Alkis Georgopoulos, as per http://us.acer.com/ac/en/US/content/drivers an update is available for your BIOS (1.30). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Changed in: linux (Ubuntu) Status: Triaged => Incomplete -- 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/853244 Title: Acer Aspire 5742Z brightness keys not working Status in The Linux Kernel: New Status in “linux” package in Ubuntu: Incomplete Bug description: In 2.6.32 (Lucid) there's an /sys/devices/virtual/backlight/acpi_video0 interface for Aspire 5742Z, and brightness hotkeys do modify the values of the files in that dir, but the actual laptop brightness isn't changed. In 3.0.0-9 (Oneiric beta 1) there's no /sys/devices/virtual/backlight interface at all. If I boot with acpi=off, the brightness keys correctly modify brightness, but of course I lose all other ACPI functionality. I tried some of the other acpi-related kernel parameters (acpi_backlight=vendor etc) mentioned in * https://wiki.ubuntu.com/Kernel/Debugging/Backlight * https://wiki.ubuntu.com/DebuggingACPI * www.kernel.org/doc/Documentation/kernel-parameters.txt * http://www.lesswatts.org/projects/acpi/debug.php to no avail, brightness only works with acpi=off or acpi=ht. I tried the fwts tool for ACPI testing, and it produced some errors, I'm attaching the output. I also tried playing with acpiexec, but calling the _BCM method didn't change the brightness either. `ubuntu-bug linux` doesn't work from the oneiric beta live CD, I'll manually attach lspci etc as well. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-24-generic 3.2.0-24.37 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: alkisg 1705 F.... xfce4-volumed alkisg 1736 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xb4400000 irq 44' Mixer name : 'Intel IbexPeak HDMI' Components : 'HDA:10ec0272,10250487,00100001 HDA:80862804,80860101,00100000' Controls : 27 Simple ctrls : 13 Date: Fri May 18 07:51:58 2012 HibernationDevice: RESUME=UUID=52f7a35f-fad8-4c9d-baf1-3d3087278f3c InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120201.1) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 003: ID 064e:c21c Suyin Corp. MachineType: Acer Aspire 5742Z ProcEnviron: LANGUAGE=el:en TERM=xterm PATH=(custom, no user) LANG=el_GR.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=9ba52df4-ec9e-4e1c-bbd7-322f50437f94 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-24-generic N/A linux-backports-modules-3.2.0-24-generic N/A linux-firmware 1.79 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/10/2011 dmi.bios.vendor: Acer dmi.bios.version: V1.24 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Aspire 5742Z dmi.board.vendor: Acer dmi.board.version: V1.24 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.24 dmi.modalias: dmi:bvnAcer:bvrV1.24:bd08/10/2011:svnAcer:pnAspire5742Z:pvrV1.24:rvnAcer:rnAspire5742Z:rvrV1.24:cvnAcer:ct10:cvrV1.24: dmi.product.name: Aspire 5742Z dmi.product.version: V1.24 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/853244/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
