This bug was fixed in the package linux-oem - 4.15.0-1050.57
---------------
linux-oem (4.15.0-1050.57) bionic; urgency=medium
* bionic/linux-oem: 4.15.0-1050.57 -proposed tracker (LP: #1839261)
* Packaging resync (LP: #1786013)
- [Packaging] update helper scripts
[ Ubuntu: 4.15.0-58.64 ]
* unable to handle kernel NULL pointer dereference at 000000000000002c (IP:
iget5_locked+0x9e/0x1f0) (LP: #1838982)
- Revert "ovl: set I_CREATING on inode being created"
- Revert "new primitive: discard_new_inode()"
-- Chia-Lin Kao (AceLan) <acelan....@canonical.com> Wed, 07 Aug 2019
18:14:17 +0800
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https://bugs.launchpad.net/bugs/1808957
Title:
Dell XPS 13 (9370) defaults to s2idle sleep/suspend instead of deep,
NVMe drains lots of power under s2idle
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem package in Ubuntu:
Confirmed
Status in linux-oem-osp1 package in Ubuntu:
Confirmed
Status in linux source package in Bionic:
Fix Released
Status in linux-oem source package in Bionic:
Fix Released
Status in linux-oem-osp1 source package in Bionic:
Fix Released
Status in linux source package in Cosmic:
Fix Committed
Status in linux-oem source package in Cosmic:
Invalid
Status in linux-oem-osp1 source package in Cosmic:
Invalid
Status in linux source package in Disco:
Fix Released
Status in linux-oem source package in Disco:
Fix Released
Status in linux-oem-osp1 source package in Disco:
Fix Released
Bug description:
It seems that the Dell 9370 is set to go into s2idle mode rather than
deep sleep, forgoing significant power savings.
I have confirmed this by suspending and then checking:
sudo journalctl | grep "PM: suspend" | tail -2. If the output is
PM: suspend entry (s2idle)
PM: suspend exit
cat /sys/power/mem_sleep showed
[s2idle] deep
As a temporary fix, I typed
echo deep > /sys/power/mem_sleep
as a root user (sudo -i).
Then the output of cat /sys/power/mem_sleep was
s2idle [deep]
After suspending now,
sudo journalctl | grep "PM: suspend" | tail -2 returns
PM: suspend entry (deep)
PM: suspend exit
I have made this permanent by editing
/etc/default/grub
and replacing
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
with
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mem_sleep_default=deep"
then regenerating my grub configuration (sudo grub-mkconfig -o
/boot/grub/grub.cfg).
This appears to be working with no ill effects.
Credit to https://askubuntu.com/a/1036122/470077
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-11-generic 4.18.0-11.12
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: aaron-work 3672 F.... pulseaudio
/dev/snd/pcmC0D0p: aaron-work 3672 F...m pulseaudio
Date: Tue Dec 18 09:52:44 2018
EcryptfsInUse: Yes
HibernationDevice: RESUME=/dev/ubuntu-vg/swap_1
InstallationDate: Installed on 2018-09-04 (104 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: 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
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-11-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash mem_sleep_default=deep
vt.handoff=1
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-4.18.0-11-generic N/A
linux-backports-modules-4.18.0-11-generic N/A
linux-firmware 1.175.1
SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-10-26 (52 days ago)
dmi.bios.date: 08/09/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.5.1
dmi.board.name: 0F6P3V
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.:rn0F6P3V: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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