Feb  4 15:22:03 mama-tata-laptop kernel: [    1.818888] 
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO 
underrun
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822564] [drm] RC6 disabled, 
disabling runtime PM support
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822604] BUG: unable to handle 
kernel NULL pointer dereference at 0000000000000008
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822613] PGD 0 P4D 0 
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822623] Oops: 0000 [#1] SMP PTI
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822631] CPU: 0 PID: 176 Comm: 
systemd-udevd Not tainted 4.18.0-14-generic #15-Ubuntu
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822639] Hardware name: LENOVO 
647814G/647814G, BIOS 7TET36WW (1.10 ) 05/11/2009
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822732] RIP: 
0010:gen4_render_ring_flush+0x60/0x110 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822737] Code: 00 48 89 df e8 51 
fe ff ff 48 3d 00 f0 ff ff 77 6c 44 89 20 48 8d 48 44 c7 40 04 02 40 00 7a 48 
8b 53 78 48 8b 92 10 02 00 00 <48> 8b 52 08 48 c7 40 0c 00 00 00 00 83 ca 04 89 
50 08 48 8d 50 14 
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822817] RSP: 
0018:ffffb15f80a3f978 EFLAGS: 00010287
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822825] RAX: ffffb15f90002000 
RBX: ffff967c30438240 RCX: ffffb15f90002044
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822832] RDX: 0000000000000000 
RSI: 00000000000001a8 RDI: 0000000000000150
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822838] RBP: ffffb15f80a3f988 
R08: 0000000000000001 R09: 000000003c4a9d47
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822846] R10: 00000000181a474d 
R11: ffff967c30438240 R12: 0000000002000002
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822852] R13: ffff967c30438240 
R14: ffff967c31389000 R15: ffff967c30dc8000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822860] FS:  
00007f8967b738c0(0000) GS:ffff967c3bc00000(0000) knlGS:0000000000000000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822868] CS:  0010 DS: 0000 ES: 
0000 CR0: 0000000080050033
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822874] CR2: 0000000000000008 
CR3: 0000000130cc4000 CR4: 00000000000006f0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822881] Call Trace:
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.822970]  
i915_request_alloc+0x24e/0x370 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823055]  
i915_gem_init+0x26b/0x470 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823131]  
i915_driver_load+0xab8/0xd80 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823143]  ? mutex_lock+0x12/0x30
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823219]  
i915_pci_probe+0x46/0x60 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823229]  
local_pci_probe+0x46/0x90
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823238]  
pci_device_probe+0x11c/0x1a0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823248]  
driver_probe_device+0x2e3/0x460
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823256]  
__driver_attach+0xe4/0x110
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823263]  ? 
driver_probe_device+0x460/0x460
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823271]  
bus_for_each_dev+0x74/0xb0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823279]  ? 
kmem_cache_alloc_trace+0x1c4/0x1d0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823287]  driver_attach+0x1e/0x20
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823294]  
bus_add_driver+0x159/0x230
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823301]  ? 0xffffffffc02ec000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823309]  
driver_register+0x70/0xc0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823315]  ? 0xffffffffc02ec000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823322]  
__pci_register_driver+0x57/0x60
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823398]  i915_init+0x55/0x58 
[i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823407]  
do_one_initcall+0x4a/0x1c4
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823415]  ? 
_cond_resched+0x19/0x30
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823422]  ? 
kmem_cache_alloc_trace+0xb8/0x1d0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823430]  ? 
do_init_module+0x27/0x220
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823437]  
do_init_module+0x60/0x220
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823445]  
load_module+0x14f4/0x1890
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823455]  
__do_sys_finit_module+0xbd/0x120
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823462]  ? 
__do_sys_finit_module+0xbd/0x120
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823471]  
__x64_sys_finit_module+0x1a/0x20
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823479]  
do_syscall_64+0x5a/0x110
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823486]  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823493] RIP: 0033:0x7f89685f8219
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823498] Code: 00 c3 66 2e 0f 1f 
84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 
4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 47 fc 0c 00 
f7 d8 64 89 01 48 
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823578] RSP: 
002b:00007ffce755bb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823588] RAX: ffffffffffffffda 
RBX: 000055919c1f4f70 RCX: 00007f89685f8219
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823596] RDX: 0000000000000000 
RSI: 00007f89684dccad RDI: 0000000000000012
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823603] RBP: 00007f89684dccad 
R08: 0000000000000000 R09: 0000000000000000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823610] R10: 0000000000000012 
R11: 0000000000000246 R12: 0000000000000000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823618] R13: 000055919c1ea340 
R14: 0000000000020000 R15: 000055919c1f4f70
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823626] Modules linked in: 
i915(+) psmouse input_leds serio_raw ahci libahci lpc_ich i2c_algo_bit 
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops video drm mac_hid
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823663] CR2: 0000000000000008
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823670] ---[ end trace 
143cccfd7ac102e9 ]---
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823757] RIP: 
0010:gen4_render_ring_flush+0x60/0x110 [i915]
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823763] Code: 00 48 89 df e8 51 
fe ff ff 48 3d 00 f0 ff ff 77 6c 44 89 20 48 8d 48 44 c7 40 04 02 40 00 7a 48 
8b 53 78 48 8b 92 10 02 00 00 <48> 8b 52 08 48 c7 40 0c 00 00 00 00 83 ca 04 89 
50 08 48 8d 50 14 
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823842] RSP: 
0018:ffffb15f80a3f978 EFLAGS: 00010287
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823850] RAX: ffffb15f90002000 
RBX: ffff967c30438240 RCX: ffffb15f90002044
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823858] RDX: 0000000000000000 
RSI: 00000000000001a8 RDI: 0000000000000150
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823865] RBP: ffffb15f80a3f988 
R08: 0000000000000001 R09: 000000003c4a9d47
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823872] R10: 00000000181a474d 
R11: ffff967c30438240 R12: 0000000002000002
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823880] R13: ffff967c30438240 
R14: ffff967c31389000 R15: ffff967c30dc8000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823888] FS:  
00007f8967b738c0(0000) GS:ffff967c3bc00000(0000) knlGS:0000000000000000
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823897] CS:  0010 DS: 0000 ES: 
0000 CR0: 0000000080050033
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.823904] CR2: 0000000000000008 
CR3: 0000000130cc4000 CR4: 00000000000006f0
Feb  4 15:22:03 mama-tata-laptop kernel: [    1.880571] gpio_ich: GPIO from 462 
to 511 on gpio_ich


