Apr 22 11:41:43 t450s unity-panel-ser[8805]: menus_destroyed: assertion 'IS_WINDOW_MENU(wm)' failed
Apr 22 11:41:43 t450s hud-service[9020]: QCoreApplication::postEvent: Unexpected null receiver
Apr 22 11:41:43 t450s hud-service[9020]: #033[31mvoid DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: "Keine derartige Schnittstelle »com.canonical.dbusmenu« des Objekts im Pfad /org/ayatana/bamf/window/67108872"
Apr 22 11:41:44 t450s hud-service[9020]: QCoreApplication::postEvent: Unexpected null receiver
Apr 22 11:41:45 t450s hud-service[9020]: #033[31mvoid DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: "Keine derartige Schnittstelle »com.canonical.dbusmenu« des Objekts im Pfad /org/ayatana/bamf/window/67109125"
Apr 22 11:41:58 t450s hud-service[9020]: #033[31mvoid DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: "Keine derartige Schnittstelle »com.canonical.dbusmenu« des Objekts im Pfad /org/ayatana/bamf/window/67109296"
Apr 22 11:42:01 t450s zeitgeist-daemon[9366]: #033[31m[09:42:01.461468 WARNING]#033[0m zeitgeist-daemon.vala:127: Unable to parse version info!
Apr 22 11:42:35 t450s hud-service[9020]: #033[31mvoid DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: "Keine derartige Schnittstelle »com.canonical.dbusmenu« des Objekts im Pfad /org/ayatana/bamf/window/69206017"
Apr 22 11:42:51 t450s unity-panel-ser[8805]: window_menu_model_new: assertion 'BAMF_IS_APPLICATION(app)' failed
Apr 22 11:42:51 t450s unity-panel-ser[8805]: track_menus: assertion 'IS_WINDOW_MENU(menus)' failed
Apr 22 11:43:01 t450s kernel: [14602.461362] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
Apr 22 11:43:01 t450s kernel: [14602.461430] IP: gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915]
Apr 22 11:43:01 t450s kernel: [14602.461460] PGD 0 
Apr 22 11:43:01 t450s kernel: [14602.461461] 
Apr 22 11:43:01 t450s kernel: [14602.461479] Oops: 0002 [#1] SMP
Apr 22 11:43:01 t450s kernel: [14602.461494] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep dm_crypt uvcvideo btusb btrtl btbcm btintel bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev cdc_mbim cdc_wdm cdc_ncm media usbnet cdc_acm intel_rapl mii x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul arc4 crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd iwlmvm intel_cstate intel_rapl_perf mac80211 joydev input_leds serio_raw snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic intel_pch_thermal iwlwifi snd_hda_intel snd_hda_codec lpc_ich snd_hda_core thinkpad_acpi snd_hwdep nvram cfg80211 rtsx_pci_ms memstick snd_seq_midi snd_pcm snd_seq_midi_event snd_rawmidi shpchp mei_me
Apr 22 11:43:01 t450s kernel: [14602.461791]  mei snd_seq snd_seq_device snd_timer snd soundcore mac_hid binfmt_misc parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid rtsx_pci_sdmmc i915 nouveau mxm_wmi ttm i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect rtsx_pci sysimgblt fb_sys_fops e1000e ahci drm libahci ptp pps_core wmi fjes video
Apr 22 11:43:01 t450s kernel: [14602.461927] CPU: 2 PID: 16086 Comm: chromium-browse Tainted: G           OE   4.10.0-19-generic #21-Ubuntu
Apr 22 11:43:01 t450s kernel: [14602.461966] Hardware name: LENOVO 20BWS2KM00/20BWS2KM00, BIOS JBET51WW (1.16 ) 07/08/2015
Apr 22 11:43:01 t450s kernel: [14602.462001] task: ffff8e32cce30000 task.stack: ffff9b8888630000
Apr 22 11:43:01 t450s kernel: [14602.462044] RIP: 0010:gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462077] RSP: 0018:ffff9b8888633880 EFLAGS: 00010246
Apr 22 11:43:01 t450s kernel: [14602.462100] RAX: ffff8e33af3f5900 RBX: 0000000000000003 RCX: 0000000000000003
Apr 22 11:43:01 t450s kernel: [14602.462129] RDX: 0000000000000000 RSI: ffff8e3319870000 RDI: ffff8e33f6220000
Apr 22 11:43:01 t450s kernel: [14602.462158] RBP: ffff9b88886338d8 R08: 0000000000000000 R09: 0000000000000000
