LG Gram hangs at black screen on suspend on Ubuntu 23.04

[Andy Pearson]

My laptop is an LG Gram, model number 15Z980-R.AAS9U1. I am running the latest BIOS.

Ever since upgrading to Ubuntu 23.04, my computer frequently hangs upon suspending to RAM and I am not able to recover it. The hang occurs on suspend rather than resume. I have my configuration set to suspend upon closing my laptop's lid. The first time I suspend after boot, it almost always suspends properly and appears to resume with no issues. Starting on the second or third suspend attempt, my computer's screen goes black (backlight off) but it never actually enters suspend state, as indicated by the power LED, processor temperature, and battery drain, which indicate the computer is still on. I am not able to recover the computer to a working state from this point -- it does not respond to any keyboard or touchpad input I have tried, or further closings/openings of the lid, and I need to hold the power button for several seconds to force a hard restart. Once it restarts, the first one or two suspend cycles will work again, and then the pattern continues.

I experienced very infrequent suspend hang problems on 22.10, which were rare enough that I did not troubleshoot them. This problem appeared immediately after upgrading to 23.04. I use the Wayland environment by default but have also tried X11 mode to troubleshoot and the problem seemed to occur there too. Let me know what further troubleshooting would be helpful.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: linux-image-6.2.0-23-generic 6.2.0-23.23
ProcVersionSignature: Ubuntu 6.2.0-23.23-generic 6.2.12
Uname: Linux 6.2.0-23-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: andy 2317 F.... wireplumber
 /dev/snd/seq: andy 2305 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 18 23:00:17 2023
InstallationDate: Installed on 2018-12-01 (1660 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 10a5:0007 FPC FPC Sensor Controller
 Bus 001 Device 003: ID 0bda:562e Realtek Semiconductor Corp. LG Camera
 Bus 001 Device 002: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LG Electronics 15Z980-R.AAS9U1
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-23-generic root=UUID=f2bf5af7-5cc8-4a4f-83e3-1b60fd7b6da7 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-6.2.0-23-generic N/A
 linux-backports-modules-6.2.0-23-generic N/A
 linux-firmware 20230323.gitbcdcfbcf-0ubuntu1.1
SourcePackage: linux
UpgradeStatus: Upgraded to lunar on 2023-04-21 (58 days ago)
dmi.bios.date: 04/02/2018
dmi.bios.release: 0.1
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: K2ZC0254 X64
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 15Z980
dmi.board.vendor: LG Electronics
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LG Electronics
dmi.chassis.version: 0.1
dmi.ec.firmware.release: 63.41
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrK2ZC0254X64:bd04/02/2018:br0.1:efr63.41:svnLGElectronics:pn15Z980-R.AAS9U1:pvr0.1:rvnLGElectronics:rn15Z980:rvrFAB1:cvnLGElectronics:ct10:cvr0.1:sku:
dmi.product.family: Z Series
dmi.product.name: 15Z980-R.AAS9U1
dmi.product.version: 0.1
dmi.sys.vendor: LG Electronics

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Andy Pearson (andyp123)]

This behavior is unchanged in 23.10 -- still the same bug. No such problems in Windows, and no such problem in Ubuntu prior to 23.04.

[Andy Pearson (andyp123)]

This behavior is unchanged in 24.04 -- bug still exists exactly as described. No such problems in Ubuntu prior to 23.04, and no problems with suspend in Windows.