Thindi, as per http://us.acer.com/ac/en/US/content/drivers an update is available for your BIOS (3310). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything? If it doesn't, could you please both specify what happened, and just 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: Confirmed => 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/1258495 Title: 8086:27ae [Acer AOA110] backlight too bright, can't dim it much Status in “linux” package in Ubuntu: Incomplete Bug description: Screen is far too bright, dims only slightly with hotkeys, brightness control applet ineffective. Tried more than half a dozen solutions (incl. editing the grub which used to work fine with Ubuntu 12.04) but none of them worked. thindi@thindi-AOA110:~$ ls /sys/class/backlight > backlight thindi@thindi-AOA110:~$ grep -r . /proc/acpi > acpi grep: /proc/acpi/event: Permission denied thindi@thindi-AOA110:~$ sudo acpidump -o acpidump.txt thindi@thindi-AOA110:~$ acpixtract acpidump.txt Acpi table [DSDT] - 24038 bytes written to DSDT.dat Acpi table [SSDT] - 1220 bytes written to SSDT.dat thindi@thindi-AOA110:~$ iasl -d DSDT.dat Intel ACPI Component Architecture AML Disassembler version 20100528 [Dec 19 2012] Copyright (c) 2000 - 2010 Intel Corporation Supports ACPI Specification Revision 4.0a Loading Acpi table from file DSDT.dat Acpi table [DSDT] successfully installed and loaded Pass 1 parse of [DSDT] Pass 2 parse of [DSDT] Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions) ................................................................................................................................................................................................................................................................................................................................................................... Parsing completed Disassembly completed, written to "DSDT.dsl" sudo fwts > fwts https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+attachment/3931116/+files/fwts thindi@thindi-AOA110:~$ dmesg | grep 'ACPI: Video' > video thindi@thindi-AOA110:~$ sudo dmidecode > dmidecode.log thindi@thindi-AOA110:~$ cat /proc/version > version Reboot with only the kernel parameter acpi_backlight=vendor: If that means the grub file (excerpt) should look like this: GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor" GRUB_CMDLINE_LINUX="" Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. Neither do the job. thindi@thindi-AOA110:~$ ls /sys/class/backlight > vendorbacklight thindi@thindi-AOA110:~$ sudo su root@thindi-AOA110:/home/thindi# ls -la /sys/class/backlight/intel_backlight/ > lslabacklight root@thindi-AOA110:/home/thindi# echo 8 > /sys/class/backlight/intel_backlight/brightness No change after doing that. o "Reboot with kernel parameter video.use_bios_initial_backlight=0" Don't know how to do that. Dealing with the rest on this site https://wiki.ubuntu.com/Kernel/Debugging/Backlight is out of my depth. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-14-generic 3.11.0-14.21 ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7 Uname: Linux 3.11.0-14-generic i686 ApportVersion: 2.12.5-0ubuntu2.1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: thindi 1586 F.... pulseaudio /dev/snd/pcmC0D0p: thindi 1586 F...m pulseaudio Date: Fri Dec 6 11:31:38 2013 HibernationDevice: RESUME=UUID=9793476b-8516-4e8d-b628-0dd0389b1376 InstallationDate: Installed on 2013-12-03 (3 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1) MachineType: Acer AOA110 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=bf6adaec-4e58-4748-95d7-8d287f559046 ro quiet splash pcie_aspm=force acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-14-generic N/A linux-backports-modules-3.11.0-14-generic N/A linux-firmware 1.116 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/06/2008 dmi.bios.vendor: Acer dmi.bios.version: v0.3309 dmi.board.asset.tag: Base Board Asset Tag dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 1 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAcer:bvrv0.3309:bd10/06/2008:svnAcer:pnAOA110:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion: dmi.product.name: AOA110 dmi.product.version: 1 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
