636] Call Trace:
  Apr 29 08:33:05 zfp kernel: [34730.861651]  [<ffffffffc01227f2>] drm_dp_update_payload_part2+0xc2/0x130 [drm_kms_helper]
  Apr 29 08:33:05 zfp kernel: [34730.861700]  [<ffffffffc0278cf7>] intel_mst_enable_dp+0xe7/0x110 [i915]
  Apr 29 08:33:05 zfp kernel: [34730.861739]  [<ffffffffc025bcd1>] haswell_crtc_enable+0x421/0x870 [i915]
  Apr 29 08:33:05 zfp kernel: [34730.861779]  [<ffffffffc02648d2>] ? intel_frontbuffer_flush+0x42/0x80 [i915]
  Apr 29 08:33:05 zfp kernel: [34730.861819]  [<ffffffffc0258b64>] intel_atomic_commit+0x454/0x6f0 [i915]
  Apr 29 08:33:05 zfp kernel: [34730.861857]  [<ffffffffc0064c47>] drm_atomic_commit+0x37/0x60 [drm]
  Apr 29 08:33:05 zfp kernel: [34730.861884]  [<ffffffffc0126a06>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
  Apr 29 08:33:05 zfp kernel: [34730.861922]  [<ffffffffc0053e02>] drm_mode_set_config_internal+0x62/0x100 [drm]
  Apr 29 08:33:05 zfp kernel: [34730.861958]  [<ffffffffc0058322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
  Apr 29 08:33:05 zfp kernel: [34730.861988]  [<ffffffffc0049712>] drm_ioctl+0x152/0x540 [drm]
  Apr 29 08:33:05 zfp kernel: [34730.862017]  [<ffffffffc0057f50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
  Apr 29 08:33:05 zfp kernel: [34730.862044]  [<ffffffff812200ff>] do_vfs_ioctl+0x29f/0x490
  Apr 29 08:33:05 zfp kernel: [34730.862066]  [<ffffffff8108e081>] ? __set_task_blocked+0x41/0xa0
  Apr 29 08:33:05 zfp kernel: [34730.862087]  [<ffffffff81090a16>] ? __set_current_blocked+0x36/0x60
  Apr 29 08:33:05 zfp kernel: [34730.862110]  [<ffffffff81220369>] SyS_ioctl+0x79/0x90
  Apr 29 08:33:05 zfp kernel: [34730.862130]  [<ffffffff81090cce>] ? SyS_rt_sigprocmask+0x8e/0xc0
  Apr 29 08:33:05 zfp kernel: [34730.862154]  [<ffffffff818244f2>] entry_SYSCALL_64_fastpath+0x16/0x71
  Apr 29 08:33:05 zfp kernel: [34730.862178] Code: e0 eb d1 49 8d 8e b8 02 00 00 49 8b 9f 30 04 00 00 48 89 cf 48 89 4d b8 e8 93 01 70 c1 49 83 be e8 02 00 00 00 48 8b 4d b8 74 6f <4c> 8b 63 28 4d 85 e4 74 66 49 3b 5c 24 20 74 46 49 8b 9c 24 30 
  Apr 29 08:33:05 zfp kernel: [34730.862314] RIP  [<ffffffffc01221cb>] drm_dp_payload_send_msg+0x15b/0x210 [drm_kms_helper]
  Apr 29 08:33:05 zfp kernel: [34730.862349]  RSP <ffff880428667ad8>
  Apr 29 08:33:05 zfp kernel: [34730.873457] ---[ end trace fe5e1f4d8234b524 ]---

  And yesterday:

