Kernel panic when starting up.
Here's the syslog:
Jan 7 19:11:31 localhost kernel: [ 26.484483] nouveau 0000:04:00.0: DRM: resuming kernel object tree...
Jan 7 19:11:31 localhost exim4[1013]: Starting MTA: exim4.
Jan 7 19:11:31 localhost kernel: [ 26.592634] nouveau 0000:04:00.0: DRM: resuming client object trees...
Jan 7 19:11:33 localhost kernel: [ 27.110820] BUG: unable to handle kernel NULL pointer dereference at (null)
Jan 7 19:11:33 localhost kernel: [ 27.110867] IP: [<ffffffffa0683835>] nvkm_pmu_pgob+0x5/0x20 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.110930] PGD 0
Jan 7 19:11:33 localhost kernel: [ 27.110942] Oops: 0000 [#1] SMP
Jan 7 19:11:33 localhost kernel: [ 27.110961] Modules linked in: binfmt_misc cpufreq_userspace cpufreq_powersave cpufreq_conservative cpufreq_stats 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_recent xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables nls_utf8 nls_cp437 vfat fat uvcvideo videobuf2_vmalloc videobuf2_memops intel_rapl videobuf2_core x86_pkg_temp_thermal v4l2_common intel_powerclamp videodev coretemp media kvm_intel kvm crct10dif_pclmul crc32_pclmul asus_nb_wmi asus_wmi joydev sparse_keymap snd_hda_codec_conexant snd_hda_codec_hdmi snd_hda_codec_generic iTCO_wdt iTCO_vendor_support sha256_ssse3 sha256_generic hmac drbg arc4 ansi_cprng aesni_intel ath9k ath9k_common ath9k_hw ath aes_x86_64 lrw mac80211 gf128mul cfg80211 snd_soc_rt5640 glue_helper snd_soc_rl6231 rfkill ablk_helper snd_hda_intel snd_soc_core snd_hda_codec cryptd snd_hda_core nouveau snd_compress mxm_wmi ttm pcspkr psmouse snd_hwdep evdev regmap_i2c elan_i2c processor_thermal_device serio_raw efi_pstore efivars snd_pcm snd_timer intel_soc_dts_iosf i915 int3402_thermal wmi drm_kms_helper drm iosf_mbi shpchp dw_dmac dw_dmac_core battery int340x_thermal_zone snd int3400_thermal i2c_algo_bit i2c_designware_platform acpi_thermal_rel i2c_designware_core soundcore video ac snd_soc_sst_acpi mei_me mei lpc_ich mfd_core button i2c_i801 processor loop fuse bridge stp llc autofs4 ext4 crc16 mbcache jbd2 dm_mod hid_generic usbhid sg sr_mod cdrom sd_mod crc32c_intel ahci libahci libata scsi_mod ehci_pci ehci_hcd xhci_pci xhci_hcd alx mdio usbcore usb_common thermal i2c_hid sdhci_acpi hid sdhci mmc_core
Jan 7 19:11:33 localhost kernel: [ 27.111828] CPU: 0 PID: 1010 Comm: Xorg Not tainted 4.3.0-0.bpo.1-amd64 #1 Debian 4.3.3-2~bpo8+1
Jan 7 19:11:33 localhost kernel: [ 27.111860] Hardware name: ASUSTeK COMPUTER INC. X450LD/X450LD, BIOS X450LD.208 06/11/2014
Jan 7 19:11:33 localhost kernel: [ 27.111891] task: ffff8800369b7080 ti: ffff8800c6afc000 task.ti: ffff8800c6afc000
Jan 7 19:11:33 localhost kernel: [ 27.111918] RIP: 0010:[<ffffffffa0683835>] [<ffffffffa0683835>] nvkm_pmu_pgob+0x5/0x20 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.111970] RSP: 0018:ffff8800c6affb10 EFLAGS: 00010286
Jan 7 19:11:33 localhost kernel: [ 27.111990] RAX: ffffffffa06b12e0 RBX: ffff8800c91c8008 RCX: 0000000000000018
Jan 7 19:11:33 localhost kernel: [ 27.112016] RDX: ffffffffa0720d40 RSI: 0000000000000000 RDI: 0000000000000000
Jan 7 19:11:33 localhost kernel: [ 27.112041] RBP: ffff8800c91c8018 R08: 00000000006f9007 R09: 000000000000902d
Jan 7 19:11:33 localhost kernel: [ 27.112067] R10: ffffffffa06b0ce0 R11: ffff8800c6affdc8 R12: ffff880036b75800
Jan 7 19:11:33 localhost kernel: [ 27.112093] R13: ffff8800c8d22800 R14: ffff8800369888d8 R15: ffff8800c8066018
Jan 7 19:11:33 localhost kernel: [ 27.112119] FS: 00007f2bf5b8f980(0000) GS:ffff88012ee00000(0000) knlGS:0000000000000000
Jan 7 19:11:33 localhost kernel: [ 27.112148] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 7 19:11:33 localhost kernel: [ 27.112169] CR2: 0000000000000000 CR3: 00000000c783d000 CR4: 00000000001406f0
Jan 7 19:11:33 localhost kernel: [ 27.112195] Stack:
Jan 7 19:11:33 localhost kernel: [ 27.112203] ffffffffa06b1308 ffffffffa0612ad8 ffff880000000000 00000006505e782f
Jan 7 19:11:33 localhost kernel: [ 27.112234] ffff8800c91c8018 ffff880036b75800 ffff8800c91c8010 ffff8800369888d8
Jan 7 19:11:33 localhost kernel: [ 27.112265] ffff8800c8066018 ffffffffa063e6c4 ffff8800c91c8018 ffff8800c91c8030
