[root@localhost ~]# reboot [ 602.169933] [ 602.169934] ====================================================== [ 602.169934] [ INFO: possible circular locking dependency detected ] [ 602.169936] 3.8.0-rc4kotd+ #3 Not tainted [ 602.169936] ------------------------------------------------------- [ 602.169937] kworker/0:1/358 is trying to acquire lock: [ 602.169946] ((fb_notifier_list).rwsem){.+.+.+}, at: [] .__blocking_notifier_call_chain+0x80/0x120 [ 602.169947] [ 602.169947] but task is already holding lock: [ 602.169952] (console_lock){+.+.+.}, at: [] .console_callback+0x28/0x180 [ 602.169952] [ 602.169952] which lock already depends on the new lock. [ 602.169952] [ 602.169953] [ 602.169953] the existing dependency chain (in reverse order) is: [ 602.169955] [ 602.169955] -> #1 (console_lock){+.+.+.}: [ 602.169958] [] .lock_acquire+0xb8/0x250 [ 602.169961] [] .console_lock+0x90/0xb0 [ 602.169963] [] .register_con_driver+0x68/0x220 [ 602.169965] [] .take_over_console+0x44/0xc0 [ 602.169968] [] .fbcon_takeover+0x94/0x140 [ 602.169972] [] .notifier_call_chain+0xdc/0x220 [ 602.169974] [] .__blocking_notifier_call_chain+0x9c/0x120 [ 602.169976] [] .fb_notifier_call_chain+0x3c/0x60 [ 602.169978] [] .register_framebuffer+0x1f4/0x330 [ 602.169982] [] .drm_fb_helper_single_fb_probe+0x2cc/0x420 [drm_kms_helper] [ 602.169984] [] .drm_fb_helper_initial_config+0x1d4/0x2b0 [drm_kms_helper] [ 602.170001] [] .radeon_fbdev_init+0xe0/0x160 [radeon] [ 602.170013] [] .radeon_modeset_init+0x550/0xba0 [radeon] [ 602.170022] [] .radeon_driver_load_kms+0x14c/0x1a0 [radeon] [ 602.170032] [] .drm_get_pci_dev+0x1e0/0x2f0 [drm] [ 602.170041] [] .radeon_pci_probe+0xbc/0x110 [radeon] [ 602.170044] [] .local_pci_probe+0x6c/0xc0 [ 602.170045] [] .pci_device_probe+0x148/0x150 [ 602.170048] [] .driver_probe_device+0xdc/0x3e0 [ 602.170050] [] .__driver_attach+0x11c/0x120 [ 602.170051] [] .bus_for_each_dev+0x8c/0xf0 [ 602.170053] [] .driver_attach+0x38/0x60 [ 602.170054] [] .bus_add_driver+0x218/0x370 [ 602.170056] [] .driver_register+0xac/0x240 [ 602.170057] [] .__pci_register_driver+0x78/0xa0 [ 602.170063] [] .drm_pci_init+0x16c/0x1a0 [drm] [ 602.170080] [] .radeon_init+0x10c/0x134 [radeon] [ 602.170083] [] .do_one_initcall+0x178/0x1f0 [ 602.170086] [] .load_module+0x1808/0x2290 [ 602.170088] [] .SyS_init_module+0xf0/0x160 [ 602.170089] [] syscall_exit+0x0/0x94 [ 602.170091] [ 602.170091] -> #0 ((fb_notifier_list).rwsem){.+.+.+}: [ 602.170093] [] .__lock_acquire+0x1544/0x1b60 [ 602.170095] [] .lock_acquire+0xb8/0x250 [ 602.170097] [] .down_read+0x70/0x124 [ 602.170099] [] .__blocking_notifier_call_chain+0x80/0x120 [ 602.170101] [] .fb_notifier_call_chain+0x3c/0x60 [ 602.170102] [] .fb_blank+0x50/0x130 [ 602.170104] [] .fbcon_blank+0x2ac/0x350 [ 602.170106] [] .do_blank_screen+0x2b4/0x370 [ 602.170108] [] .console_callback+0x90/0x180 [ 602.170110] [] .process_one_work+0x210/0x7a0 [ 602.170112] [] .worker_thread+0x1c0/0x4a0 [ 602.170113] [] .kthread+0xf4/0x100 [ 602.170115] [] .ret_from_kernel_thread+0x64/0x88 [ 602.170115] [ 602.170115] other info that might help us debug this: [ 602.170115] [ 602.170116] Possible unsafe locking scenario: [ 602.170116] [ 602.170116] CPU0 CPU1 [ 602.170117] ---- ---- [ 602.170118] lock(console_lock); [ 602.170119] lock((fb_notifier_list).rwsem); [ 602.170120] lock(console_lock); [ 602.170121] lock((fb_notifier_list).rwsem); [ 602.170122] [ 602.170122] *** DEADLOCK *** [ 602.170122] [ 602.170123] 3 locks held by kworker/0:1/358: [ 602.170126] #0: (events){.+.+.+}, at: [] .process_one_work+0x188/0x7a0 [ 602.170129] #1: (console_work){+.+...}, at: [] .process_one_work+0x188/0x7a0 [ 602.170132] #2: (console_lock){+.+.+.}, at: [] .console_callback+0x28/0x180 [ 602.170133] [ 602.170133] stack backtrace: [ 602.170133] Call Trace: [ 602.170135] [c0000001f0893230] [c0000000000173a0] .show_stack+0xb0/0x1c0 (unreliable) [ 602.170138] [c0000001f08932e0] [c0000000008e2d24] .print_circular_bug+0x308/0x340 [ 602.170139] [c0000001f0893390] [c000000000127834] .__lock_acquire+0x1544/0x1b60 [ 602.170141] [c0000001f0893510] [c0000000001285a8] .lock_acquire+0xb8/0x250 [ 602.170143] [c0000001f08935f0] [c0000000008cc2d0] .down_read+0x70/0x124 [ 602.170145] [c0000001f0893680] [c0000000000d8320] .__blocking_notifier_call_chain+0x80/0x120 [ 602.170147] [c0000001f0893730] [c0000000004bd25c] .fb_notifier_call_chain+0x3c/0x60 [ 602.170148] [c0000001f08937c0] [c0000000004bdeb0] .fb_blank+0x50/0x130 [ 602.170150] [c0000001f0893860] [c0000000004cea1c] .fbcon_blank+0x2ac/0x350 [ 602.170152] [c0000001f08939b0] [c0000000005101c4] .do_blank_screen+0x2b4/0x370 [ 602.170154] [c0000001f0893a50] [c000000000514740] .console_callback+0x90/0x180 [ 602.170156] [c0000001f0893ae0] [c0000000000c1610] .process_one_work+0x210/0x7a0 [ 602.170157] [c0000001f0893be0] [c0000000000c2ea0] .worker_thread+0x1c0/0x4a0 [ 602.170159] [c0000001f0893ca0] [c0000000000cca04] .kthread+0xf4/0x100 [ 602.170161] [c0000001f0893e30] [c000000000009cdc] .ret_from_kernel_thread+0x64/0x88 [ 602.170571] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 602.170572] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 602.170573] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 602.170574] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 602.170575] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 602.170579] [drm:drm_vblank_get], enabling vblank on crtc 0, ret: 0 [ 602.170586] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 0 : v 7 p(8191,-806)@ 602.71064 -> 602.87606 [e 1 us, 0 rep] [ 602.170587] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 0, missed 0 [ 607.179532] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 607.179535] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing C898 (len 62, WS 0, PS 0) @ 0xC8B4 [ 607.179592] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 607.179594] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 607.179596] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 607.179598] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 607.179599] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 607.179601] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 607.179607] [drm:drm_vblank_get], enabling vblank on crtc 1, ret: 0 [ 607.179616] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 1 : v 7 p(8191,-806)@ 607.80094 -> 607.96636 [e 2 us, 0 rep] [ 607.179620] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 1, missed 0 [ 607.179633] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 607.179634] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 607.179635] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 607.179637] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 607.179638] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 607.179640] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 607.179641] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 607.179646] [drm:drm_vblank_get], enabling vblank on crtc 2, ret: 0 [ 607.179652] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 2 : v 7 p(8191,-806)@ 607.80130 -> 607.96672 [e 1 us, 0 rep] [ 607.179655] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 2, missed 0 [ 607.179666] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 607.179667] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 607.179669] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 607.179670] [drm:evergreen_irq_set], evergreen_irq_set: vblank 3 [ 607.179672] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 607.179673] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 607.179675] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 607.179676] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 607.179681] [drm:drm_vblank_get], enabling vblank on crtc 3, ret: 0 [ 607.179686] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 3 : v 7 p(8191,-806)@ 607.80165 -> 607.96707 [e 1 us, 0 rep] [ 607.179689] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 3, missed 0 [ 612.189535] [drm:vblank_disable_fn], disabling vblank on crtc 2 [ 612.189578] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 612.189581] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 612.189583] [drm:evergreen_irq_set], evergreen_irq_set: vblank 3 [ 612.189585] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 612.189587] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 612.189589] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 612.189591] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 612.189605] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 2 : v 7 p(8191,-806)@ 612.90082 -> 612.106624 [e 2 us, 0 rep] [ 612.189610] [drm:vblank_disable_fn], disabling vblank on crtc 3 [ 612.189624] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 612.189626] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 612.189628] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 612.189629] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 612.189631] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 