Binary package hint: xorg
This is on an Asus K50IJ laptop with Intel GMA X4500HD graphics. In the previous release (Karmic), the LCD brightness adjustment both on the keyboard, as well as the auto-dim for power save, worked flawlessly. As of today (April 7th, 2010) with all updates run, this still does not function for me in Lucid. The hotkey press does invoke the onscreen display that shows that an adjustment should be taking place, although it has a definite delay for subsequent presses. The actual screen brightness, however, does not change.
Needless to say, this also effects battery life. In Karmic, I was able to run about 3 hours on battery, now I can get right at about 2 hours, presumably due to the extra battery consumption necessary to run the screen without being able to reduce brightness.
The output of lshw is attached, hope this helps.
Thanks
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+3ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
Architecture: i386
Date: Wed Apr 7 15:59:10 2010
DkmsStatus: Error: [Errno 2] No such file or directory
GdmLog1:
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
MachineType: ASUSTeK Computer Inc. K50IJ
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-19-generic root=UUID=c2815e8b-bd9b-45fd-86bd-f2454ecf3751 ro quiet splash
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
dmi.bios.date: 12/04/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 217
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K50IJ
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr217:bd12/04/2009:svnASUSTeKComputerInc.:pnK50IJ:pvr1.0:rvnASUSTeKComputerInc.:rnK50IJ:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: K50IJ
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
glxinfo: Error: [Errno 2] No such file or directory
system:
distro: Ubuntu
codename: lucid
architecture: i686
kernel: 2.6.32-19-generic
[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09)
Subsystem: ASUSTeK Computer Inc. Device [1043:1862]
Same problem here on an Asus P50IJ. Once I press the backlight function keys I am also unable to use any of the other function keys like volume as well. Its as if it causes the whole system that deals with the fn keys/notification to lock up or slow way down. Adjusting the slider in the volume control applet still works however. Also the Brightness Applet does not work either. It will open but when the slider is clicked it just disappears.