15z

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== Fix various glitches ==

Add '''pcie_aspm=force acpi=noirq i915.semaphores=1''' to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.

Then run the following command:
||# update-grub||

And reboot. This fixes ACPI issues, lowers power consumption and 1-2 second regular freezes of your video card.

Introduction

This page should give you all the information you need about running Ubuntu on a Dell XPS 15z laptop.

Installation gotcha's

  • Boot installer with acpi=off

  • Start installer directly, not through 'Try Ubuntu without installing'

Hardware Support Matrix

Hardware

Ubuntu Release

Status

Keyboard

Natty (11.04)

Works

Oneiric (11.10)

???

Screen

Natty (11.04)

Works

Wireless ethernet

Natty (11.04)

Works

Trackpad

Natty (11.04)

Works with manual changes

Wired ethernet

Natty (11.04)

Works

Sound

Natty (11.04)

Works

Optimus

Natty (11.04)

Works with manual changes

Hardware

Optimus / Graphics cards

Switch off NVIDIA card

# echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

Switch on NVIDIA card

# echo ON > /sys/kernel/debug/vgaswitcheroo/switch

Using the following command before and after the switch, you should see a drop/rise in mW being used:

# grep rate /proc/acpi/battery/BAT0/state

You can also completely disable the NVIDIA card and only use the Intel onboard graphics card ( which has more than enough performance for day-to-day work:

# echo "blacklist nouveau" > /etc/modprobe.d/blacklist-nvidia.conf

# update-initramfs -c -k all

# reboot

Trackpad

Full multi-gesture trackpad usage does not work at this moment. It is however possible to get basic mouse functionality with the following command:

# sudo rmmod psmouse; sudo modprobe psmouse proto=imps

( Or use proto=bare or proto=exps ).

To make this persistent, add the following line at the bottom of /etc/modules:

echo "psmouse proto=imps" | sudo tee -a /etc/modules

Fix various glitches

Add pcie_aspm=force acpi=noirq i915.semaphores=1 to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.

Then run the following command:

# update-grub

And reboot. This fixes ACPI issues, lowers power consumption and 1-2 second regular freezes of your video card.

https://help.ubuntu.com/community/HybridGraphics

Trackpad

http://comments.gmane.org/gmane.linux.kernel/1108661

Information on Bumblebee (for graphics card Optimus support)

https://github.com/MrMEEE/bumblebee/issues/258

HardwareSupport/Machines/Laptops/Dell/XPS/15z (last edited 2014-06-24 09:25:38 by da6930p)