Marked as Incomplete for request in comment #3 Please change it back to confirmed after pasting the debug result. Thanks
** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1867060 Title: no brightness control support on Aspire A715-72G Status in linux package in Ubuntu: Incomplete Bug description: Brightness disappear, no entries in /sys/class/backlight ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.3.0-40-generic 5.3.0-40.32 ProcVersionSignature: Ubuntu 5.3.0-40.32-generic 5.3.18 Uname: Linux 5.3.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: brian 1822 F.... pulseaudio /dev/snd/controlC1: brian 1822 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Thu Mar 12 03:10:15 2020 InstallationDate: Installed on 2020-03-10 (1 days ago) InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 04f3:0c03 Elan Microelectronics Corp. ELAN:Fingerprint Bus 001 Device 002: ID 0408:a060 Quanta Computer, Inc. HD WebCam Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Acer Aspire A715-72G ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-40-generic root=UUID=405a07bf-f671-40e7-984b-b478fb7b70e3 ro quiet splash nomodeset acpi_backlight=video vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.3.0-40-generic N/A linux-backports-modules-5.3.0-40-generic N/A linux-firmware 1.183.4 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/05/2019 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.28 dmi.board.asset.tag: Type2 - Board Serial Number dmi.board.name: Charmeleon_CFS dmi.board.vendor: CFL dmi.board.version: V1.28 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.28 dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.28:bd08/05/2019:svnAcer:pnAspireA715-72G:pvrV1.28:rvnCFL:rnCharmeleon_CFS:rvrV1.28:cvnAcer:ct10:cvrV1.28: dmi.product.family: Aspire 7 dmi.product.name: Aspire A715-72G dmi.product.sku: 0000000000000000 dmi.product.version: V1.28 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1867060/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp