marvin:
1) When you state "I could only adjust it with the terminal and xrandr",
what terminal command and what do you do with xrandr precisely?
2) To clarify, were you able to adjust the screen brightness prior to
Ubuntu 16.10? If so, which specifically and how?
3) To advise, when changing the Status you don't have to change the
Target Package as linux is a reasonable culprit. Having an empty Package
when changing Status is for reports where the the root cause package
isn't known, and nobody has any idea what to do with it.
** Package changed: ubuntu => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Summary changed:
- OLED X1 yoga lenove, screen ubuntu, brightness issue
+ [Lenovo ThinkPad X1 Yoga 1st Gen] Can't change brightness
** Tags removed: regression-potential
** Tags added: kernel-bug-exists-upstream kernel-bug-exists-upstream-v4.17-rc6
regression-release
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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:
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.
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)
---
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
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