Thanks Petr, I have added your suggestion to the Wiki Tips and Trick page
https://wiki.trinitydesktop.org/Tips_And_Tricks#Troubleshooting
Cheers Michele
On 2023/05/12 09:50 PM, Petr Palacký via tde-users wrote:
Hi all,
for everyone who has the same problem with setting the display brightness with the nvidia driver (in my case "390 legacy"), I found the following solution to "revive" the display brightness:
In "/etc/default/grub" add "acpi_backlight=vendor" and/or "nvidia.NVreg_EnableBacklightHandler=1" to the variable GRUB_CMDLINE_LINUX_DEFAULT:
GRUB_CMDLINE_LINUX_DEFAULT="quiet nvidia.NVreg_EnableBacklightHandler=1 acpi_backlight=vendor".
... and reboot. With this setting, controlling the display brightness using TDE and multimedia (or Fn combination) keys should work (works for me).
Cheers
Petr Palacky
On Friday 12 of May 2023 09:58:30 Petr Palacký via tde-users wrote:
Hi Michele,
So everything is completely different in the end.
I've done a bunch of tests and installs and the only problem is the Nvidia 390 legacy drivers. If I use the nouveau drivers on my existing installation, the brightness can be controlled without any problems, but when I use the official nvidia (390 legacy) drivers, the brightness cannot be controlled.
So it's definitely not a TDE problem. It's a problem of nvidia drivers.
I apologize for the confusion. I didn't think of this at all during the inquiry.
Cheers
Petr Palacky