612.189633] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 612.189642] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 3 : v 7 p(8191,-806)@ 612.90121 -> 612.106663 [e 2 us, 0 rep] [ 612.209530] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 612.209533] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing C898 (len 62, WS 0, PS 0) @ 0xC8B4 [ 612.209594] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 612.209596] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 612.209597] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 612.209599] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 612.209600] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 612.209602] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 612.209603] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 612.209608] [drm:drm_vblank_get], enabling vblank on crtc 2, ret: 0 [ 612.209616] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 2 : v 7 p(8191,-806)@ 612.110094 -> 612.126636 [e 2 us, 0 rep] [ 612.209620] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 2, missed 0 [ 612.209636] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 612.209637] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 612.209639] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 612.209640] [drm:evergreen_irq_set], evergreen_irq_set: vblank 3 [ 612.209642] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 612.209644] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 612.209645] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 612.209647] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 612.209651] [drm:drm_vblank_get], enabling vblank on crtc 3, ret: 0 [ 612.209657] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 3 : v 7 p(8191,-806)@ 612.110136 -> 612.126678 [e 1 us, 0 rep] [ 612.209659] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 3, missed 0 [ 617.219536] [drm:vblank_disable_fn], disabling vblank on crtc 3 [ 617.219550] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 617.219552] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 617.219554] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 617.219555] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 617.219557] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 617.219558] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 617.219560] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 617.219573] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 3 : v 7 p(8191,-806)@ 617.120050 -> 617.136592 [e 2 us, 0 rep] [ 617.219578] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 617.219581] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing C898 (len 62, WS 0, PS 0) @ 0xC8B4 [ 617.219609] [drm:evergreen_irq_set], evergreen_irq_set: vblank 0 [ 617.219610] [drm:evergreen_irq_set], evergreen_irq_set: vblank 1 [ 617.219612] [drm:evergreen_irq_set], evergreen_irq_set: vblank 2 [ 617.219613] [drm:evergreen_irq_set], evergreen_irq_set: vblank 3 [ 617.219614] [drm:evergreen_irq_set], evergreen_irq_set: hpd 1 [ 617.219616] [drm:evergreen_irq_set], evergreen_irq_set: hpd 2 [ 617.219617] [drm:evergreen_irq_set], evergreen_irq_set: hpd 3 [ 617.219619] [drm:evergreen_irq_set], evergreen_irq_set: hpd 4 [ 617.219623] [drm:drm_vblank_get], enabling vblank on crtc 3, ret: 0 [ 617.219629] [drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 3 : v 7 p(8191,-806)@ 617.120108 -> 617.136650 [e 1 us, 0 rep] [ 617.219632] [drm:drm_update_vblank_count], enabling vblank interrupts on crtc 3, missed 0 [ 622.229534] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 622.229538] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing C898 (len 62, WS 0, PS 0) @ 0xC8B4 [ 626.104658] type=1305 audit(1358809670.390:128): audit_pid=0 old=774 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditd_t:s0 res=1 [ 626.282402] type=1131 audit(1358809670.570:129): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="rpcbind" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed' [ 626.440865] type=1131 audit(1358809670.730:130): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="auditd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ 626.580579] type=1131 audit(1358809670.870:131): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="abrtd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ 626.585945] type=1131 audit(1358809670.870:132): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="serial-getty@hvc0" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ 626.680992] type=1131 