Shaun Duncan, as per http://www.dell.com/support/troubleshooting/us/en/19/Product/xps-13 -l321x-mlk an update is available for your BIOS (A10). 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. ** Tags added: bios-outdated-a10 ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Attachment removed: "lspci-vnvn.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1232459/+attachment/3847174/+files/lspci-vnvn.log ** Attachment removed: "version.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1232459/+attachment/3847173/+files/version.log ** Summary changed: - Brightness control broken for Dell XPS 13 on Raring 13.04 after kernel upgrade + [Dell XPS 13 L322X] Brightness control broken on Raring 13.04 after kernel upgrade -- 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/1232459 Title: [Dell XPS 13 L322X] Brightness control broken on Raring 13.04 after kernel upgrade Status in “linux” package in Ubuntu: Incomplete Bug description: I've seen this problem in both kernels 3.8.0.30-generic and 3.8.0.31-generic. It seems to be working without any problems in 3.8.0.29-generic. Current version of intel packages: xserver-xorg-video-intel: 2:2.21.6-0ubuntu4.1 libdrm-intel1: 2.4.43-0ubuntu1.1 --- ApportVersion: 2.9.2-0ubuntu8.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sduncan 1885 F.... pulseaudio DistroRelease: Ubuntu 13.04 HibernationDevice: RESUME=UUID=c4838fd3-7b17-4660-bcee-182637bc6e6d InstallationDate: Installed on 2013-08-13 (45 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Dell Inc. Dell System XPS L322X MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-31-generic.efi.signed root=UUID=d04e0f52-da13-4e30-9581-f0a8d2f32051 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8 RelatedPackageVersions: linux-restricted-modules-3.8.0-31-generic N/A linux-backports-modules-3.8.0-31-generic N/A linux-firmware 1.106 Tags: raring Uname: Linux 3.8.0-31-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 05/15/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 0WG38X dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA09:bd05/15/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0WG38X:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L322X dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1232459/+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