** Description changed: - Filed at Chris P's request, this bug is still present on both the Ubuntu - 14.04 kernel (3.13) as well as the latest mainline kernel (3.17). In - addition the mainline kernel causes additional issues with regards to - brightness control. + This bug is still present on both the Ubuntu 14.04 kernel (3.13) as well + as the latest mainline kernel (3.17). In addition the mainline kernel + causes additional issues with regards to brightness control. - I have used the boot param noapic to run Ubuntu on this laptop since - 12.04, however acpi=off, acpi=noirq or acpi_backlight=vendor - dell_laptop.backlight=0 all also fix the issue. Using the last option - however causes poor brightness control as the dell backlight driver is - not properly optimized. - - Related Reports: - * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1082244 - * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1072891 - * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1048141 + WORKAROUND: I have used the boot param noapic to run Ubuntu on this + laptop since 12.04, however acpi=off, acpi=noirq or + acpi_backlight=vendor dell_laptop.backlight=0 all also fix the issue. + Using the last option however causes poor brightness control as the dell + backlight driver is not properly optimized. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-37-generic 3.13.0-37.64 ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7 Uname: Linux 3.13.0-37-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: michael 2066 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: michael 2066 F.... pulseaudio CurrentDesktop: Unity Date: Sun Oct 19 15:50:18 2014 HibernationDevice: RESUME=UUID=79996bc0-bea3-4008-9182-e2afa0585224 InstallationDate: Installed on 2014-01-31 (260 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Dell Inc. Dell System XPS 15Z ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=4c859e77-4949-474c-9531-c6da9ef27187 ro noapic quiet splash RelatedPackageVersions: - linux-restricted-modules-3.13.0-37-generic N/A - linux-backports-modules-3.13.0-37-generic N/A - linux-firmware 1.127.7 + linux-restricted-modules-3.13.0-37-generic N/A + linux-backports-modules-3.13.0-37-generic N/A + linux-firmware 1.127.7 SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-04-16 (185 days ago) dmi.bios.date: 09/07/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 060G42 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.:bvrA12:bd09/07/2012:svnDellInc.:pnDellSystemXPS15Z:pvr:rvnDellInc.:rn060G42:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS 15Z dmi.sys.vendor: Dell Inc.
** Tags added: latest-bios-a12 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1382909 Title: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1382909/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
