I had this same problem. After saving the grub text did you do : sudo
update-grub?
Thanks for your additions!
Regarding your screen brightness problem, I'm almost out of ideas. However, I
found this on Arch user foorums (link:
https://wiki.archlinux.org/index.php/Backlight#Backlight_utilities):
All methods expose themselves to the user by /sys/class/brightness. And
Hi blackomegarey and lammi87, thank you for your time. I installed the
linux-libre kernel and put the acpi_osi=Linux parameter on grub and didn't
solve the problem.
I've just registered my laptop at h-node.org
Sorry to hear the brightness problem is still bothering you. Try to search a
similar laptop models from h-node and see if they have any entries about
similar problem. This problem might have been solved already.
Anyway, thanks a lot for contributing to h-node!
Just found this on h-node:
Append acpi_backlight=vendor to GRUB_CMDLINE_LINUX_DEFAULT. Then run sudo
update-grub.
Basically, try adding acpi_backlight=vendor to the
GRUB_CMDLINE_LINUX_DEFAULT this time. This advice was found on Aspire
V5-471's entry details. This model has been
I have an Acer ASPIRE M5 481T and can't adjust the screen brightness. It came
with windows 8 pre-installed which I removed.
I used xbacklight and got No outputs have backlight property
Tried setpci -s 00:02.0 f4.b=XX without success.
Also changed the bootloader parameters with
On Sun, 17 Nov 2013 11:06:43 +0100 (CET)
x@x wrote:
I have an Acer ASPIRE M5 481T and can't adjust the screen brightness.
It came with windows 8 pre-installed which I removed.
I used xbacklight and got No outputs have backlight property
Tried setpci -s 00:02.0 f4.b=XX without success.
You can also try this which worked with my Asus Eee PC 1005PE:
Modify your /etc/default/grub configuration file to include acpi_osi=Linux
parameter on the GRUB_CMDLINE_LINUX_DEFAULT line and reboot. So, if it looks
like this:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash
Make it look like this:
