Backlight brightness cannot be adjusted using keys
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem-5.6 (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
=== SRU Justification ===
[Impact]
PWM backlight doesn't work on Spectre x360 Convertible 13t-aw100.
[Fix]
Use DPCD to control backlight instead of PWM.
[Test]
With this patch applied, user confirmed the issue is fixed.
[Regression Potential]
Low. This is specific to panel ID, which is unique.
=== Original Bug Report ===
I cannot adjust the screen brightness using the keyboard keys or changing /sys/call/
Followed bug report on https:/
1. echo 8 > /sys/class/
2. video.use_
3. Cannot login to when using kernel paramater acpi_osi=. Login does not work and on one boot "y"s were being continuously typed without any keys being depressed. It was odd.
4. video.use_
5. Created file /usr/share/
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-
ProcVersionSign
Uname: Linux 5.3.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D0p: jaredy 1649 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Jan 19 19:51:45 2020
InstallationDate: Installed on 2020-01-03 (16 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: HP HP Spectre x360 Convertible 13t-aw100
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.183.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/15/2019
dmi.bios.vendor: AMI
dmi.bios.version: F.10
dmi.board.
dmi.board.name: 86FA
dmi.board.vendor: HP
dmi.board.version: 87.43
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.
dmi.modalias: dmi:bvnAMI:
dmi.product.family: 103C_5335KV HP Spectre
dmi.product.name: HP Spectre x360 Convertible 13t-aw100
dmi.product.sku: 6YG70AV
dmi.sys.vendor: HP
CVE References
description: | updated |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | New → Fix Committed |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | Fix Committed → Fix Released |
This change was made by a bot.