I finally got around to testing the patched kernel and gnome-power- manager from https://launchpad.net/~kamalmostafa/+archive/linux-kamal- mjgbacklight . and that fixes it for me. Full hotkey backlight control. Tested both the 2.6.35 and the 2.6.38 kernel on maverick.
Does this work for anybody else? Anybody it does not work for? ** Description changed: [Status] Happens on Maverick. Tested with 2.6.36 and 2.6.38 (see comment #37) kernel. Happens on Lucid. + + [Workaround/Fix 0] + Install the patched kernel and gnome-power-manager from https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight by adding that ppa to your sources and upgrading your system (for maverick and natty). [Workaround 1] For Acer Extensa 5635Z with bios version V0.3219 or newer adding acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue. [Workaround 2] Write into the "Legacy Backlight Brightness" register (on [8086:2a42] hardware): first make sure you have that hardware ([8086:2a42]) at that address (00:02.0) by looking at the output of lspci -nn|grep VGA then try setpci -s 00:02.0 F4.B=a1 (a1 in the above line is just one example for a brightness value; you can use any two digit hexadecimal value, e.g: 80 for something like half brightness ff for full - better avoid 00 or be prepared for pitch black) + better avoid 00 or be prepared for pitch black) Also see comments #28 and #32. And be careful where you point that setpci command. It might even damage your hardware. [Report] ubuntu lucid-desktop-amd64 20100206 (booting the iso from hd via grub2 loopback) on acer extensa 5635z: the backlight settings are simply ignored. the keys work, the notification works (changing according to the key presses), but the display always stays at the same full brightness. boot with acpi=off: backlight dimming works. 10 levels are available. surprisingly there is no notification. (notification for sound is there) warning: a short press of the power button kills the power immediately! ProblemType: Bug AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2832 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 22' Mixer name : 'Conexant CX20561 (Hermosa)' Components : 'HDA:14f15051,10250253,00100000' Controls : 14 Simple ctrls : 7 Date: Sat Feb 6 11:04:34 2010 DistroRelease: Ubuntu 10.04 LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100206) MachineType: Acer Extensa 5635Z Package: linux-image-2.6.32-12-generic 2.6.32-12.17 ProcCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/hostname/lucid-desktop-amd64.iso noprompt -- ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-12.17-generic Regression: No RelatedPackageVersions: linux-firmware 1.29 Reproducible: Yes SourcePackage: linux TestedUpstream: No Uname: Linux 2.6.32-12-generic x86_64 dmi.bios.date: 05/07/2009 dmi.bios.vendor: Phoenix dmi.bios.version: V0.3213 dmi.board.name: BA50-MV dmi.board.vendor: Acer dmi.board.version: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenix:bvrV0.3213:bd05/07/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A: dmi.product.name: Extensa 5635Z dmi.product.version: Not Applicable dmi.sys.vendor: Acer ** Description changed: [Status] - Happens on Maverick. Tested with 2.6.36 and 2.6.38 (see comment #37) kernel. + Fix for Natty and Maverick exists in https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight . + Happens on Maverick. Tested with 2.6.36 and 2.6.38 (see comment #37) kernel. Tested with 2.6.39rc. Happens on Lucid. [Workaround/Fix 0] Install the patched kernel and gnome-power-manager from https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight by adding that ppa to your sources and upgrading your system (for maverick and natty). [Workaround 1] For Acer Extensa 5635Z with bios version V0.3219 or newer adding acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue. [Workaround 2] Write into the "Legacy Backlight Brightness" register (on [8086:2a42] hardware): first make sure you have that hardware ([8086:2a42]) at that address (00:02.0) by looking at the output of lspci -nn|grep VGA then try setpci -s 00:02.0 F4.B=a1 (a1 in the above line is just one example for a brightness value; you can use any two digit hexadecimal value, e.g: 80 for something like half brightness ff for full better avoid 00 or be prepared for pitch black) Also see comments #28 and #32. And be careful where you point that setpci command. It might even damage your hardware. [Report] ubuntu lucid-desktop-amd64 20100206 (booting the iso from hd via grub2 loopback) on acer extensa 5635z: the backlight settings are simply ignored. the keys work, the notification works (changing according to the key presses), but the display always stays at the same full brightness. boot with acpi=off: backlight dimming works. 10 levels are available. surprisingly there is no notification. (notification for sound is there) warning: a short press of the power button kills the power immediately! ProblemType: Bug AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2832 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 22' Mixer name : 'Conexant CX20561 (Hermosa)' Components : 'HDA:14f15051,10250253,00100000' Controls : 14 Simple ctrls : 7 Date: Sat Feb 6 11:04:34 2010 DistroRelease: Ubuntu 10.04 LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100206) MachineType: Acer Extensa 5635Z Package: linux-image-2.6.32-12-generic 2.6.32-12.17 ProcCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/hostname/lucid-desktop-amd64.iso noprompt -- ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-12.17-generic Regression: No RelatedPackageVersions: linux-firmware 1.29 Reproducible: Yes SourcePackage: linux TestedUpstream: No Uname: Linux 2.6.32-12-generic x86_64 dmi.bios.date: 05/07/2009 dmi.bios.vendor: Phoenix dmi.bios.version: V0.3213 dmi.board.name: BA50-MV dmi.board.vendor: Acer dmi.board.version: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenix:bvrV0.3213:bd05/07/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A: dmi.product.name: Extensa 5635Z dmi.product.version: Not Applicable dmi.sys.vendor: Acer -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/518002 Title: extensa 5635z backlight dimming not working. works with setpci. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
