You have been subscribed to a public bug: When booting the system normally, the FN+Home (Brightness Up) and FN+End (Brightness down) hotkeys work perfectly. However, after hibernating or suspending, nothing happens when these keys are pressed. Also doing: echo "X" > /proc/acpi/video/VID/LCD0/brightness does not work. When pressing the hotkeys, I can see the value of this proc entry change correctly though.
I can still change the screen brightness by switching to a terminal using CTRL+ALT+F1, and use the brightness hotkeys there, and then switch back to the X session. It is like the brightness value is being changed in the system, but the event is not signalled to the screen. For example if I use the hotkeys to change to brightness value from full to lowest, and then go to the terminal and use the hotkey, the screen immediatly jumps from full brightness to lowest brightness (eg. stored value is applied). Also if the screen is on full brightness, and I adjust the brightness to lowest and reboot, the system will boot up with low brightness. Eg. the brightness value I see in /proc/acpi/video/VID/LCD0/brightness is applied to the screen after reboot. Machine: Lenovo W510 ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: linux-image-2.6.32-24-generic 2.6.32-24.38 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.32-24.38-generic 2.6.32.15+drm33.5 Uname: Linux 2.6.32-24-generic i686 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic] Subdevices: 1/1 Subdevice #0: subdevice #0 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dvdw 1707 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 17' Mixer name : 'Conexant ID 5069' Components : 'HDA:14f15069,17aa218b,00100302' Controls : 6 Simple ctrls : 4 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16' Mixer name : 'Nvidia ID a' Components : 'HDA:10de000a,10de0101,00100100' Controls : 0 Simple ctrls : 0 Card1.Amixer.values: Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT37WW-1.12' Mixer name : 'ThinkPad EC 6MHT37WW-1.12' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Wed Aug 4 22:51:33 2010 HibernationDevice: RESUME=UUID=e9cae751-6db3-47a6-b967-731f28d4c7cd InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429) MachineType: LENOVO 431929G ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=5ba053dc-ef1e-4c23-889b-bc8464782a47 ro quiet splash resume=UUID=443a06ea-be9c-4e68-872a-16c3633eb88a ProcEnviron: LANGUAGE=en LANG=nl_BE.utf8 SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.34.1 SourcePackage: linux dmi.bios.date: 05/18/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6NET57WW (1.20 ) dmi.board.name: 431929G dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6NET57WW(1.20):bd05/18/2010:svnLENOVO:pn431929G:pvrThinkPadW510:rvnLENOVO:rn431929G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 431929G dmi.product.version: ThinkPad W510 dmi.sys.vendor: LENOVO ** Affects: nvidia-graphics-drivers (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: apport-bug hibernate i386 lucid needs-upstream-testing regression-potential resume -- Adjusting brightness broken after hibernate/suspend https://bugs.launchpad.net/bugs/613638 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp