Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.20 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20/

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https://bugs.launchpad.net/bugs/1810345

Title:
  kernel: general protection fault: 0000 [#1] SMP PTI

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  using 18.10, all updates included. Desktop (gnome on wayland) is
  crashing from time to time at idle, or on reactivating from
  screensaver or while working(mostly while playing videos in browsers)
  where only sysreq gets to reboot. Running kernel 4.18.0-13-generic
  #14-Ubuntu

  Looking at the logs i found:

  Jan  2 23:29:07 ThinkPad kernel: [44709.167257] general protection fault: 
0000 [#1] SMP PTI
  Jan  2 23:29:07 ThinkPad kernel: [44709.167284] CPU: 0 PID: 22311 Comm: 
kworker/u17:0 Not tainted 4.18.0-13-generic #14-Ubuntu
  Jan  2 23:29:07 ThinkPad kernel: [44709.167286] Hardware name: LENOVO 
2325TZX/2325TZX, BIOS G2ETB3WW (2.73 ) 06/19/2018
  Jan  2 23:29:07 ThinkPad kernel: [44709.167315] Workqueue: hci0 hci_rx_work 
[bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167325] RIP: 
0010:__wake_up_common+0xb4/0x140
  Jan  2 23:29:07 ThinkPad kernel: [44709.167327] Code: 4d 85 ed 74 25 41 83 c4 
01 41 83 fc 40 7e 1b 49 8d 46 18 48 39 c3 75 70 8b 45 c4 48 83 c4 18 5b 41 5c 
41 5d 41 5e 41 5f 5d c3 <49> 8b 56 18 49 8d 46 18 4c 89 f7 4c 8d 72 e8 48 39 c3 
75 94 eb d8 
  Jan  2 23:29:07 ThinkPad kernel: [44709.167376] RSP: 0018:ffffa941c3c0fbd8 
EFLAGS: 00010083
  Jan  2 23:29:07 ThinkPad kernel: [44709.167379] RAX: 0000000000000000 RBX: 
ffff9c5d5ef42008 RCX: 0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167381] RDX: 0000000000000001 RSI: 
0000000000000082 RDI: 0000000000000082
  Jan  2 23:29:07 ThinkPad kernel: [44709.167384] RBP: ffffa941c3c0fc18 R08: 
0000000000000000 R09: ffffa941c3c0fb50
  Jan  2 23:29:07 ThinkPad kernel: [44709.167386] R10: ffff9c5e03920400 R11: 
0000000000000a00 R12: 0000000000000002
  Jan  2 23:29:07 ThinkPad kernel: [44709.167389] R13: ffffa941c3c0fc30 R14: 
dead0000000000e8 R15: 0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167392] FS:  0000000000000000(0000) 
GS:ffff9c5f1e200000(0000) knlGS:0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167395] CS:  0010 DS: 0000 ES: 0000 
CR0: 0000000080050033
  Jan  2 23:29:07 ThinkPad kernel: [44709.167397] CR2: 00007f741dc00000 CR3: 
00000001cd20a005 CR4: 00000000001606f0
  Jan  2 23:29:07 ThinkPad kernel: [44709.167399] Call Trace:
  Jan  2 23:29:07 ThinkPad kernel: [44709.167407]  
__wake_up_common_lock+0x80/0xc0
  Jan  2 23:29:07 ThinkPad kernel: [44709.167412]  __wake_up+0x13/0x20
  Jan  2 23:29:07 ThinkPad kernel: [44709.167418]  sock_def_wakeup+0x36/0x40
  Jan  2 23:29:07 ThinkPad kernel: [44709.167440]  
l2cap_sock_teardown_cb+0x192/0x1f0 [bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167460]  l2cap_chan_del+0x4a/0x2f0 
[bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167481]  
l2cap_sig_channel+0xb55/0x1270 [bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167486]  ? __switch_to_asm+0x34/0x70
  Jan  2 23:29:07 ThinkPad kernel: [44709.167490]  ? __switch_to_asm+0x40/0x70
  Jan  2 23:29:07 ThinkPad kernel: [44709.167493]  ? __switch_to_asm+0x34/0x70
  Jan  2 23:29:07 ThinkPad kernel: [44709.167513]  l2cap_recv_frame+0x280/0xc80 
[bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167517]  ? __switch_to_asm+0x40/0x70
  Jan  2 23:29:07 ThinkPad kernel: [44709.167519]  ? __switch_to_asm+0x34/0x70
  Jan  2 23:29:07 ThinkPad kernel: [44709.167542]  
l2cap_recv_acldata+0x2f6/0x300 [bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167558]  hci_rx_work+0x28f/0x380 
[bluetooth]
  Jan  2 23:29:07 ThinkPad kernel: [44709.167565]  process_one_work+0x20f/0x3c0
  Jan  2 23:29:07 ThinkPad kernel: [44709.167570]  worker_thread+0x34/0x400
  Jan  2 23:29:07 ThinkPad kernel: [44709.167575]  kthread+0x120/0x140
  Jan  2 23:29:07 ThinkPad kernel: [44709.167579]  ? 
pwq_unbound_release_workfn+0xd0/0xd0
  Jan  2 23:29:07 ThinkPad kernel: [44709.167583]  ? kthread_bind+0x40/0x40
  Jan  2 23:29:07 ThinkPad kernel: [44709.167586]  ret_from_fork+0x35/0x40
  Jan  2 23:29:07 ThinkPad kernel: [44709.167589] Modules linked in: rfcomm 
hidp rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache ccm cmac bnep 
nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic 
wmi_bmof intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp 
snd_hda_intel kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul 
snd_hda_codec ghash_clmulni_intel snd_hda_core pcbc snd_hwdep snd_pcm 
aesni_intel aes_x86_64 crypto_simd arc4 cryptd glue_helper intel_cstate 
intel_rapl_perf iwldvm snd_seq_midi snd_seq_midi_event uvcvideo mac80211 btusb 
input_leds snd_rawmidi joydev btrtl serio_raw btbcm videobuf2_vmalloc btintel 
snd_seq videobuf2_memops thinkpad_acpi videobuf2_v4l2 iwlwifi bluetooth 
videobuf2_common i915 nvram videodev snd_seq_device ecdh_generic snd_timer 
media cfg80211 drm_kms_helper mei_me
  Jan  2 23:29:07 ThinkPad kernel: [44709.167653]  mei snd wmi drm mac_hid 
soundcore i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt video 
sch_fq_codel parport_pc sunrpc ppdev lp parport ip_tables x_tables autofs4 
hid_generic usbhid hid gpio_ich psmouse e1000e ahci i2c_i801 sdhci_pci libahci 
cqhci lpc_ich sdhci
  Jan  2 23:29:07 ThinkPad kernel: [44709.167685] ---[ end trace 
fb54c7177987a5ab ]---
  Jan  2 23:29:07 ThinkPad kernel: [44709.167689] RIP: 
0010:__wake_up_common+0xb4/0x140
  Jan  2 23:29:07 ThinkPad kernel: [44709.167691] Code: 4d 85 ed 74 25 41 83 c4 
01 41 83 fc 40 7e 1b 49 8d 46 18 48 39 c3 75 70 8b 45 c4 48 83 c4 18 5b 41 5c 
41 5d 41 5e 41 5f 5d c3 <49> 8b 56 18 49 8d 46 18 4c 89 f7 4c 8d 72 e8 48 39 c3 
75 94 eb d8 
  Jan  2 23:29:07 ThinkPad kernel: [44709.167736] RSP: 0018:ffffa941c3c0fbd8 
EFLAGS: 00010083
  Jan  2 23:29:07 ThinkPad kernel: [44709.167740] RAX: 0000000000000000 RBX: 
ffff9c5d5ef42008 RCX: 0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167742] RDX: 0000000000000001 RSI: 
0000000000000082 RDI: 0000000000000082
  Jan  2 23:29:07 ThinkPad kernel: [44709.167745] RBP: ffffa941c3c0fc18 R08: 
0000000000000000 R09: ffffa941c3c0fb50
  Jan  2 23:29:07 ThinkPad kernel: [44709.167748] R10: ffff9c5e03920400 R11: 
0000000000000a00 R12: 0000000000000002
  Jan  2 23:29:07 ThinkPad kernel: [44709.167750] R13: ffffa941c3c0fc30 R14: 
dead0000000000e8 R15: 0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167754] FS:  0000000000000000(0000) 
GS:ffff9c5f1e200000(0000) knlGS:0000000000000000
  Jan  2 23:29:07 ThinkPad kernel: [44709.167756] CS:  0010 DS: 0000 ES: 0000 
CR0: 0000000080050033
  Jan  2 23:29:07 ThinkPad kernel: [44709.167759] CR2: 00007f741dc00000 CR3: 
00000001cd20a005 CR4: 00000000001606f0
  Jan  2 23:29:07 ThinkPad snapd[844]: udevmon.go:184: udev monitor observed 
remove event for unknown device 
"/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.0/bluetooth/hci0/hci0:11/0005:0065:8502.000F/power_supply/hid-90:7f:61:00:42:a5-battery"


  I am using BT for a BT Keyboard on that machine.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: linux-generic 4.18.0.13.14
  ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
  Uname: Linux 4.18.0-13-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  k1l        2100 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan  2 23:40:25 2019
  InstallationDate: Installed on 2018-10-19 (75 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 
(20181017.3)
  MachineType: LENOVO 2325TZX
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-13-generic 
root=UUID=cd3606bb-9444-4ef8-bcaa-6e21674ca895 ro quiet splash vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-4.18.0-13-generic N/A
   linux-backports-modules-4.18.0-13-generic  N/A
   linux-firmware                             1.175.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/19/2018
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ETB3WW (2.73 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2325TZX
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvrG2ETB3WW(2.73):bd06/19/2018:svnLENOVO:pn2325TZX:pvrThinkPadX230:rvnLENOVO:rn2325TZX:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad X230
  dmi.product.name: 2325TZX
  dmi.product.sku: LENOVO_MT_2325
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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