** Attachment added: "kernel log with crash"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813657/+attachment/5235955/+files/kern.log

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https://bugs.launchpad.net/bugs/1813657

Title:
  4.18.0-14 doesn't boot past grub

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  4.18.0-14 doesn't boot past grub for me in thinkpad t510i. 4.18.0-13
  worked fine. I had to revert back  to 4.15 kernel. I'm using a distro
  that is based off of Ubuntu 18.04.

  System info:
  CPU:    Intel(R) Core(TM) i5 CPU       M 520  @ 2.40GHz
          4 cores/threads
          2400.00 MHz
  RAM:    7.59 GiB

  I'm not sure how to provide crash info, as the kernel doesn't boot.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  CurrentDesktop: X-Cinnamon
  DistroRelease: Linux Mint 19.1
  HibernationDevice: RESUME=UUID=fcc2ec6a-a02c-4188-ac0d-a8f924741962
  InstallationDate: Installed on 2019-01-10 (18 days ago)
  InstallationMedia: Linux Mint 19.1 "Tessa" - Release amd64 20181130
  Lsusb:
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 4349BR8
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-44-generic 
root=UUID=3478dfd0-edae-424a-a34f-9f230cb9cacc ro quiet splash
  ProcVersionSignature: Ubuntu 4.15.0-44.47-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-44-generic N/A
   linux-backports-modules-4.15.0-44-generic  N/A
   linux-firmware                             1.173.3
  Tags:  tessa
  Uname: Linux 4.15.0-44-generic x86_64
  UnreportableReason: This report is about a package that is not installed.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers wireshark
  _MarkForUpload: False
  dmi.bios.date: 10/26/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6MET81WW (1.41 )
  dmi.board.name: 4349BR8
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr6MET81WW(1.41):bd10/26/2010:svnLENOVO:pn4349BR8:pvrThinkPadT510:rvnLENOVO:rn4349BR8:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad T510
  dmi.product.name: 4349BR8
  dmi.product.version: ThinkPad T510
  dmi.sys.vendor: LENOVO

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