audit(1358809670.970:133): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="sendmail" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ 626.910453] type=1131 audit(1358809671.200:134): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="iprinit" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ OK ] Started Show Plymouth Reboot Screen. [ 627.291813] type=1130 audit(1358809671.580:135): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="plymouth-reboot" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ OK ] Stopped Network Manager. [ 627.460827] type=1131 audit(1358809671.750:136): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="NetworkManager" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ OK ] Stopped Permit User Sessions. [ 627.720726] type=1131 audit(1358809672.010:137): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="systemd-user-sessions" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ OK ] Stopped target Remote File Systems. [ OK ] Stopped target Basic System. [ OK ] Stopped target Sockets. [ OK ] Closed PC/SC Smart Card Daemon Activation Socket. [ OK ] Closed Avahi mDNS/DNS-SD Stack Activation Socket. [ OK ] Closed CUPS Printing Service Sockets. [ OK ] Closed RPCbind Server Activation Socket. [ OK ] Closed Syslog Socket. [ OK ] Closed D-Bus System Message Bus Socket. [ OK ] Stopped target System Initialization. Stopping Load legacy module configuration... [ OK ] Stopped Load legacy module configuration. Stopping Software RAID Monitor Takeover... [ OK ] Stopped Software RAID Monitor Takeover. Stopping Apply Kernel Variables... [ OK ] Stopped Apply Kernel Variables. [ OK ] Stopped target Swap. [ OK ] Deactivated swap /dev/disk/by-uuid/94f1e2ff-c076-46a...a-16ff33add95e. [ OK ] Stopped target Local File Systems. Unmounting /boot... Stopping Configure read-only root support... [ OK ] Stopped Configure read-only root support. Stopping Initialize storage subsystems (RAID, LVM, etc.)... [ OK ] Stopped Initialize storage subsystems (RAID, LVM, etc.). Stopping Initialize storage subsystems (RAID, LVM, etc.)... [ OK ] Stopped Initialize storage subsystems (RAID, LVM, etc.). Stopping Wait for storage scan... [ OK ] Stopped Wait for storage scan. [ OK ] Stopped target Encrypted Volumes. Unmounting Temporary Directory... Stopping Setup Virtual Console... [ OK ] Stopped Setup Virtual Console. [ OK ] Unmounted /boot. [ OK ] Unmounted Temporary Directory. [ OK ] Reached target Unmount All Filesystems. [ OK ] Stopped target Local File Systems (Pre). Stopping Remount Root and Kernel File Systems... [ OK ] Stopped Remount Root and Kernel File Systems. Starting Save Random Seed... Starting Update UTMP about System Shutdown... Stopping Replay Read-Ahead Data... [ OK ] Stopped Replay Read-Ahead Data. Stopping Collect Read-Ahead Data... [ OK ] Stopped Collect Read-Ahead Data. [ OK ] Reached target Shutdown. [ 630.045426] systemd-journald[704]: Received SIGTERM Sending SIGTERM to remaining processes... Sending SIGKILL to remaining processes... Unmounting file systems. Unmounted /sys/kernel/config. Unmounted /dev/hugepages. Unmounted /dev/mqueue. Unmounted /sys/kernel/debug. [ 630.300297] EXT4-fs (sda5): re-mounted. Opts: (null) Disabling swaps. Detaching loop devices. Detaching DM devices. [ 630.347772] Kernel panic - not syncing: OMG!! [ 630.347782] Call Trace: [ 630.347789] [c0000001fa3035b0] [c0000000000173a0] .show_stack+0xb0/0x1c0 (unreliable) [ 630.347797] [c0000001fa303660] [c0000000008e0f0c] .panic+0xf4/0x280 [ 630.347802] [c0000001fa303700] [c00000000006cbdc] .eeh_dev_check_failure+0x26c/0x350 [ 630.347808] [c0000001fa3037b0] [c00000000002e008] .rtas_read_config+0x148/0x190 [ 630.347815] [c0000001fa303860] [c000000000499718] .pci_bus_read_config_word+0xd8/0x130 [ 630.347820] [c0000001fa303920] [c0000000004b8048] .msi_set_enable+0x58/0xb0 [ 630.347825] [c0000001fa3039c0] [c0000000004b96ec] .pci_msi_shutdown+0x9c/0x140 [ 630.347831] [c0000001fa303a60] [c0000000004a67b4] .pci_device_shutdown+0x74/0xb0 [ 630.347836] [c0000001fa303af0] [c0000000005450dc] .device_shutdown+0x5c/0x200 [ 630.347843] [c0000001fa303b90] [c0000000000b8234] .kernel_restart_prepare+0x54/0x80 [ 630.347848] [c0000001fa303c10] [c0000000000b828c] .kernel_restart+0x2c/0xc0 [ 630.347853] [c0000001fa303c90] [c0000000000b85dc] .SyS_reboot+0x28c/0x340 [ 630.347858] [c0000001fa303e30] [c0000000000099e0] syscall_exit+0x0/0x94 [ 630.351441] drm_kms_helper: panic occurred, switching back to text console [ 630.367352] Rebooting in 10 seconds..