Po-Hsu Lin, as per http://www.dell.com/support/home/us/en/19/product- support/product/inspiron-3135/drivers an update to your computer's buggy and outdated BIOS is available (A02). 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 provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status Confirmed. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-a02 ** Package changed: linux-lts-raring (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Medium => Low ** 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-lts-raring in Ubuntu. https://bugs.launchpad.net/bugs/1249302 Title: AMD Radeon HD 8210[1002:9834] Brightness cannnot be adjusted without fglrx driver Status in linux package in Ubuntu: Incomplete Bug description: CID: 201308-14057 Dell Inspiron 3135 Brightness cannot be adjusted if the proprietary fglrx video driver is not installed. Module "radeon" cannot be found in lsmod, it seems that this graphic chip is not supported Steps: 1. Install 12.04.3, and boot to desktop. 2. Try to adjust screen brightness with hotkey 3. Try to adjust screen brightness in "Brightness and Lock" Expected results: 1. Brightness could be adjusted by the hokey 2. Brightness could be adjusted in "Brightness and Lock" Actual Results: 1. Hotkey event was correctly captured, brightness indicator level will change accordingly, but the brightness won't be altered. 2. Brightness cannot be adjusted in "Brightness and Lock" as well Update to 3.8.0-33 still not helping with this. However, acpi_backlight=vendor in grub can make it work. So as the proprietary fglrx driver. Debugging information: $ /usr/lib/nux/unity_support_test -c -p OpenGL vendor string: VMware, Inc. OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.2, 128 bits) OpenGL version string: 2.1 Mesa 9.1.7 Not software rendered: no Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes Compiz supported: no $ /usr/share/checkbox/scripts/graphics_driver ------------- VIDEO DRIVER INFORMATION ------------- ERROR: No video driver loaded! Possibly in failsafe mode! ------------- HYBRID GRAPHICS CHECK ---------------- Graphics Chipset: AMD (1002:9834) Loaded DDX Drivers: ati, radeon, vesa, modesetting, fbdev Hybrid Graphics: no $ cat /proc/version Linux version 3.8.0-33-generic (buildd@toyol) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #48~precise1-Ubuntu SMP Thu Oct 24 16:28:06 UTC 2013 $ dmesg | grep 'ACPI: Video' [ 9.979714] ACPI: Video Device [VGA] (multi-head: yes rom: no post: no) $ ls /sys/class/backlight dell_backlight === After the "acpi_backlight=vendor" was added into grub=== $ ls /sys/class/backlight dell_backlight ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.8.0-33-generic 3.8.0-33.48~precise1 ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11 Uname: Linux 3.8.0-33-generic x86_64 NonfreeKernelModules: wl AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 1: Generic_1 [HD-Audio Generic], device 0: ALC283 Analog [ALC283 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ubuntu 1735 F.... pulseaudio /dev/snd/controlC0: ubuntu 1735 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Generic'/'HD-Audio Generic at 0x90240000 irq 81' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100500' Controls : 7 Simple ctrls : 1 Card0.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Card1.Amixer.info: Card hw:1 'Generic_1'/'HD-Audio Generic at 0x90244000 irq 82' Mixer name : 'Realtek ALC283' Components : 'HDA:10ec0283,10280614,00100003' Controls : 16 Simple ctrls : 7 CurrentDmesg: [ 18.795370] init: anacron main process (1061) killed by TERM signal Date: Fri Nov 8 05:43:59 2013 HibernationDevice: RESUME=UUID=ac9c1dd5-27db-4d5d-be59-744320e42db0 InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1) MachineType: Dell Inc. Inspiron 3135 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-33-generic root=UUID=8ec40ec2-ac0a-457e-9879-4dce08e1c15f ro quiet splash acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.8.0-33-generic N/A linux-backports-modules-3.8.0-33-generic N/A linux-firmware 1.79.7 SourcePackage: linux-lts-raring UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/13/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: X11 dmi.board.name: BNE3A1 dmi.board.vendor: Dell Inc. dmi.board.version: X02 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: X11 dmi.modalias: dmi:bvnDellInc.:bvrX11:bd08/13/2013:svnDellInc.:pnInspiron3135:pvr:rvnDellInc.:rnBNE3A1:rvrX02:cvnDellInc.:ct8:cvrX11: dmi.product.name: Inspiron 3135 dmi.sys.vendor: Dell Inc. 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