[Bug 1799988] Re: Missing wifi and bluetooth after sleep on XPS 9370

I am also experiencing the same issue with on a Dell XPS 13 9370 that I
upgraded to 18.04. I added mem_sleep_default=deep to my grub boot
options to workaround the battery drainage when "suspended". Just like
other people, I can't seem to figure out a pattern to reproduce the
issue with 100% certainty. I checked and the BIOS is up to date, and my
wifi firmware is WLAN.RM.4.4.1-00079-QCARMSWPZ-1.

When the problem happens, the only way I can get wifi back is to reboot
or shutdown + boot, sometimes it takes more than one reboot to get wifi
back up. For some reason, a complete shutdown + boot appears to work
better than a simple reboot.

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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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