Jan 7 19:11:33 localhost kernel: [ 27.112305] Call Trace:
Jan 7 19:11:33 localhost kernel: [ 27.112333] [<ffffffffa06b1308>] ? gf100_gr_oneinit+0x28/0x280 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112357] [<ffffffffa0612ad8>] ? ttm_bo_handle_move_mem+0x288/0x5f0 [ttm]
Jan 7 19:11:33 localhost kernel: [ 27.112385] [<ffffffffa063e6c4>] ? nvkm_engine_init+0x74/0x1d0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112413] [<ffffffffa064247f>] ? nvkm_subdev_init+0xaf/0x200 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112440] [<ffffffffa063e8bb>] ? nvkm_engine_ref+0x4b/0x70 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112466] [<ffffffffa063f942>] ? nvkm_ioctl_new+0x132/0x2a0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112504] [<ffffffffa06a66a8>] ? nvkm_gr_oclass_get+0x28/0x90 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112542] [<ffffffffa06a1cb4>] ? nvkm_fifo_chan_child_get+0x64/0x120 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112581] [<ffffffffa06a2190>] ? nvkm_fifo_chan_dtor+0xa0/0xa0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112609] [<ffffffffa0641520>] ? nvkm_object_new_+0x60/0x60 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112652] [<ffffffffa0640075>] ? nvkm_ioctl+0x1a5/0x260 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112691] [<ffffffffa063d64a>] ? nvif_object_init+0xba/0x120 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112731] [<ffffffffa06e5bed>] ? nouveau_abi16_ioctl_grobj_alloc+0x17d/0x2f0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.112757] [<ffffffff812e7858>] ? __rb_insert_augmented+0x1b8/0x1f0
Jan 7 19:11:33 localhost kernel: [ 27.112784] [<ffffffffa03e02d0>] ? drm_ioctl+0x110/0x470 [drm]
Jan 7 19:11:33 localhost kernel: [ 27.113736] [<ffffffff8118dd3e>] ? do_set_pte+0x9e/0xd0
Jan 7 19:11:33 localhost kernel: [ 27.114646] [<ffffffffa06e5a70>] ? nouveau_abi16_ioctl_channel_free+0xa0/0xa0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.115565] [<ffffffffa06ce950>] ? nouveau_drm_ioctl+0x60/0xb0 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.116471] [<ffffffff811e31e5>] ? do_vfs_ioctl+0x2d5/0x4b0
Jan 7 19:11:33 localhost kernel: [ 27.117357] [<ffffffff811e3436>] ? SyS_ioctl+0x76/0x90
Jan 7 19:11:33 localhost kernel: [ 27.118206] [<ffffffff81585876>] ? system_call_fast_compare_end+0xc/0x6b
Jan 7 19:11:33 localhost kernel: [ 27.119030] Code: 81 c6 14 a0 10 00 e8 eb 66 c7 e0 48 8d 7b 58 e8 32 8f a0 e0 31 c0 5b c3 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <48> 8b 07 48 8b 40 28 48 85 c0 74 06 40 0f b6 f6 ff e0 f3 c3 0f
Jan 7 19:11:33 localhost kernel: [ 27.120745] RIP [<ffffffffa0683835>] nvkm_pmu_pgob+0x5/0x20 [nouveau]
Jan 7 19:11:33 localhost kernel: [ 27.121561] RSP <ffff8800c6affb10>
Jan 7 19:11:33 localhost kernel: [ 27.122329] CR2: 0000000000000000
Jan 7 19:11:33 localhost kernel: [ 27.126850] ---[ end trace 190e8335ad0a5b42 ]---
Jan 7 19:11:33 localhost ModemManager[817]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0': not supported by any plugin
Jan 7 19:11:33 localhost ModemManager[817]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.3/0000:03:00.0': not supported by any plugin
Jan 7 19:11:35 localhost NetworkManager[816]: <info> startup complete
Jan 7 19:11:46 localhost ModemManager[817]: <info> Caught signal, shutting down...
Jan 7 19:11:46 localhost NetworkManager[816]: <info> caught signal 15, shutting down normally.
Jan 7 19:11:46 localhost kernel: [ 41.649719] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jan 7 19:11:46 localhost kernel: [ 41.650318] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Jan 7 19:11:46 localhost NetworkManager[816]: <info> (eth0): device state change: unavailable -> unmanaged (reason 'removed') [20 10 36]
Jan 7 19:11:46 localhost NetworkManager[816]: <info> (wlan0): device state change: unavailable -> unmanaged (reason 'removed') [20 10 36]
Jan 7 19:11:46 localhost ModemManager[817]: <info> ModemManager is shut down
Jan 7 19:11:46 localhost rsyslogd: [origin software="rsyslogd" swVersion="8.4.2" x-pid="923" x-info="
http://www.rsyslog.com"] exiting on signal 15.