  Apr 28 09:49:13 zfp kernel: [10746.972447] general protection fault: 0000 [#1] SMP 
  Apr 28 09:49:13 zfp kernel: [10746.972479] Modules linked in: ctr ccm xt_nat xt_tcpudp pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfcomm veth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay xt_multiport iptable_filter ip_tables x_tables bnep arc4 intel_rapl uvcvideo x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_usb_audio videobuf2_core kvm_intel v4l2_common videodev snd_usbmidi_lib kvm btusb media btrtl btbcm irqbypass btintel bluetooth input_leds joydev serio_raw iwlmvm snd_hda_codec_hdmi mac80211 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_hda_codec_realtek snd_hda_codec_generic thinkpad_acpi snd_seq iwlwifi snd_hda_intel nvram snd_hda_codec cfg80211 snd_hda_core snd_hwdep rtsx_pci_ms lpc_ich snd_pcm memstick mei_me snd_seq_device mei snd_timer snd soundcore shpchp ie31200_edac edac_core mac_hid sch_fq_codel nfsd auth_rpcgss nfs_acl lockd parport_pc grace sunrpc ppdev lp parport autofs4 drbg ansi_cprng algif_skcipher af_alg dm_crypt hid_thingm hid_generic hid_logitech_hidpp hid_logitech_dj usbhid hid rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul nouveau aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse mxm_wmi ttm i2c_algo_bit drm_kms_helper syscopyarea ahci sysfillrect sysimgblt libahci fb_sys_fops e1000e drm rtsx_pci ptp pps_core wmi fjes video
  Apr 28 09:49:13 zfp kernel: [10746.973274] CPU: 1 PID: 1525 Comm: Xorg Tainted: G           OE   4.4.0-21-generic #37-Ubuntu
  Apr 28 09:49:13 zfp kernel: [10746.973306] Hardware name: LENOVO 20AN006LUS/20AN006LUS, BIOS GLET77WW (2.31 ) 01/27/2015
  Apr 28 09:49:13 zfp kernel: [10746.973337] task: ffff880427583700 ti: ffff880422a98000 task.ti: ffff880422a98000
  Apr 28 09:49:13 zfp kernel: [10746.973364] RIP: 0010:[<ffffffffc01131cb>]  [<ffffffffc01131cb>] drm_dp_payload_send_msg+0x15b/0x210 [drm_kms_helper]
  Apr 28 09:49:13 zfp kernel: [10746.973411] RSP: 0018:ffff880422a9bad8  EFLAGS: 00010286
  Apr 28 09:49:13 zfp kernel: [10746.973431] RAX: ffff880427583700 RBX: 61642a0a2222203a RCX: ffff880425aaa908
  Apr 28 09:49:13 zfp kernel: [10746.973457] RDX: 0000000080000000 RSI: 61642a0a2222203a RDI: ffff880425aaa908
  Apr 28 09:49:13 zfp kernel: [10746.973483] RBP: ffff880422a9bb28 R08: 000000000001a040 R09: ffffffffc011316b
  Apr 28 09:49:13 zfp kernel: [10746.973509] R10: ffffea000cefd600 R11: 0000000000000000 R12: ffff8800356e0d10
  Apr 28 09:49:13 zfp kernel: [10746.973535] R13: ffff880425aaa650 R14: ffff880425aaa650 R15: ffff8804252ef800
  Apr 28 09:49:13 zfp kernel: [10746.973562] FS:  00007f3b44ea0a00(0000) GS:ffff88043e240000(0000) knlGS:0000000000000000
  Apr 28 09:49:13 zfp kernel: [10746.973591] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Apr 28 09:49:13 zfp kernel: [10746.973612] CR2: 00007f1aef9db624 CR3: 0000000425d9e000 CR4: 00000000001406e0
  Apr 28 09:49:13 zfp kernel: [10746.973638] Stack:
  Apr 28 09:49:13 zfp kernel: [10746.973646]  6172542e616c736e ffff880425aaa908 ffff880422a9bb00 0000000000000001
  Apr 28 09:49:13 zfp kernel: [10746.973677]  000000008a528246 0000000000000001 ffff8800356e0d10 ffff880425aaa650
  Apr 28 09:49:13 zfp kernel: [10746.973708]  0000000000000001 ffff880425aaa9a0 ffff880422a9bb68 ffffffffc01137f2
  Apr 28 09:49:13 zfp kernel: [10746.973740] Call Trace:
  Apr 28 09:49:13 zfp kernel: [10746.973754]  [<ffffffffc01137f2>] drm_dp_update_payload_part2+0xc2/0x130 [drm_kms_helper]
