Kao,

Please test kernel in [1].
This kernel disables Bluetooth LE advertising event before suspend.
I no longer see the issue on the XPS 9370 at my hand.

[1]https://people.canonical.com/~khfeng/lp1799988/

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https://bugs.launchpad.net/bugs/1799988

Title:
  Missing wifi and bluetooth after sleep on XPS 9370

Status in Dell Sputnik:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  I have XPS9370 with self-installed Ubuntu 18.10 (not project sputnik) with 
Killer 1435 wireless module.
  And sometimes I find wifi and bluetooth missing after sleep. I cannot exactly 
define preconditions, but it seems there are following steps to reproduce the 
issue
  1. Connect something via bluetooth  (I use bluetooth headset)
  2. Send laptop to sleep
  3. Wake it and find wifi and bluetooth missing.

  I have to mention that I have also been experienced bluetooth only
  missing, but it somehow transformed to the issue with both wireless
  devices.

  Dmesg after waking up with the issue attached
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kao        2362 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.10
  InstallationDate: Installed on 2018-09-22 (33 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180922)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 012: ID 0489:e0a2 Foxconn / Hon Hai 
   Bus 001 Device 002: ID 0bda:58f4 Realtek Semiconductor Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9370
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic 
root=UUID=34230cbd-d3d2-4cb8-855a-307883bc35ea ro quiet splash 
mem_sleep_default=deep video=1920x1080 usbcore.dyndbg=+p vt.handoff=1
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  RelatedPackageVersions:
   linux-restricted-modules-4.18.0-10-generic N/A
   linux-backports-modules-4.18.0-10-generic  N/A
   linux-firmware                             1.175
  Tags:  cosmic
  Uname: Linux 4.18.0-10-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 08/09/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.5.1
  dmi.board.name: 0VM1FG
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.5.1:bd08/09/2018:svnDellInc.:pnXPS139370:pvr:rvnDellInc.:rn0VM1FG:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 9370
  dmi.product.sku: 07E6
  dmi.sys.vendor: Dell Inc.

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