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[Bug 1256219] Re: [AMD Radeon HD 7500G][1002:990a] Unable to adjust brightness with radeon driver


Po-Hsu Lin, the Raring enablement stack is EoL as per
https://wiki.ubuntu.com/Kernel/LTSEnablementStack . If you update to the
latest, would this still be reproducible?

** Tags added: needs-full-computer-model

** Package changed: linux-lts-raring (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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  [AMD Radeon HD 7500G][1002:990a] Unable to adjust brightness with
  radeon driver

Status in “linux” package in Ubuntu:

Bug description:
  CID: 201307-13904 HP Pavilion 14

  1. Install 12.04.3 + update (3.8.0-33), boot to desktop
  2. Adjust the brightness with hotkeys
  3. Adjust the brightness with the brightness applet.

  Expected results:
  - Brightness could be controlled.

  Actual result:
  - The brightness level indicator will change with hotkeys, but brightness won't be changed, it can't be controlled by the brightness applet as well.

  Debugging information:
  $ ls /sys/class/backlight
  acpi_video0  radeon_bl0

  $ grep -r . /proc/acpi
  /proc/acpi/button/lid/LID/state:state:      open
  grep: /proc/acpi/event: Permission denied
  /proc/acpi/wakeup:Device	S-state	  Status   Sysfs node
  /proc/acpi/wakeup:PB5	  S5	*disabled  pci:0000:00:05.0
  /proc/acpi/wakeup:XPDV	  S5	*enabled   pci:0000:03:00.0
  /proc/acpi/wakeup:OHC1	  S3	*enabled   pci:0000:00:12.0
  /proc/acpi/wakeup:OHC2	  S3	*enabled   pci:0000:00:13.0
  /proc/acpi/wakeup:EHC1	  S3	*enabled   pci:0000:00:12.2
  /proc/acpi/wakeup:EHC2	  S3	*enabled   pci:0000:00:13.2
  /proc/acpi/wakeup:XHC0	  S3	*enabled   pci:0000:00:10.0
  /proc/acpi/wakeup:KBC0	  S3	*enabled   pnp:00:06
  /proc/acpi/wakeup:PS2M	  S3	*disabled  pnp:00:07

  $ cat /proc/version
  Linux version 3.8.0-33-generic (buildd@toyol) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #48~precise1-Ubuntu SMP Thu Oct 24 16:28:06 UTC 2013

  After the proprietary AMD video driver (fglrx-experimental-13) was installed, the brightness could be controlled normally.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.8.0-33-generic 3.8.0-33.48~precise1
  ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic
  Uname: Linux 3.8.0-33-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 1: Generic [HD-Audio Generic], device 0: ALC282 Analog [ALC282 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC1:  ubuntu     1779 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1779 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
   Card hw:0 'HDMI'/'HDA ATI HDMI at 0xf0344000 irq 46'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100300'
     Controls      : 7
     Simple ctrls  : 1
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
   Card hw:1 'Generic'/'HD-Audio Generic at 0xf0340000 irq 16'
     Mixer name	: 'Realtek ALC282'
     Components	: 'HDA:10ec0282,103c2169,00100003'
     Controls      : 20
     Simple ctrls  : 9
  Date: Fri Nov 29 02:35:10 2013
  HibernationDevice: RESUME=UUID=803edd91-ef6d-41c5-835c-65db44b01055
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
   eth0      no wireless extensions.
   lo        no wireless extensions.
  MachineType: Hewlett-Packard HP Pavilion 14 Notebook PC
  MarkForUpload: True
   PATH=(custom, no user)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-33-generic root=UUID=e37c0bc3-93c5-4bcf-9e05-8d76ddb1455a ro quiet splash
   linux-restricted-modules-3.8.0-33-generic N/A
   linux-backports-modules-3.8.0-33-generic  N/A
   linux-firmware                            1.79.7
  SourcePackage: linux-lts-raring
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/12/2013
  dmi.bios.vendor: Insyde
  dmi.bios.version: B.0C
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 2169
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 30.0F
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsyde:bvrB.0C:bd07/12/2013:svnHewlett-Packard:pnHPPavilion14NotebookPC:pvr088E100000005910000630100:rvnHewlett-Packard:rn2169:rvr30.0F:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion 14 Notebook PC
  dmi.product.version: 088E100000005910000630100
  dmi.sys.vendor: Hewlett-Packard

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