Reset status to New as the requested info has been provided.
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/2081037
Title:
LG Gram screen brightness hot keys and battery charge limit regression
Status in linux package in Ubuntu:
New
Bug description:
I'm running Xubuntu 24.04 with all packages up to date on an LG Gram
14ZD90Q. It's been upgraded in place since 23.04. When I first
installed it, Xubuntu supported the Fn+F2/Fn+F3 screen brightness hot
keys out of the box. They stopped working a couple of weeks ago. It's
hard to pin down an exact cause, but I did install a kernel update
around the same time. Some other Fn+FX hot keys still work (volume
controls and keyboard backlighting). The remaining Fn+FX hot keys
don't work, but I'm not sure whether that's a regression since I
wasn't using them before noticing this bug.
In addition, the battery charge limit threshold is no longer working.
Per the "Battery care limit" instructions at
https://docs.kernel.org/admin-guide/laptops/lg-laptop.html I had set
the charge limit to 80%. Now it no longer has any effect.
```sh
root@gram:~# cat /sys/class/power_supply/CMB0/charge_control_end_threshold
0
root@gram:~# echo 80 >
/sys/class/power_supply/CMB0/charge_control_end_threshold
root@gram:~# cat /sys/class/power_supply/CMB0/charge_control_end_threshold
0
root@gram:~# echo 100 >
/sys/class/power_supply/CMB0/charge_control_end_threshold
root@gram:~# cat /sys/class/power_supply/CMB0/charge_control_end_threshold
0
root@gram:~# echo 50 >
/sys/class/power_supply/CMB0/charge_control_end_threshold
bash: echo: write error: Invalid argument
```
Both of the supported values 80 and 100 are accepted, but don't take
effect. An invalid value throws an error as previously.
This may be related to upstream bug
https://bugzilla.kernel.org/show_bug.cgi?id=204913.
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: pete 1564 F.... pipewire
/dev/snd/controlC0: pete 1564 F.... pipewire
pete 1566 F.... wireplumber
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2023-03-25 (545 days ago)
InstallationMedia: Xubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221018)
MachineType: LG Electronics 14ZD90Q-G.AX56A5
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-45-generic
root=UUID=e4fb412b-8244-40b5-90d3-b873747955a2 ro
ProcVersionSignature: Ubuntu 6.8.0-45.45-generic 6.8.12
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-45-generic N/A
linux-backports-modules-6.8.0-45-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.3
Tags: noble
Uname: Linux 6.8.0-45-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker kvm libvirt lpadmin lxd plugdev sambashare
sudo
_MarkForUpload: False
dmi.bios.date: 08/23/2022
dmi.bios.release: 0.1
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: A1ZG0400 X64
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 14Z90Q
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: 33.0
dmi.modalias:
dmi:bvnPhoenixTechnologiesLtd.:bvrA1ZG0400X64:bd08/23/2022:br0.1:efr33.0:svnLGElectronics:pn14ZD90Q-G.AX56A5:pvr0.1:rvnLGElectronics:rn14Z90Q:rvrFAB1:cvnLGElectronics:ct10:cvr0.1:sku:
dmi.product.family: LG gram PC
dmi.product.name: 14ZD90Q-G.AX56A5
dmi.product.version: 0.1
dmi.sys.vendor: LG Electronics
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