Marking to Low as this issue has more than enough information to demonstrate a bug but the root cause is to be determined.
** Description changed: 1) lsb_release -rd Description: Ubuntu oneiric (development branch) Release: 11.10 2) uname -r 3.0.0-12-generic-pae - 3) What is expected to happen when one presses the Fn key and the Left + apt-cache policy xfce4-power-manager-plugins + xfce4-power-manager-plugins: + Installed: 1.0.10-4 + Candidate: 1.0.10-4 + Version table: + *** 1.0.10-4 0 + 500 http://archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages + 100 /var/lib/dpkg/status + + 3) What is expected to happen when one presses the Fn key and the Left or Right arrow, the brightness goes up or down respectively. - 4) What happens is the brightness does not change and remain at 100% no - matter what. + 4) What happens is the brightness does not change and remains at 100% no + matter what. Following the debug info + at:https://wiki.ubuntu.com/Kernel/Debugging/Backlight + + this issue falls into the "Backlight control does not work, but there + are entries in /sys/class/backlight" category. + + lsmod | grep thinkpad_acpi + + does not yield any information. + + No such path as: /proc/acpi/video + + Attempting to follow: https://wiki.ubuntu.com/BIOSandUbuntu#Buggy%20DSDT + fails partially as iasl is not an available package in 11.10: + + apt-cache policy iasl + N: Unable to locate package iasl + + However: + + sudo acpidump -o acpidump.txt && acpixtract acpidump.txt + Acpi table [DSDT] - 36436 bytes written to DSDT.dat + Acpi table [SSDT] - 3010 bytes written to SSDT1.dat + Acpi table [SSDT] - 2316 bytes written to SSDT2.dat + Acpi table [SSDT] - 2454 bytes written to SSDT3.dat + + (Please see attached acpixtract.zip). Also, please see attached + results.log for sudo fwts and sudo fwts method. + + Changing the "xfce4-brightness-plugin 1.0.10" to half way down goes + from: + + /sys/class/backlight/intel_backlight$ grep . /sys/class/backlight/acpi_video0/* + /sys/class/backlight/acpi_video0/actual_brightness:9 + /sys/class/backlight/acpi_video0/bl_power:0 + /sys/class/backlight/acpi_video0/brightness:9 + /sys/class/backlight/acpi_video0/max_brightness:9 + /sys/class/backlight/acpi_video0/type:firmware + + to: + + /sys/class/backlight/intel_backlight$ grep . /sys/class/backlight/acpi_video0/* + /sys/class/backlight/acpi_video0/actual_brightness:5 + /sys/class/backlight/acpi_video0/bl_power:0 + /sys/class/backlight/acpi_video0/brightness:5 + /sys/class/backlight/acpi_video0/max_brightness:9 + /sys/class/backlight/acpi_video0/type:firmware + + dmesg|grep 'ACPI: Video' + [ 4.181103] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) + + lspci |grep VGA + 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-12-generic-pae 3.0.0-12.19 ProcVersionSignature: Ubuntu 3.0.0-12.19-generic-pae 3.0.4 Uname: Linux 3.0.0-12-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu2 Architecture: i386 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of CAPTURE Hardware Devices **** + card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: moniker 1750 F.... xfce4-volumed - moniker 1798 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: moniker 1750 F.... xfce4-volumed + moniker 1798 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: - Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 50' - Mixer name : 'Intel CougarPoint HDMI' - Components : 'HDA:10ec0269,10250504,00100100 HDA:80862805,80860101,00100000' - Controls : 20 - Simple ctrls : 11 + Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 50' + Mixer name : 'Intel CougarPoint HDMI' + Components : 'HDA:10ec0269,10250504,00100100 HDA:80862805,80860101,00100000' + Controls : 20 + Simple ctrls : 11 Date: Fri Sep 30 06:05:13 2011 EcryptfsInUse: Yes InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110921.3) MachineType: Acer Aspire 5750 ProcEnviron: - LANG=en_US.UTF-8 - SHELL=/bin/bash + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=af001e50-f2b3-44af-a197-164b20aa8c44 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.0.0-12-generic-pae N/A - linux-backports-modules-3.0.0-12-generic-pae N/A - linux-firmware 1.60 + linux-restricted-modules-3.0.0-12-generic-pae N/A + linux-backports-modules-3.0.0-12-generic-pae N/A + linux-firmware 1.60 RfKill: - 0: phy0: Wireless LAN - Soft blocked: no - Hard blocked: no + 0: phy0: Wireless LAN + Soft blocked: no + Hard blocked: no SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/11/2011 dmi.bios.vendor: Acer dmi.bios.version: V1.05 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JE50_HR dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.05 dmi.modalias: dmi:bvnAcer:bvrV1.05:bd02/11/2011:svnAcer:pnAspire5750:pvrV1.05:rvnAcer:rnJE50_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.05: dmi.product.name: Aspire 5750 dmi.product.version: V1.05 dmi.sys.vendor: Acer ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Summary changed: - Brightness unchangable Acer Aspire 5750-9668 + Brightness unchangeable via keyboard or brightness applet Acer Aspire 5750-9668 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/863156 Title: Brightness unchangeable via keyboard or brightness applet Acer Aspire 5750-9668 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/863156/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
