Hi, retried with the kernel-parameter softlockup_panic=1 , to get a stack-strace. For me, the stacktrace seems to point to the sound-driver:
[ 180.226284] NMI watchdog: Watchdog detected hard LOCKUP on cpu 1^AdModules linked in:^Ac ccm^Ac rfcomm^Ac vmw_vsock_vmci_transport^Ac vsock^Ac vmw_vmci^Ac bnep^Ac acer_wmi^Ac sparse_keymap^A c snd_hda_codec_hdmi^Ac intel_rapl^Ac x86_pkg_temp_thermal^Ac intel_powerclamp^Ac coretemp^Ac kvm_intel^Ac kvm^Ac irqbypass^Ac crct10dif_pclmul^Ac crc32_pclmul^Ac ghash_clmulni_intel^Ac aesni_i ntel^Ac aes_x86_64^Ac lrw^Ac glue_helper^Ac ablk_helper^Ac cryptd^Ac intel_cstate^Ac arc4^Ac uvcvideo^Ac intel_rapl_perf^Ac videobuf2_vmalloc^Ac videobuf2_memops^Ac videobuf2_v4l2^Ac videobuf2_ core^Ac ath9k^Ac snd_hda_codec_realtek^Ac snd_hda_codec_generic^Ac joydev^Ac input_leds^Ac ath9k_common^Ac snd_seq_midi^Ac ath9k_hw^Ac snd_seq_midi_event^Ac snd_hda_intel^Ac videodev^Ac serio_r aw^Ac snd_hda_codec^Ac ath3k^Ac ath^Ac snd_hda_core^Ac btusb^Ac snd_hwdep^Ac snd_rawmidi^Ac btrtl^Ac mac80211^Ac snd_pcm^Ac btbcm^Ac media^Ac btintel^Ac rtsx_pci_ms^Ac bluetooth^Ac cfg80211^Ac snd_seq^Ac snd_seq_device^Ac memstick^Ac lpc_ich^Ac snd_timer^Ac snd^Ac soundcore^Ac mei_me^Ac mei^Ac shpchp^Ac [ 180.238400] CPU: 1 PID: 3175 Comm: alsa-sink-HDMI Not tainted 4.9.0-040900rc8-generic #201612051443 [ 180.240530] Hardware name: Acer TravelMate 8481TG/BA41_HS, BIOS V1.16 11/28/2012 [ 180.242699] ffff8be0ffa45b50^Ac ffffffffac2177d2^Ac 0000000000000000^Ac 0000000000000000^Ac [ 180.244882] ffff8be0ffa45b68^Ac ffffffffabf46df6^Ac ffff8be0f5edc000^Ac ffff8be0ffa45ba0^Ac [ 180.247056] ffffffffabf8fd23^Ac 0000000000000001^Ac ffff8be0ffa4a400^Ac ffff8be0f5edc000^Ac [ 180.249166] Call Trace: [ 180.251194] <NMI> [<ffffffffac2177d2>] dump_stack+0x63/0x81 [ 180.253168] [<ffffffffabf46df6>] watchdog_overflow_callback+0xb6/0xe0 [ 180.255016] [<ffffffffabf8fd23>] __perf_event_overflow+0x83/0x1b0 [ 180.256898] [<ffffffffabf9bb14>] perf_event_overflow+0x14/0x20 [ 180.258775] [<ffffffffabe0c7c5>] intel_pmu_handle_irq+0x1d5/0x490 [ 180.260641] [<ffffffffabe058cc>] perf_event_nmi_handler+0x2c/0x50 [ 180.262476] [<ffffffffabe313ea>] nmi_handle+0x6a/0x120 [ 180.264273] [<ffffffffabe31973>] default_do_nmi+0x53/0x110 [ 180.266057] [<ffffffffabe31b49>] do_nmi+0x119/0x180 [ 180.267837] [<ffffffffac68ef01>] end_repeat_nmi+0x1a/0x1e [ 180.269588] [<ffffffffabed13c9>] ? native_queued_spin_lock_slowpath+0x179/0x1a0 [ 180.271304] [<ffffffffabed13c9>] ? native_queued_spin_lock_slowpath+0x179/0x1a0 [ 180.273036] [<ffffffffabed13c9>] ? native_queued_spin_lock_slowpath+0x179/0x1a0 [ 180.274753] <EOE> [<ffffffffac68d680>] _raw_spin_lock+0x20/0x30 [ 180.276479] [<ffffffffc0a9d911>] azx_pcm_trigger+0x171/0x280 [snd_hda_codec] [ 180.278231] [<ffffffffc086f69e>] snd_pcm_do_stop+0x3e/0x50 [snd_pcm] [ 180.279982] [<ffffffffc086f47f>] snd_pcm_action_single+0x2f/0x70 [snd_pcm] [ 180.281737] [<ffffffffc086f633>] snd_pcm_action+0x103/0x110 [snd_pcm] [ 180.283487] [<ffffffffc08703c1>] snd_pcm_drop+0x61/0x90 [snd_pcm] [ 180.285238] [<ffffffffc087276f>] snd_pcm_common_ioctl1+0x7cf/0xc90 [snd_pcm] [ 180.286912] [<ffffffffac086487>] ? eventfd_ctx_read+0x67/0x210 [ 180.288619] [<ffffffffabeb0cb0>] ? wake_up_q+0x80/0x80 [ 180.290312] [<ffffffffc0872d69>] snd_pcm_playback_ioctl1+0x139/0x260 [snd_pcm] [ 180.292008] [<ffffffffc0872eb7>] snd_pcm_playback_ioctl+0x27/0x40 [snd_pcm] [ 180.293682] [<ffffffffac04bc23>] do_vfs_ioctl+0xa3/0x600 [ 180.295356] [<ffffffffac03715b>] ? vfs_read+0x11b/0x130 [ 180.297019] [<ffffffffac04c1f9>] SyS_ioctl+0x79/0x90 [ 180.298679] [<ffffffffac68d7bb>] entry_SYSCALL_64_fastpath+0x1e/0xad (full log is attached ** Attachment added: "netconsole-mainline5.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1647048/+attachment/4788854/+files/netconsole-mainline5.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1647048 Title: System freezes after login (NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1647048/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