  Apr 28 09:49:13 zfp kernel: [10746.973809]  [<ffffffffc02accf7>] intel_mst_enable_dp+0xe7/0x110 [i915]
  Apr 28 09:49:13 zfp kernel: [10746.973849]  [<ffffffffc028fcd1>] haswell_crtc_enable+0x421/0x870 [i915]
  Apr 28 09:49:13 zfp kernel: [10746.973889]  [<ffffffffc02988d2>] ? intel_frontbuffer_flush+0x42/0x80 [i915]
  Apr 28 09:49:13 zfp kernel: [10746.973929]  [<ffffffffc028cb64>] intel_atomic_commit+0x454/0x6f0 [i915]
  Apr 28 09:49:13 zfp kernel: [10746.973965]  [<ffffffffc0072c47>] drm_atomic_commit+0x37/0x60 [drm]
  Apr 28 09:49:13 zfp kernel: [10746.973993]  [<ffffffffc0117a06>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
  Apr 28 09:49:13 zfp kernel: [10746.974031]  [<ffffffffc0061e02>] drm_mode_set_config_internal+0x62/0x100 [drm]
  Apr 28 09:49:13 zfp kernel: [10746.974066]  [<ffffffffc0066322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
  Apr 28 09:49:13 zfp kernel: [10746.974096]  [<ffffffffc0057712>] drm_ioctl+0x152/0x540 [drm]
  Apr 28 09:49:13 zfp kernel: [10746.974125]  [<ffffffffc0065f50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
  Apr 28 09:49:13 zfp kernel: [10746.974152]  [<ffffffff812200ff>] do_vfs_ioctl+0x29f/0x490
  Apr 28 09:49:13 zfp kernel: [10746.974174]  [<ffffffff8108e081>] ? __set_task_blocked+0x41/0xa0
  Apr 28 09:49:13 zfp kernel: [10746.974197]  [<ffffffff81090a16>] ? __set_current_blocked+0x36/0x60
  Apr 28 09:49:13 zfp kernel: [10746.974220]  [<ffffffff81220369>] SyS_ioctl+0x79/0x90
  Apr 28 09:49:13 zfp kernel: [10746.974240]  [<ffffffff81090cce>] ? SyS_rt_sigprocmask+0x8e/0xc0
  Apr 28 09:49:13 zfp kernel: [10746.974264]  [<ffffffff818244f2>] entry_SYSCALL_64_fastpath+0x16/0x71
  Apr 28 09:49:13 zfp kernel: [10746.974287] Code: e0 eb d1 49 8d 8e b8 02 00 00 49 8b 9f 30 04 00 00 48 89 cf 48 89 4d b8 e8 93 f1 70 c1 49 83 be e8 02 00 00 00 48 8b 4d b8 74 6f <4c> 8b 63 28 4d 85 e4 74 66 49 3b 5c 24 20 74 46 49 8b 9c 24 30 
  Apr 28 09:49:13 zfp kernel: [10746.974423] RIP  [<ffffffffc01131cb>] drm_dp_payload_send_msg+0x15b/0x210 [drm_kms_helper]
  Apr 28 09:49:13 zfp kernel: [10746.974458]  RSP <ffff880422a9bad8>
  Apr 28 09:49:13 zfp kernel: [10746.983852] ---[ end trace c06b1063bbf77920 ]---

  
  The above happens when I run my "dock" script:

  #!/bin/dash
  xrandr --output DP2-1  --left-of eDP1 --off  \
         --output DP2-2 --right-of eDP1 --off
  xrandr --output DP2-1 --right-of eDP1 --auto
  xrandr --output DP2-2 --left-of  eDP1 --auto

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Fri Apr 29 08:42:30 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=729dd129-ad72-4d34-87d2-b698d6f581ae
  InstallationDate: Installed on 2015-06-16 (317 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 20AN006LUS
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-21-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-24 (4 days ago)
  dmi.bios.date: 01/27/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GLET77WW (2.31 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AN006LUS
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98401 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGLET77WW(2.31):bd01/27/2015:svnLENOVO:pn20AN006LUS:pvrThinkPadT440p:rvnLENOVO:rn20AN006LUS:rvr0B98401WIN:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AN006LUS
  dmi.product.version: ThinkPad T440p
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1576764/+subscriptions
References

[Bug 1576764] [NEW] Kernel bug caused by XRandR / Video Drivers
From: frew, 2016-04-29