marvin: Regarding xrandr, one may use it in 18.04 as per below. Were you stating that when you attempt to use the command that it worked in 16.04, but the same command doesn't work in 18.04?
xrandr Screen 0: minimum 320 x 200, current 1288 x 703, maximum 16384 x 16384 VGA-1 connected primary 1288x703+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1288x703 59.93*+ 2560x1600 59.99 59.97 1920x1440 60.00 1856x1392 60.00 1792x1344 60.00 2048x1152 60.00 1920x1200 59.88 59.95 1920x1080 60.00 1600x1200 60.00 1680x1050 59.95 59.88 1400x1050 59.98 59.95 1600x900 60.00 1280x1024 60.02 1440x900 59.89 59.90 1280x960 60.00 1366x768 59.79 60.00 1360x768 60.02 1280x800 59.81 59.91 1280x768 59.87 59.99 1280x720 60.00 1024x768 60.00 800x600 60.32 56.25 848x480 60.00 640x480 59.94 ** Description changed: - As with all the proceeding distros from ubuntu 16.10 the brightness of the OLED screen canot be set. Since xrander is no more present there is also no hack around this problem anymore. This bug is a killer for using the system as full brightness drains the battery quickly. - OLED screens have no backlight, thus this might be the issue. + The screen brightness cannot be changed. - ProblemType: Bug - DistroRelease: Ubuntu 18.04 - Package: linux-image-4.15.0-20-generic 4.15.0-20.21 - ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 - Uname: Linux 4.15.0-20-generic x86_64 - ApportVersion: 2.20.9-0ubuntu7 - Architecture: amd64 - CurrentDesktop: ubuntu:GNOME - Date: Tue May 1 10:45:56 2018 - SourcePackage: linux-signed - UpgradeStatus: No upgrade log present (probably fresh install) - --- + In 16.04, I could change the brightness via: + xrandr --output eDP-1 --brightness 0.7 + + --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: marvin 1768 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: marvin 1768 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=e81e811a-12aa-465d-ba3c-77e34b171b69 MachineType: LENOVO 20FRS2M600 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz root=/dev/nvme0n1p1 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 + 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: 06/23/2016 dmi.bios.vendor: LENOVO dmi.bios.version: N1FET41W (1.15 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FRS2M600 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1FET41W(1.15):bd06/23/2016:svnLENOVO:pn20FRS2M600:pvrThinkPadX1Yoga1st:rvnLENOVO:rn20FRS2M600:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Yoga 1st dmi.product.name: 20FRS2M600 dmi.product.version: ThinkPad X1 Yoga 1st dmi.sys.vendor: LENOVO -- 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/1768208 Title: [Lenovo ThinkPad X1 Yoga 1st Gen] Can't change brightness Status in linux package in Ubuntu: Incomplete Bug description: The screen brightness cannot be changed. In 16.04, I could change the brightness via: xrandr --output eDP-1 --brightness 0.7 --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: marvin 1768 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=e81e811a-12aa-465d-ba3c-77e34b171b69 MachineType: LENOVO 20FRS2M600 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz root=/dev/nvme0n1p1 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: 06/23/2016 dmi.bios.vendor: LENOVO dmi.bios.version: N1FET41W (1.15 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FRS2M600 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1FET41W(1.15):bd06/23/2016:svnLENOVO:pn20FRS2M600:pvrThinkPadX1Yoga1st:rvnLENOVO:rn20FRS2M600:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Yoga 1st dmi.product.name: 20FRS2M600 dmi.product.version: ThinkPad X1 Yoga 1st dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768208/+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
