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  18.04 can't adjust brightness on ASUS T300F. Worked fine on 16.04.

Status in linux package in Ubuntu:

Bug description:
  Title of my display under Settings is "Unknown Display".

  I think there's no proper display driver for my laptop in this new
  distribution, "18.04", because the setting for my display works fine
  before I upgrade from 16.04.

  While I said "works fine", I meant, I could use the "fn" button plus
  with the brightness adjusting button, which is "f5" and "f6" on my
  laptop, to adjust the brightness.

  Other than the "fn" combination button not working, I can't even
  adjust the brightness in the setting and inside the main menu bar,
  which I think there might have since a control center is one of the
  features of this version upgrade.

  So, thanks for reading my problem, and please help, otherwise, it's so
  unhealthy for my eyes for looking at a screen with too bright for so
  long and I have to look at the screen for so long.

  Thanks in advance.

  Ps, in case it's needed, the model of my laptop is, ASUS T300F. A
  transform 2-in-one laptop. The fact that my laptop can "transform"
  might be the reason why I got this issue, the drive that serves all
  just fail to meet its needs. I'm sorry.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7.1
  Uname: Linux 4.17.0-041700rc3-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CompizPlugins: No value set for 
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Sep 28 21:44:14 2018
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
   Intel Corporation HD Graphics 5300 [8086:161e] (rev 08) (prog-if 00 [VGA 
     Subsystem: ASUSTeK Computer Inc. HD Graphics 5300 [1043:15fd]
  InstallationDate: Installed on 2018-04-04 (177 days ago)
  InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 
  LightdmDisplayLog: (II) Server terminated successfully (0). Closing log file.
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.17.0-041700rc3-generic 
root=UUID=63fcbd04-ec8b-462c-ba66-4f45c229353c ro quiet splash nomodeset 
  Renderer: Software
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/01/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: T300FA.214
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: T300FA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.product.family: T
  dmi.product.name: T300FA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz 1:
  version.libdrm2: libdrm2 2.4.91-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
  xserver.bootTime: Fri Sep 28 21:43:24 2018
  xserver.configfile: default
   open /dev/dri/card0: No such file or directory
   open /dev/dri/card0: No such file or directory
   Screen 0 deleted because of no matching config section.
   AIGLX: reverting to software rendering
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.19.6-1ubuntu4

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