Since my new xubuntu installation (after the previous LTS) I lost control over the brightness - there used to be a brightness adjustment applet on the top panel, and now it's gone. I tried to restore Fn keys functionality, or changing the grub, but none of
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux" GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
worked for me (I did remember to do sudo update-grub before rebooting)
The fnfx client also did not change anything, when I try to run it
fnfx it gives me an error:
FnFX Client v0.3 (c) 2003, 2004 Timo Hoenig <firstname.lastname@example.org> fatal error: Could not open "/home/chris/.fnfxrc". Please make sure that the default config is accessible.
sudo setpci -s 00:02.0 F4.B=X does not work for me neither.
I cannot follow this Fn keys for Brightness not working on Toshiba Satellite L755 suggestion to edit BIOS settings (which are not defined in that post) - does anyone know which settings could be changed in BIOS, and how ?
I run out of possibilities. Any other suggestions that could perhaps enable me to control the brightness of my display? Pointing me in a good direction would be really helpful.
Thank you so much,