X/video stream freezes once a while

[Pekka Ahtonen]

System: T400s with external Dell Ultrasharp 25" monitor in DisplayPort.

When I boot ONLY the laptop dmesg output is clean, but once I connect the external monitor I will get the following. The same call trace appear also occasionally, when video streams freeze totally while the audio is playing.

This might be related to earlier similar problems, but didn't find exactly same, so reporting a new bug.

[ 554.268928] [drm:pipe_config_err [i915]] *ERROR* mismatch in has_audio (expected 1, found 0)
[ 554.268933] pipe state doesn't match!
[ 554.268989] ------------[ cut here ]------------
[ 554.269022] WARNING: CPU: 1 PID: 1442 at /build/linux-hwe-k3LMOX/linux-hwe-4.13.0/drivers/gpu/drm/i915/intel_display.c:12277 intel_atomic_commit_tail+0xdc5/0x10b0 [i915]
[ 554.269023] Modules linked in: hid_generic usbhid hid snd_usb_audio snd_usbmidi_lib ccm msr bnep uvcvideo btusb btrtl btbcm btintel bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ecdh_generic videobuf2_core videodev media coretemp kvm_intel kvm irqbypass input_leds joydev serio_raw arc4 wmi_bmof iwldvm mac80211 iwlwifi cfg80211 thinkpad_acpi lpc_ich snd_hda_codec_conexant snd_hda_codec_generic nvram snd_hda_intel snd_seq_midi snd_seq_midi_event snd_hda_codec snd_hda_core snd_hwdep shpchp snd_pcm snd_rawmidi snd_seq snd_seq_device snd_timer snd mei_me soundcore mei mac_hid ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
[ 554.269064] ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c iptable_filter parport_pc ip_tables ppdev x_tables lp parport autofs4 crypto_simd glue_helper cryptd aes_x86_64 algif_skcipher af_alg dm_crypt i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt ahci libahci fb_sys_fops drm e1000e psmouse ptp pps_core wmi video
[ 554.269088] CPU: 1 PID: 1442 Comm: Xorg Not tainted 4.13.0-38-generic #43~16.04.1-Ubuntu
[ 554.269089] Hardware name: LENOVO 28239KG/28239KG, BIOS 6HET37WW (1.22 ) 10/24/2012
[ 554.269090] task: ffff882ded679640 task.stack: ffffb44d41208000
[ 554.269122] RIP: 0010:intel_atomic_commit_tail+0xdc5/0x10b0 [i915]
[ 554.269123] RSP: 0018:ffffb44d4120ba88 EFLAGS: 00010282
[ 554.269125] RAX: 0000000000000019 RBX: ffff882de7418308 RCX: 0000000000000006
[ 554.269126] RDX: 0000000000000000 RSI: 0000000000000082 RDI: ffff882dfbc96570
[ 554.269126] RBP: ffffb44d4120bb40 R08: 0000000000000001 R09: 0000000000000469
[ 554.269127] R10: ffff882de7418000 R11: 0000000000000469 R12: ffff882de7fd2000
[ 554.269128] R13: ffff882d4add6800 R14: ffff882de7418310 R15: ffff882d4add1800
[ 554.269130] FS: 00007fb0e6d45a00(0000) GS:ffff882dfbc80000(0000) knlGS:0000000000000000
[ 554.269131] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 554.269132] CR2: 00007f4a7eed5624 CR3: 00000002302ea000 CR4: 00000000000406e0
[ 554.269133] Call Trace:
[ 554.269140] ? wait_woken+0x80/0x80
[ 554.269172] intel_atomic_commit+0x413/0x4b0 [i915]
[ 554.269203] ? drm_atomic_check_only+0x3e0/0x580 [drm]
[ 554.269219] ? handle_conflicting_encoders+0x28e/0x2a0 [drm_kms_helper]
[ 554.269232] drm_atomic_commit+0x51/0x60 [drm]
[ 554.269238] drm_atomic_helper_set_config+0x63/0xa0 [drm_kms_helper]
[ 554.269250] __drm_mode_set_config_internal+0x6b/0x120 [drm]
[ 554.269261] drm_mode_setcrtc+0x4f6/0x640 [drm]
[ 554.269273] ? drm_mode_getcrtc+0x180/0x180 [drm]
[ 554.269283] drm_ioctl_kernel+0x6b/0xb0 [drm]
[ 554.269293] drm_ioctl+0x3e4/0x450 [drm]
[ 554.269304] ? drm_mode_getcrtc+0x180/0x180 [drm]
[ 554.269308] do_vfs_ioctl+0xa4/0x600
[ 554.269311] ? entry_SYSCALL_64_after_hwframe+0xe9/0x139
[ 554.269313] ? entry_SYSCALL_64_after_hwframe+0xe2/0x139
[ 554.269314] ? entry_SYSCALL_64_after_hwframe+0xdb/0x139
[ 554.269316] ? entry_SYSCALL_64_after_hwframe+0xd4/0x139
[ 554.269318] ? entry_SYSCALL_64_after_hwframe+0xcd/0x139
[ 554.269320] ? entry_SYSCALL_64_after_hwframe+0xc6/0x139
[ 554.269321] ? entry_SYSCALL_64_after_hwframe+0xbf/0x139
[ 554.269323] ? entry_SYSCALL_64_after_hwframe+0xb8/0x139
[ 554.269324] ? entry_SYSCALL_64_after_hwframe+0xb1/0x139
[ 554.269326] SyS_ioctl+0x79/0x90
[ 554.269328] ? entry_SYSCALL_64_after_hwframe+0x72/0x139
[ 554.269330] entry_SYSCALL_64_fastpath+0x24/0xab
[ 554.269331] RIP: 0033:0x7fb0e4ba5f47
[ 554.269332] RSP: 002b:00007ffe67b15a78 EFLAGS: 00003246 ORIG_RAX: 0000000000000010
[ 554.269334] RAX: ffffffffffffffda RBX: 0000560ab18df210 RCX: 00007fb0e4ba5f47
[ 554.269335] RDX: 00007ffe67b15b70 RSI: 00000000c06864a2 RDI: 000000000000000a
[ 554.269336] RBP: 0000560ab18d73d0 R08: 0000000000000007 R09: 000000000003af5c
[ 554.269337] R10: 0000560ab168ae70 R11: 0000000000003246 R12: 0000560ab190ab30
[ 554.269337] R13: 0000560ab0c9ed74 R14: 0000000000000001 R15: 0000000000000000
[ 554.269339] Code: b6 d0 0f b6 f1 48 c7 c7 48 08 6a c0 e8 16 88 d1 d2 0f ff 4c 8b 95 50 ff ff ff e9 47 f8 ff ff 48 c7 c7 a0 bf 68 c0 e8 fc 87 d1 d2 <0f> ff e9 dd f8 ff ff 80 3d 2f 8a 0f 00 00 0f 85 23 02 00 00 48
[ 554.269370] ---[ end trace 16cd181a238f3838 ]---

Ubuntu release:
root:~# lsb_release -rd
Description: Ubuntu 16.04.4 LTS
Release: 16.04