I performed a test with linux-image-5.6.0-1007-oem from focal-proposed. The brightness control works without problem on that version. So the problem seems to be fixed on linux-oem-5.6.
Is the version going to make it to the focal release? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.4 in Ubuntu. https://bugs.launchpad.net/bugs/1871330 Title: Dell XPS 13 (7390) brightness is not adjustable with recent kernel update Status in linux-oem-5.4 package in Ubuntu: Won't Fix Status in linux-oem-5.6 package in Ubuntu: Incomplete Bug description: uname -a shows: Linux rocinante 5.4.0-1002-oem #4-Ubuntu SMP Wed Jan 15 10:44:42 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux I believe this bug is related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1862835 and https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1858844 This was broken then began working with kernel 5.4.0-18 however it is now broken again. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-1002-oem 5.4.0-1002.4 ProcVersionSignature: Ubuntu 5.4.0-1002.4-oem 5.4.8 Uname: Linux 5.4.0-1002-oem x86_64 ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chasinglogic 17213 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Tue Apr 7 09:55:19 2020 InstallationDate: Installed on 2020-04-06 (1 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) MachineType: Dell Inc. XPS 13 7390 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-1002-oem root=UUID=bf15f889-42e1-4e25-b73e-4b05806483ae ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-1002-oem N/A linux-backports-modules-5.4.0-1002-oem N/A linux-firmware 1.187 SourcePackage: linux-oem-5.4 UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 11/25/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.4.0 dmi.board.name: 0377MH dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.4.0:bd11/25/2019:svnDellInc.:pnXPS137390:pvr:rvnDellInc.:rn0377MH:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 7390 dmi.product.sku: 0962 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem-5.4/+bug/1871330/+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
