Comment 30 for bug 1768208

Ok. Here the result:

assuming you only need the log files.

Executed as stated:

   -

   ls /sys/class/backlight > backlight
   -

   grep -r . /proc/acpi > acpi
   -

   sudo acpidump -o acpidump.txt
   -

   acpixtract acpidump.txt
   - Please note this must be done after the prior command, as it uses the
      newly created acpidump.txt, in order to produce the files to attach
      DSDT.dat, SSDT1.dat, SSDT2.dat, and SSDT3.dat.
   -

   iasl -d DSDT.dat
   - Please note this must be done after the prior command, as it uses the
      newly created DSDT.dat to create the file to attach DSDT.dsl.
   -

   sudo fwts > fwts
   -

   sudo fwts method > fwts_method
   -

   sudo dmidecode > dmidecode.log

On Mon, May 28, 2018 at 9:43 PM, Christopher M. Penalver <
<email address hidden>> wrote:

> marvin:
>
> 1) Regarding the scaling and mouse issues, these are outside the scope of
> this report. Hence, feel free to file a separate report about each one by
> ensuring you have the package xdiagnose installed, and that you click the
> Yes button for attaching additional debugging information via a terminal:
> ubuntu-bug xorg
>
> 2) Regarding the scope of this report, could you please provide the
> missing information from
> https://wiki.ubuntu.com/Kernel/Debugging/Backlight?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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
>
> WORKAROUND: Execute at a terminal:
> xrandr --output eDP-1 --scale 1.25x1.25 --brightness 0.8
>
> ---
> 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
>