Alkis Georgopoulos, the issue you are reporting is an upstream one. Could you please report this problem through the appropriate channel by following the instructions _verbatim_ at https://wiki.ubuntu.com/Bugs/Upstream/kernel#KernelTeam.2BAC8-KernelTeamBugPolicies.Overview_on_Reporting_Bugs_Upstream ?
Please provide a direct URL to your post once you have made it so that it may be tracked. Thank you for your understanding. ** Tags added: latest-bios-v1.30 trusty ** Description changed: 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. + 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. + WORKAROUND: echo 123 > /sys/class/backlight/intel_backlight/brightness + + WORKAROUND: If I boot with `acpi_osi=Linux` in the kernel command line, + I can change the brightness, but the brightness window doesn't pop up. 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 + **** 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 + 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 + 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. + 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 + 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 + 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 ** Tags added: lucid ** Summary changed: - Acer Aspire 5742Z brightness keys not working + 8086:0046 Acer Aspire 5742Z brightness keys not working ** Changed in: linux (Ubuntu) Importance: Medium => Low -- 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: 8086:0046 Acer Aspire 5742Z brightness keys not working Status in The Linux Kernel: New Status in “linux” package in Ubuntu: Triaged 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. WORKAROUND: echo 123 > /sys/class/backlight/intel_backlight/brightness WORKAROUND: If I boot with `acpi_osi=Linux` in the kernel command line, I can change the brightness, but the brightness window doesn't pop up. 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
