Hi, I still have this issue. Using Ubuntu 18.04 on Dell XPS 9570. Any way to get a workaround for that?
-- 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/847001 Title: Adjusting display brightness is very slow on several Dell laptops Status in linux package in Ubuntu: Confirmed Bug description: Changing the brightness via FN key combination or via the brightness applet is very slow. the CPUs don't seem to go to 100%, but the adjustment process seems relatively slow. The mouse cursor is also sluggish. Reinstalled the OS twice, but not because of this issue and the problem seems to persist. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: gnome-power-manager 2.32.0-2ubuntu2.1 ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 188.8.131.52 Uname: Linux 2.6.38-11-generic x86_64 Architecture: amd64 Date: Sun Sep 11 15:29:02 2011 GnomeSessionIdleInhibited: No GnomeSessionInhibitors: None GnomeSessionSuspendInhibited: No InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427) MachineType: Dell Inc. Latitude E5410 ProcEnviron: LANGUAGE=en_US:en LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=0dfaacc9-c19d-425b-963d-dabb87ae18bc ro quiet splash vt.handoff=7 SourcePackage: gnome-power-manager UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/28/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 05C67D dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA09:bd01/28/2011:svnDellInc.:pnLatitudeE5410:pvr0001:rvnDellInc.:rn05C67D:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E5410 dmi.product.version: 0001 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/847001/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp