I can't replicate it since the report. I have no idea why, maybe the
Ubuntu releases patched it. I haven't changed anything that should have
fixed this, to my knowledge, but it just woke up again with wifi OK.

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https://bugs.launchpad.net/bugs/1785319

Title:
  All kinds of problems on wake from lid close 18.04

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This seems to be multiple packages, Ubuntu 18.04 itself (because 17.10
  and all previous versions worked fine), and firmware.

  When wake from lid close, GUI freezes up and un-freezes every few
  seconds.

  Wifi won't even scan for networks, much less join one.

  Probably more things are wrong, but that's what's visible to me.

  Here's dmesg recent errors:

  [43548.249307] ath10k_warn: 129 callbacks suppressed
  [43548.249309] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.285609] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.316369] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.347057] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.382893] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.419305] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.455788] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.492277] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.523109] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43548.553793] ath10k_pci 0000:02:00.0: failed to wake target for read32 at 
0x0003a028: -110
  [43551.161054] ath10k_pci 0000:02:00.0: failed to read device register, 
device is gone
  [43551.270391] ath10k_pci 0000:02:00.0: firmware crashed! (guid 
c2f1d8ad-ba2b-4c87-a0e1-9dff072ac468)
  [43551.270394] ath10k_pci 0000:02:00.0: qca6174 hw3.2 target 0x05030000 
chip_id 0x00340aff sub 1a56:1535
  [43551.270396] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 1 tracing 1 
dfs 0 testmode 0
  [43551.270803] ath10k_pci 0000:02:00.0: firmware ver 
WLAN.RM.4.4.1-00079-QCARMSWPZ-1 api 6 features wowlan,ignore-otp crc32 fd869beb
  [43551.271233] ath10k_pci 0000:02:00.0: board_file api 2 bmi_id N/A crc32 
20d869c3
  [43551.271235] ath10k_pci 0000:02:00.0: htt-ver 3.47 wmi-op 4 htt-op 3 cal 
otp max-sta 32 raw 0 hwcrypto 1
  [43551.271242] ath10k_pci 0000:02:00.0: failed to read firmware dump area: -28
  [43551.271243] ath10k_pci 0000:02:00.0: Copy Engine register dump:
  [43551.417001] ath10k_pci 0000:02:00.0: [00]: 0x00034400 4294967295 
4294967295 4294967295 4294967295
  [43551.562682] ath10k_pci 0000:02:00.0: [01]: 0x00034800 4294967295 
4294967295 4294967295 4294967295
  [43551.708407] ath10k_pci 0000:02:00.0: [02]: 0x00034c00 4294967295 
4294967295 4294967295 4294967295
  [43551.841610] ath10k_pci 0000:02:00.0: [03]: 0x00035000 4294967295 
4294967295 4294967295 4294967295
  [43551.975925] ath10k_pci 0000:02:00.0: [04]: 0x00035400 4294967295 
4294967295 4294967295 4294967295
  [43552.108938] ath10k_pci 0000:02:00.0: [05]: 0x00035800 4294967295 
4294967295 4294967295 4294967295
  [43552.254895] ath10k_pci 0000:02:00.0: [06]: 0x00035c00 4294967295 
4294967295 4294967295 4294967295
  [43552.400652] ath10k_pci 0000:02:00.0: [07]: 0x00036000 4294967295 
4294967295 4294967295 4294967295
  [43552.400689] ath10k_pci 0000:02:00.0: failed to reset chip: -5
  [43552.400690] ath10k_pci 0000:02:00.0: Could not init hif: -5
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tom        1383 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-04-26 (103 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180228)
  MachineType: Dell Inc. XPS 15 9560
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-30-generic 
root=UUID=9ccc05c8-ea98-4229-a4d3-6d3a292df6df ro quiet splash 
acpi_rev_override=5 nouveau.modeset=0 enable_psr=1 disable_power_well=0 
pci=noaer pcie_aspm=force nmi_watchdog=0 nouveau.runpm=0 vt.handoff=1
  ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-30-generic N/A
   linux-backports-modules-4.15.0-30-generic  N/A
   linux-firmware                             1.173.1
  Tags:  bionic
  Uname: Linux 4.15.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.9.4
  dmi.board.name: 0JHP5H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.9.4:bd04/23/2018:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn0JHP5H:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 15 9560
  dmi.sys.vendor: Dell Inc.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gdm         938 F.... pulseaudio
                        tom        1383 F.... pulseaudio
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-04-26 (103 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180228)
  MachineType: Dell Inc. XPS 15 9560
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-30-generic 
root=UUID=9ccc05c8-ea98-4229-a4d3-6d3a292df6df ro quiet splash 
acpi_rev_override=5 nouveau.modeset=0 enable_psr=1 disable_power_well=0 
pci=noaer pcie_aspm=force nmi_watchdog=0 nouveau.runpm=0 vt.handoff=1
  ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not 
accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-30-generic N/A
   linux-backports-modules-4.15.0-30-generic  N/A
   linux-firmware                             1.173.1
  Tags:  bionic
  Uname: Linux 4.15.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 04/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.9.4
  dmi.board.name: 0JHP5H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.9.4:bd04/23/2018:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn0JHP5H:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 15 9560
  dmi.sys.vendor: Dell Inc.

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