Apr 22 11:43:01 t450s kernel: [14602.462187] R10: 0000000000000000 R11: 0000000000000040 R12: ffff8e3236870000
Apr 22 11:43:01 t450s kernel: [14602.462217] R13: ffff8e32f61f7df0 R14: 00000000ffff6000 R15: 0000000000001000
Apr 22 11:43:01 t450s kernel: [14602.462247] FS:  00007f309f912ac0(0000) GS:ffff8e340dc80000(0000) knlGS:0000000000000000
Apr 22 11:43:01 t450s kernel: [14602.462280] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 22 11:43:01 t450s kernel: [14602.462306] CR2: 0000000000000018 CR3: 000000020cce1000 CR4: 00000000003406e0
Apr 22 11:43:01 t450s kernel: [14602.462335] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 22 11:43:01 t450s kernel: [14602.462364] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 22 11:43:01 t450s kernel: [14602.462395] Call Trace:
Apr 22 11:43:01 t450s kernel: [14602.462425]  gen8_alloc_va_range_3lvl+0xfb/0x9e0 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462450]  ? swiotlb_map_sg_attrs+0x49/0x110
Apr 22 11:43:01 t450s kernel: [14602.462486]  gen8_alloc_va_range+0x23d/0x470 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462527]  i915_vma_bind+0x7e/0x170 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462563]  __i915_vma_do_pin+0x2a5/0x450 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462600]  i915_gem_execbuffer_reserve_vma.isra.31+0x144/0x1b0 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462644]  i915_gem_execbuffer_reserve.isra.32+0x39e/0x3d0 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462686]  i915_gem_do_execbuffer.isra.38+0x4a2/0x1750 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462713]  ? radix_tree_lookup_slot+0x22/0x50
Apr 22 11:43:01 t450s kernel: [14602.462733]  ? shmem_getpage_gfp+0xf9/0xc10
Apr 22 11:43:01 t450s kernel: [14602.462768]  ? i915_gem_free_object+0x58/0x60 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462805]  i915_gem_execbuffer2+0xa1/0x1e0 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462841]  drm_ioctl+0x21b/0x4c0 [drm]
Apr 22 11:43:01 t450s kernel: [14602.462874]  ? i915_gem_execbuffer+0x310/0x310 [i915]
Apr 22 11:43:01 t450s kernel: [14602.462898]  ? __seccomp_filter+0x67/0x250
Apr 22 11:43:01 t450s kernel: [14602.462917]  do_vfs_ioctl+0xa3/0x610
Apr 22 11:43:01 t450s kernel: [14602.462934]  ? __secure_computing+0x3f/0xd0
Apr 22 11:43:01 t450s kernel: [14602.462953]  ? syscall_trace_enter+0xcd/0x2e0
Apr 22 11:43:01 t450s kernel: [14602.462973]  SyS_ioctl+0x79/0x90
Apr 22 11:43:01 t450s kernel: [14602.462988]  do_syscall_64+0x5b/0xc0
Apr 22 11:43:01 t450s kernel: [14602.463005]  entry_SYSCALL64_slow_path+0x25/0x25
Apr 22 11:43:01 t450s kernel: [14602.463025] RIP: 0033:0x7f308a6d7987
Apr 22 11:43:01 t450s kernel: [14602.463042] RSP: 002b:00007fff2b7ea128 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Apr 22 11:43:01 t450s kernel: [14602.463073] RAX: ffffffffffffffda RBX: 0000557c33c51050 RCX: 00007f308a6d7987
Apr 22 11:43:01 t450s kernel: [14602.463102] RDX: 00007fff2b7ea170 RSI: 00000000c0406469 RDI: 00000000000000f2
Apr 22 11:43:01 t450s kernel: [14602.463135] RBP: 00007fff2b7ea170 R08: 0000000000000000 R09: 0000000000000000
Apr 22 11:43:01 t450s kernel: [14602.463163] R10: 00000000000014b0 R11: 0000000000000246 R12: 00000000c0406469
Apr 22 11:43:01 t450s kernel: [14602.463194] R13: 00000000000000f2 R14: 0000000000000000 R15: 0000000000000000
Apr 22 11:43:01 t450s kernel: [14602.463223] Code: e6 48 8b 90 20 03 00 00 48 8b b8 d8 02 00 00 48 8b 52 08 48 83 ca 03 e8 ca cd ff ff 48 8b 45 b0 48 8b 4d c8 48 8b 10 48 8b 45 d0 <4c> 89 24 ca 48 0f ab 08 0f 1f 44 00 00 e9 53 ff ff ff 65 8b 05 
Apr 22 11:43:01 t450s kernel: [14602.463338] RIP: gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915] RSP: ffff9b8888633880
Apr 22 11:43:01 t450s kernel: [14602.463376] CR2: 0000000000000018
Apr 22 11:43:01 t450s kernel: [14602.473606] ---[ end trace 7736cbd82119de7c ]---