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[Bug 1397088] Re: No brightness control on imac 27 Core i5-2500S - ubuntu trysty

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apport information

** Tags added: apport-collected trusty

** Description changed:

  Hello,
  
  I have no brightness control on imac 27 Core  i5-2500S (poduct model:
  imac 12.2) running ubuntu trysty with xorg video ati driver.
  
  tried to use fglrx proprietary drivers, and end up with black screen and
  unable to boot.
  
  i only needed to low down brightness a little..
+ --- 
+ ApportVersion: 2.14.1-0ubuntu3.5
+ Architecture: amd64
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC1:  pfmarques   2190 F.... pulseaudio
+  /dev/snd/controlC0:  pfmarques   2190 F.... pulseaudio
+ CRDA:
+  country AW:
+  	(2402 - 2482 @ 40), (N/A, 20)
+  	(5170 - 5250 @ 40), (N/A, 20)
+  	(5250 - 5330 @ 40), (N/A, 20), DFS
+  	(5490 - 5710 @ 40), (N/A, 27), DFS
+ DistroRelease: Ubuntu 14.04
+ HibernationDevice: RESUME=UUID=0c9bef7b-65b8-41bf-9548-6cf11bdd4059
+ InstallationDate: Installed on 2014-11-25 (5 days ago)
+ InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
+ MachineType: Apple Inc. iMac12,2
+ Package: linux (not installed)
+ ProcFB:
+  0 inteldrmfb
+  1 radeondrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-40-generic.efi.signed root=UUID=dba8f74a-366d-4de8-862c-f0118c556c07 ro quiet splash vt.handoff=7
+ ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
+ PulseList:
+  Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
+  No PulseAudio daemon running, or not running as session daemon.
+ RelatedPackageVersions:
+  linux-restricted-modules-3.13.0-40-generic N/A
+  linux-backports-modules-3.13.0-40-generic  N/A
+  linux-firmware                             1.127.8
+ Tags:  trusty
+ Uname: Linux 3.13.0-40-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups:
+  
+ WifiSyslog:
+  Dec  1 11:54:46 pfmarques-iMac wpa_supplicant[992]: message repeated 75 times: [ wlan0: CTRL-EVENT-SCAN-STARTED ]
+  Dec  1 11:54:49 pfmarques-iMac wpa_supplicant[992]: nl80211: send_and_recv->nl_recvmsgs failed: -33
+  Dec  1 11:55:49 pfmarques-iMac wpa_supplicant[992]: wlan0: CTRL-EVENT-SCAN-STARTED 
+  Dec  1 12:01:14 pfmarques-iMac kernel: [ 5030.247003] perf samples too long (2512 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
+  Dec  1 12:08:29 pfmarques-iMac kernel: [ 5465.506679] systemd-hostnamed[7862]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
+ _MarkForUpload: True
+ dmi.bios.date: 01/24/12
+ dmi.bios.vendor: Apple Inc.
+ dmi.bios.version: IM121.88Z.0047.B1F.1201241648
+ dmi.board.name: Mac-942B59F58194171B
+ dmi.board.vendor: Apple Inc.
+ dmi.board.version: iMac12,2
+ dmi.chassis.type: 13
+ dmi.chassis.vendor: Apple Inc.
+ dmi.chassis.version: Mac-942B59F58194171B
+ dmi.modalias: dmi:bvnAppleInc.:bvrIM121.88Z.0047.B1F.1201241648:bd01/24/12:svnAppleInc.:pniMac12,2:pvr1.0:rvnAppleInc.:rnMac-942B59F58194171B:rvriMac12,2:cvnAppleInc.:ct13:cvrMac-942B59F58194171B:
+ dmi.product.name: iMac12,2
+ dmi.product.version: 1.0
+ dmi.sys.vendor: Apple Inc.

** Attachment added: "AlsaInfo.txt"
   https://bugs.launchpad.net/bugs/1397088/+attachment/4272044/+files/AlsaInfo.txt

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https://bugs.launchpad.net/bugs/1397088

Title:
  No brightness control on imac 27 Core  i5-2500S - ubuntu trysty

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  I have no brightness control on imac 27 Core  i5-2500S (poduct model:
  imac 12.2) running ubuntu trysty with xorg video ati driver.

  tried to use fglrx proprietary drivers, and end up with black screen
  and unable to boot.

  i only needed to low down brightness a little..
  --- 
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  pfmarques   2190 F.... pulseaudio
   /dev/snd/controlC0:  pfmarques   2190 F.... pulseaudio
  CRDA:
   country AW:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5170 - 5250 @ 40), (N/A, 20)
   	(5250 - 5330 @ 40), (N/A, 20), DFS
   	(5490 - 5710 @ 40), (N/A, 27), DFS
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=0c9bef7b-65b8-41bf-9548-6cf11bdd4059
  InstallationDate: Installed on 2014-11-25 (5 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Apple Inc. iMac12,2
  Package: linux (not installed)
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-40-generic.efi.signed root=UUID=dba8f74a-366d-4de8-862c-f0118c556c07 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-40-generic N/A
   linux-backports-modules-3.13.0-40-generic  N/A
   linux-firmware                             1.127.8
  Tags:  trusty
  Uname: Linux 3.13.0-40-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  WifiSyslog:
   Dec  1 11:54:46 pfmarques-iMac wpa_supplicant[992]: message repeated 75 times: [ wlan0: CTRL-EVENT-SCAN-STARTED ]
   Dec  1 11:54:49 pfmarques-iMac wpa_supplicant[992]: nl80211: send_and_recv->nl_recvmsgs failed: -33
   Dec  1 11:55:49 pfmarques-iMac wpa_supplicant[992]: wlan0: CTRL-EVENT-SCAN-STARTED 
   Dec  1 12:01:14 pfmarques-iMac kernel: [ 5030.247003] perf samples too long (2512 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
   Dec  1 12:08:29 pfmarques-iMac kernel: [ 5465.506679] systemd-hostnamed[7862]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
  _MarkForUpload: True
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: IM121.88Z.0047.B1F.1201241648
  dmi.board.name: Mac-942B59F58194171B
  dmi.board.vendor: Apple Inc.
  dmi.board.version: iMac12,2
  dmi.chassis.type: 13
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-942B59F58194171B
  dmi.modalias: dmi:bvnAppleInc.:bvrIM121.88Z.0047.B1F.1201241648:bd01/24/12:svnAppleInc.:pniMac12,2:pvr1.0:rvnAppleInc.:rnMac-942B59F58194171B:rvriMac12,2:cvnAppleInc.:ct13:cvrMac-942B59F58194171B:
  dmi.product.name: iMac12,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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