Seems same kind of bug for me Many lines with nouveau on kern.log Like following line : Apr 23 07:36:00 Inspiron-3650 kernel: [33231.550130] nouveau 0000:01:00.0: gr: TRAP ch 2 [007fb31000 Xorg[1456]] Seems this bug is back --> refer to following bug Bug #1474538 reported by Olivier Diotte on 2015-07-14 nouveau driver fills syslog when running xscreensaver (molecule) with kern.log filling this bug also crashes system : keyboard no longer responding, or mouse+keyboard dead... Only workarround is to turn off computer. Seems computer crashed exaclty here on the trace Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978200] ------------[ cut here ]------------ Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978208] kernel BUG at /build/linux-2NWldV/linux-4.10.0/mm/usercopy.c:75! Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978213] invalid opcode: 0000 [#1] SMP Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978216] Modules linked in: rfcomm ccm bnep binfmt_misc dm_crypt nls_iso8859_1 dell_wmi sparse_keymap dell_smbios dcdbas dell_smm_hwmon intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ip6t_REJECT nf_reject_ipv6 snd_hda_codec_realtek snd_hda_codec_hdmi nf_log_ipv6 snd_hda_codec_generic kvm irqbypass crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_codec pcbc aesni_intel joydev aes_x86_64 input_leds crypto_simd rtsx_usb_ms memstick ath3k glue_helper usblp snd_hda_core snd_hwdep cryptd snd_pcm btusb intel_cstate snd_seq_midi snd_seq_midi_event snd_rawmidi arc4 snd_seq ath9k ath9k_common ath9k_hw ath btrtl snd_seq_device snd_timer snd intel_rapl_perf mac80211 cfg80211 soundcore mei_me mei intel_pch_thermal shpchp serio_raw hci_uart btbcm btqca btintel intel_lpss_acpi Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978262] acpi_als intel_lpss mac_hid bluetooth tpm_crb acpi_pad kfifo_buf industrialio 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 parport_pc ppdev lp parport ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat libcrc32c nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables autofs4 uas hid_generic usbhid rtsx_usb_sdmmc rtsx_usb usb_storage nouveau mxm_wmi i2c_algo_bit ttm psmouse drm_kms_helper syscopyarea sysfillrect r8169 sysimgblt fb_sys_fops mii ahci drm libahci wmi video i2c_hid pinctrl_sunrisepoint hid pinctrl_intel fjes Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978304] CPU: 1 PID: 1323 Comm: Xorg Tainted: G W 4.10.0-20-generic #22-Ubuntu Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978309] Hardware name: Dell Inc. Inspiron 3650/0C2XKD, BIOS 3.3.6 09/30/2016 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978316] task: ffff951b58e29700 task.stack: ffffa70b41bfc000 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978322] RIP: 0010:__check_object_size+0x77/0x1d7 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978326] RSP: 0018:ffffa70b41bffbf0 EFLAGS: 00010286 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978329] RAX: 0000000000000060 RBX: ffff951b1de7b0be RCX: 0000000000000000 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978333] RDX: 0000000000000000 RSI: ffff951b6648dc88 RDI: ffff951b6648dc88 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978337] RBP: ffffa70b41bffc10 R08: 00000000000eed00 R09: 0000000000000459 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978341] R10: 00000000000000c0 R11: ffffffffa4c4882d R12: 00000000000000a0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978345] R13: 0000000000000000 R14: ffff951b1de7b15e R15: ffff951b1de7b0be Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978349] FS: 00007ff9a9767a40(0000) GS:ffff951b66480000(0000) knlGS:0000000000000000 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978353] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978357] CR2: 00007ff999cc1000 CR3: 0000000258721000 CR4: 00000000003406e0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978360] Call Trace: Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978397] nouveau_gem_ioctl_pushbuf+0x1eb/0x1610 [nouveau] Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978403] ? insert_pfn.isra.66+0x38/0xf0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978408] ? vm_insert_mixed+0x64/0x90 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978412] ? __check_object_size+0x100/0x1d7 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978426] drm_ioctl+0x21b/0x4c0 [drm] Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978455] ? nouveau_gem_ioctl_new+0x150/0x150 [nouveau] Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978460] ? __do_fault+0x21/0xd0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978489] nouveau_drm_ioctl+0x74/0xc0 [nouveau] Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978493] do_vfs_ioctl+0xa3/0x610 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978498] ? __do_page_fault+0x266/0x4e0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978502] SyS_ioctl+0x79/0x90 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978507] entry_SYSCALL_64_fastpath+0x1e/0xad Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978510] RIP: 0033:0x7ff9a716e987 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978513] RSP: 002b:00007ffee2d5c6b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978517] RAX: ffffffffffffffda RBX: 0000000000000e58 RCX: 00007ff9a716e987 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978521] RDX: 00007ffee2d5c720 RSI: 00000000c0406481 RDI: 000000000000000e Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978525] RBP: 0000000000000064 R08: 0000000000000000 R09: 0000000000000396 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978528] R10: 000055e937178470 R11: 0000000000000246 R12: 0000000000000064 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978532] R13: 0000000000000000 R14: 0000000000059a60 R15: 0000000000000e58 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978536] Code: 48 0f 44 d1 48 c7 c6 16 12 6a a4 48 c7 c1 35 62 69 a4 48 0f 44 f1 4d 89 e1 49 89 c0 48 89 d9 48 c7 c7 48 dc 69 a4 e8 d8 d8 f6 ff <0f> 0b e8 12 c3 fb ff 85 c0 75 73 48 89 df e8 e6 42 e3 ff 84 c0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.978568] RIP: __check_object_size+0x77/0x1d7 RSP: ffffa70b41bffbf0 Apr 24 20:26:38 Inspiron-3650 kernel: [ 1440.983424] ---[ end trace 44f8662b18b8001e ]--- After this log i can seen firewall traces that shows the computer is not dead (only input devices ??)