The above post helped me to set backlight dimmer on my Asus EEEPC 1101HA, running ubuntu 12.04. But the commands have to be changed somewhat to actually change the file /sys/class/backlight/psb-bl/brightness
2) chmod 666 /sys/class/backlight/psb-bl/brightness to give yourself permission to read/write (711 actually only gives execute permission) 3) Using a text editor (I use vi) gives Fsync errors (/sys is not a normal filesystem), so use the shell to write to the "file" instead: First choose the number, for example 50. The command is: echo 50 >| /sys/class/backlight/psb-bl/brightness 4) done. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/429942 Title: ASUS 1101HA brightness hotkeys don't work, generate ACPI errors Status in “acpi-support” package in Ubuntu: Fix Released Status in “linux” package in Ubuntu: Incomplete Bug description: Hi, some of the hotkeys don't work correct. I'm using Ubuntu UNR 9.04. The keyboard layout is set to Asus-Laptop (the installer set it to Generic 105 (itel) I think) but ther is no change. Correct are: Fn+F1: Hibranate Fn+F7: disable display backlight Fn+F10,F11,F12: audio volume keys Fn+Space: wake-up Fn+Arrowkeys: Page up/down, end, pos1 Fn+Insert: Numlock Wrong is: Fn+F8: it should enable or disable the VGA output ... instead it increases audio volume (just like Fn+F12) Nonefunctional are: Fn+F2: Disable Wlan/Bluetooth Fn+F3: Disable touthpad Fn+F4: toggle fullscreen Fn+F6,F7: Display brightnes/backlight control Fn+F9: open taskmanager (in MS Win) also nonefunctional is the extra buttom on the left above the keybord to disable touchpad. --Fn+F2--Wlan-- for this key I get in 'xev': xev | grep keycode request MappingKeyboard, first_keycode 8, count 247 state 0x0, keycode 246 (keysym 0x1008ff95, XF86WLAN), same_screen YES, state 0x0, keycode 246 (keysym 0x1008ff95, XF86WLAN), same_screen YES, and acpi_listen: hotkey ATKD 00000010 00000024 ---------------------- --Fn+F3/additional Touchpadkey-- nothing in xev but in acpi_listen: hotkey ATKD 00000037 00000009 hotkey ATKD 00000037 0000000a ---------------------- --Fn+F4-toggle Fulscreen-- nothing in xev acpi_listen: hotkey ATKD 00000038 00000006 ---------------------------------- --Fn+F5-decreas display-brightness/backlight-- nothing in xev and acpi_listen, but these messages in dmesg: [ 2684.513714] ACPI Exception (exoparg2-0444): AE_AML_PACKAGE_LIMIT, Index (000000010) is beyond end of object [20080926] [ 2684.513767] ACPI Error (psparse-0524): Method parse/execution failed [\_SB_.PCI0.SBRG.EC0_._Q0B] (Node f6c18900), AE_AML_PACKAGE_LIMIT --------------------------------- --Fn+F6-increas display-brightness/backlight-- nothing in xev and acpi_listen, but these messages in dmesg: [ 2844.889690] ACPI Exception (exoparg2-0444): AE_AML_PACKAGE_LIMIT, Index (000000010) is beyond end of object [20080926] [ 2844.889743] ACPI Error (psparse-0524): Method parse/execution failed [\_SB_.PCI0.SBRG.EC0_._Q0D] (Node f6c18918), AE_AML_PACKAGE_LIMIT -------------------------------- --Fn+F8-VGA-Output-- xev | grep keycode request MappingKeyboard, first_keycode 8, count 247 request MappingKeyboard, first_keycode 8, count 248 request MappingKeyboard, first_keycode 8, count 247 sudo acpi_listen hotkey ATKD 00000030 00000006 ----------------------------- --Fn+F9-Taskmanager-- xev | grep keycode request MappingKeyboard, first_keycode 8, count 247 state 0x0, keycode 156 (keysym 0x1008ff41, XF86Launch1), same_screen YES, state 0x0, keycode 156 (keysym 0x1008ff41, XF86Launch1), same_screen YES, sudo acpi_listen hotkey ATKD 00000012 00000007 ------------------------------ That's what I got. If you need anything else then tell me. THX --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: MID [HDA Intel MID], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: MID [HDA Intel MID], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2824 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'MID'/'HDA Intel MID at 0xf3f38000 irq 23' Mixer name : 'Realtek ALC269' Components : 'HDA:10ec0269,104383ce,00100004' Controls : 12 Simple ctrls : 7 DistroRelease: Ubuntu 10.04 LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318) MachineType: ASUSTeK Computer INC. 1101HA Package: linux (not installed) ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=de console-setup/layoutcode?=de ProcEnviron: LANG=de_DE.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-16.25-generic Regression: Yes RelatedPackageVersions: linux-firmware 1.32 Reproducible: Yes Tags: lucid needs-upstream-testing regression-potential TestedUpstream: No Uname: Linux 2.6.32-16-generic i686 UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare dmi.bios.date: 12/01/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0323 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: 1101HA dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: x.xx dmi.chassis.asset.tag: 0x00000000 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTek Computer INC. dmi.chassis.version: x.x dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0323:bd12/01/2009:svnASUSTeKComputerINC.:pn1101HA:pvrx.x:rvnASUSTeKComputerINC.:rn1101HA:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x: dmi.product.name: 1101HA dmi.product.version: x.x dmi.sys.vendor: ASUSTeK Computer INC. 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