Can you please give 20.04 a try?
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1852084
Title:
Backlight brightness not working correctly after waking from Suspend
Mode
Status in linux package in Ubuntu:
Incomplete
Bug description:
The brightness level works correctly, but when the system goes to
sleep mode and then I wake it up, I am not able to increase/decrease
the brightness level using the keyboard controls (Fn + F11/F12), it
works as a On/Off switch pretty much. When it wakes up, the brightness
level is the same level as it was before entering the suspend mode.
But when I try to lower the brightness level (through the keyboard
controls), it completely shuts off, going to the lowest level directly
(pretty much shutting off the screen), even though it is not even
close to that on the slider control. And then, when I increase the
brightness level (on the keyboard), it goes back to the previous
level, working like a On/Off switch instead of a smooth operation.
This looks to be related to the kernel, as the GUI (GNOME) presents
the slider control correctly, but the setting isn't been correctly
applied. On the slider control on the pop-up box on the top right
corner (GNOME 3.34), when I change the level, it works correctly, just
as it should. But, when I try to use the keyboard controls (Fn +
F11/F12), the issue presented previously happens again. The only way
to fix that bug is restarting the system. Again, this just happens
when I put the system in Suspend Mode.
System Info:
1) Description: Ubuntu 19.10
Release: 19.10
2) Hardware:
CPU: AMD Ryzen 5 2500U
GPU: AMD Raven Ridge (Vega 8)
Laptop model: Lenovo IdeaPad 330S (330S-15ARR)
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-19-generic 5.3.0-19.20
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: matheus 1379 F.... pulseaudio
/dev/snd/controlC0: matheus 1379 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov 11 10:06:32 2019
InstallationDate: Installed on 2019-09-22 (49 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: LENOVO 81JQ
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-19-generic
root=UUID=0f9fdad5-0ee7-4039-acba-801eda1522f0 ro iommu=soft quiet splash
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.3.0-19-generic N/A
linux-backports-modules-5.3.0-19-generic N/A
linux-firmware 1.183.1
SourcePackage: linux
UpgradeStatus: Upgraded to eoan on 2019-10-15 (26 days ago)
dmi.bios.date: 05/22/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: 7WCN37WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40679WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 330S-15ARR
dmi.modalias:
dmi:bvnLENOVO:bvr7WCN37WW:bd05/22/2019:svnLENOVO:pn81JQ:pvrLenovoideapad330S-15ARR:rvnLENOVO:rnLNVNB161216:rvrSDK0J40679WIN:cvnLENOVO:ct10:cvrLenovoideapad330S-15ARR:
dmi.product.family: ideapad 330S-15ARR
dmi.product.name: 81JQ
dmi.product.sku: LENOVO_MT_81JQ_BU_idea_FM_ideapad 330S-15ARR
dmi.product.version: Lenovo ideapad 330S-15ARR
dmi.sys.vendor: LENOVO
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