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[Tina Russell <1448485@xxxxxxxxxxxxxxxxxx>]

I'm also getting this problem on my Compaq Presario CQ60. Fn+F7/Fn+F8
don't work to set brightness (though other Fn keycodes generally work),
and in fact I can't seem to find anything to set any value of brightness
at all, and the computer seems to be stuck on the setting of "blindingly
bright." /sys/class/backlight is empty, and the Xorg log doesn't mention
"video" or "light" at all (other than in reporting the "acpi_backlight"
kernel setting I tried; it didn't work). I'm using Ubuntu MATE 16.04.
I'm... not sure how to post my specs, so I'm attaching a HardInfo report
in case it helps :) Let me know if you need any more information, I'd
love to see this bug fixed! (My eyes will thank you!)

** Attachment added: "hardinfo_report.html"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1448485/+attachment/4680722/+files/hardinfo_report.html

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https://bugs.launchpad.net/bugs/1448485

Title:
  [Compaq Presario CQ60-300EO Notebook PC] kernel doesn't recognize
  backlight fn keys

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using Ubuntu 15.04 and fn+f7 and fn+f8 use to lower and higher the brightness of the screen.
  In slackware using kernel 3.14.33 those keys works and give output from acpi_listen.
  In kernel 3.16 to 4.0 those keys don't work and acpi_listen outputs nothing.

  I expected fn+f7 and fn+f8 to work

  https://bugzilla.kernel.org/show_bug.cgi?id=60670
  This bug my be related

  This is my first bug report.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15 [modified: boot/vmlinuz-3.19.0-15-generic]
  ProcVersionSignature: Ubuntu 3.19.0-15.15-lowlatency 3.19.3
  Uname: Linux 3.19.0-15-lowlatency x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  marbangens   1334 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Apr 25 17:04:30 2015
  HibernationDevice: RESUME=UUID=22f95b90-3ec0-4b6d-9e76-13042dc0a290
  InstallationDate: Installed on 2015-04-23 (1 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Hewlett-Packard Compaq Presario CQ60 Notebook PC
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-lowlatency root=UUID=d4f39d6b-137e-4248-81cb-ce920cdee909 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-lowlatency N/A
   linux-backports-modules-3.19.0-15-lowlatency  N/A
   linux-firmware                                1.143
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UdevLog: Error: [Errno 2] Filen eller katalogen finns inte: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/18/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.54
  dmi.board.name: 303C
  dmi.board.vendor: Wistron
  dmi.board.version: 08.60
  dmi.chassis.type: 10
  dmi.chassis.vendor: Wistron
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.54:bd08/18/2009:svnHewlett-Packard:pnCompaqPresarioCQ60NotebookPC:pvrF.54:rvnWistron:rn303C:rvr08.60:cvnWistron:ct10:cvrN/A:
  dmi.product.name: Compaq Presario CQ60 Notebook PC
  dmi.product.version: F.54
  dmi.sys.vendor: Hewlett-Packard

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