What's the kernel version you used in Gentoo? -- 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/1768152
Title: Brightness controll doesn't work - Samsung R560 Status in linux package in Ubuntu: Confirmed Bug description: Hi, I just migrated from Gentoo Linux to KUbuntu 18.04 LTS. Now I noticed that brightness control doesn't work in Ubuntu (FN Keys show KDE Dialog Brightness changed but display stays at full Backlight). Even writing to /sys/class/backlight/acpi_video0/brightness doesn't change the brightness level. In Gentoo everything was working fine, display backlight responded to KDE and/or to /sys/class/backlight/... . As I now I had a bug Ticket at Kernel org with user Tux12Fun an it was implemented long time ago into the Kernel Main Line. But I can't find the Ticket on Kernel.org now :-( So I try to provide all the information i can collect from the old installation. Hardware: Samsung R560 Laptop Model: NP-R560-AS05DE Gentoo Kernel: linux-4.4.67-gentoo Gentoo Video Driver: original Nvidia 340.106 with Gentoo Kernel Patch nvidia-drivers-381.09-v3.patch Ubuntu Kernel: 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux Ubuntu Video Driver: NVidia 390.42 root@rechner4:/# lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 lspci -vvv attached. Kernel Config of my old Gentoo attached. I hope we can mange it to get backlight control working on Ubuntu as it's nearly inpossible to work with full backlight at night :-( Thank you for your work. Best regards form Bavaria Tux12Fun (Thomas) --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: thomas 1205 F.... pulseaudio CurrentDesktop: KDE DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-04-30 (0 days ago) InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: SAMSUNG ELECTRONICS CO., LTD. R560 NonfreeKernelModules: nvidia Package: linux (not installed) ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=7ca20d22-7baa-4892-a8a3-cd0e628190bc ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/09/2008 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 09LA.7027.20081209.JJC dmi.board.name: R560 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr09LA.7027.20081209.JJC:bd12/09/2008:svnSAMSUNGELECTRONICSCO.,LTD.:pnR560:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR560:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A: dmi.product.name: R560 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768152/+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
