Hi,
Some insights on this.
I'm trying to install Ubuntu on a Packard Bell EasyNote LJ65. This
laptop as a GMA4500 M chip.
After some research, I saw that from kernel with version above
2.6.38_rc8 (in other words, version of Ubuntu higher than 10.10), a
regression did happen causing no backlight
Can confirm this, on 12.04 this bug is still present, add:
acpi_osi=Linux pcie_aspm=off
to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub, do
sudo update-grub
to work with ubuntu on Dell Vostro3700.
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Bugs, which is
I found kind of a workaround for this problem.
1. gedit /etc/default/grub
2. change:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash
to
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi=off
3. sudo update-grub
4. reboot
5. now the brighness controls works but there is no indicator on the upper
right corner
acpi=off disabled battery indicator and processor stayed at 100%.
instead acpi=off I have addded: acpi_osi=Linux
works like a charm!
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https://bugs.launchpad.net/bugs/880096
Title:
from what I remember on 11.04 it worked just fine. after upgrade 11.0411.10 it
was still working fine.
but I had other issues and I had to install 11.10 from scratch.
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-power-manager (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/880096
** Package changed: ubuntu = gnome-power-manager (Ubuntu)
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https://bugs.launchpad.net/bugs/880096
Title:
cant change laptop brightness
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