[Bug 173652] Re: Regression (10.10): Unable to adjust screen brightness on recent Sony Vaio notebooks, Intel GMA adapter

[Michael Doube]

apport information

** Tags added: apport-collected

** Description changed:

  Fn keys don't work for dimming the screen, though they do stimulate the
  sonybright.sh script.
  
  xbacklight works if the notebook has an Intel 965 (x3100) display
  adapter, but is subject to bug #176888 (won't work on Hardy, bad XRandR
  setting).
  
  See bug #95444 for a hack to nvclock which makes it possible to control
  backlight on nVidia 8 series adapters (SPEED mode on the SZ650).
  
  There are 2 problems here:
  1)  The Vaio's LED screen is really very bright when burning at 100% and is hard to look at for any period
  2)  Battery life suffers
  
  Pretty much all the newer Vaios (2007 onwards) have some combination of
  these graphics adapters so this bug should be widespread (and much
  appreciated when fixed!).  A couple of script solutions have been
  proposed in this bug report; please feel free to hack and make
  suggestions.
  
  One solution for notebooks with Intel 965 display adapters is to install
  xbacklight:
  
  ]$ sudo apt-get install xbacklight
  
  Then add these 2 lines to /etc/rc.local (or just execute from the
  command line):
  
  xrandr --output LVDS --set BACKLIGHT_CONTROL native
  /etc/init.d/acpid restart
  
  And edit /etc/acpi/sonybright.sh so that is contains only this:
  
  #!/bin/bash
  if [ "x$1" = "xdown" ]; then
     xbacklight -time 100 -steps 10 -dec 10 2>/tmp/sonybright.log
  elif [ "x$1" = "xup" ]; then
     xbacklight -time 100 -steps 10 -inc 10 2>/tmp/sonybright.log
  else
     echo >&2 Unknown argument $1
  fi
  
  Please note that this will not affect brightness on nVidia 8 series adapters, just Intel adapters.
  Backlight on nVidia adapters is being dealt with in bug #95444, to separate this report from the nVidia report.
+ --- 
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
+ AplayDevices:
+  **** List of PLAYBACK Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ Architecture: amd64
+ ArecordDevices:
+  **** List of CAPTURE Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  mdoube     4509 F.... pulseaudio
+ CRDA: Error: [Errno 2] No such file or directory
+ Card0.Amixer.info:
+  Card hw:0 'Intel'/'HDA Intel at 0xfc500000 irq 48'
+    Mixer name	: 'SigmaTel STAC9872AK'
+    Components	: 'HDA:83847662,104d1e00,00100201 HDA:14f12c06,104d1700,00100000'
+    Controls      : 11
+    Simple ctrls  : 7
+ DistroRelease: Ubuntu 10.10
+ HibernationDevice: RESUME=UUID=a017c7e4-4a29-4ba1-bfea-52cd609781d8
+ InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100412)
+ MachineType: Sony Corporation VGN-SZ650N
+ Package: linux (not installed)
+ PccardctlIdent:
+  Socket 0:
+    no product info available
+ PccardctlStatus:
+  Socket 0:
+    no card
+ ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=31cf7381-5708-4104-8d9e-a2eaaec7cbe7 ro quiet splash
+ ProcEnviron:
+  PATH=(custom, no user)
+  LANG=en_GB.utf8
+  SHELL=/bin/bash
+ ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
+ Regression: Yes
+ RelatedPackageVersions: linux-firmware 1.38
+ Reproducible: Yes
+ RfKill:
+  0: phy0: Wireless LAN
+  	Soft blocked: no
+  	Hard blocked: no
+ Tags: maverick kernel-graphics regression-release needs-upstream-testing
+ Uname: Linux 2.6.35-22-generic x86_64
+ UserGroups:
+  
+ dmi.bios.date: 04/04/2008
+ dmi.bios.vendor: Phoenix Technologies LTD
+ dmi.bios.version: R0122S5
+ dmi.board.asset.tag: N/A
+ dmi.board.name: VAIO
+ dmi.board.vendor: Sony Corporation
+ dmi.board.version: N/A
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Sony Corporation
+ dmi.chassis.version: N/A
+ dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR0122S5:bd04/04/2008:svnSonyCorporation:pnVGN-SZ650N:pvrJ002UR2M:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
+ dmi.product.name: VGN-SZ650N
+ dmi.product.version: J002UR2M
+ dmi.sys.vendor: Sony Corporation

** Attachment added: "AcpiTables.txt"
   https://bugs.edge.launchpad.net/bugs/173652/+attachment/1684036/+files/AcpiTables.txt

-- 
Regression (10.10): Unable to adjust screen brightness on recent Sony Vaio notebooks, Intel GMA adapter
https://bugs.launchpad.net/bugs/173652
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux in ubuntu.