I found a way to startup in kernals post-3.2.0.32, based on some
information I found here:
https://wiki.ubuntu.com/HardwareSupport/Machines/Laptops/Dell/XPS/15z.
To make the fix persistent, I edited the default grub settings (the
guidelines in the link above did not work):
sudo gedit /etc/default/grub
change the the settings in GRUB_CMDLINE_LINUX_DEFAULT:
# This is what the line originally read
# GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force acpi=noirq
i915.semaphores=1 acpi_sleep=nonvs"
# This is the new value
GRUB_CMDLINE_LINUX_DEFAULT="acpi=noirq acpi_backlight=vendor
dell_laptop.backlight=0 quiet splash"
The order of these parameters might matter, but I did not try different
arrangements. Now Ubuntu starts in 12.04, using kernel 3.2.0.39 without
any problems.
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https://bugs.launchpad.net/bugs/1097892
Title:
Ubuntu 12.04 doesn't start on Dell Inspiron 15z laptop
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