I've flashed the BIOS update via FreeDOS live cd and I'm currently on version A10, release date 08/28/2013. At first, it did not look as if it had done anything to fix the problem. Brightness control was still not working.
However, I noticed a recent comment (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954661/comments/108) that suggested changing the option of Load Legacy Option Rom to Enabled from the BIOS setup menu. I also removed all options from GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub so it was an empty string. Now it appears that with kernel 3.8.0-33-generic I have brightness control working again. I'm not entirely sure if it was indeed the BIOS update or the /etc/default/grub + BIOS setup menu change that ended up correction the situation, but I'll see if I can pinpoint which one did the trick. -- 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
