Ubuntu
gdm3 package

Fn for nvidia backlight working on kde but not on gnome

Bug #1768764 reported by Bump
This bug report is a duplicate of:  Bug #1720438: brightness control broken nvidia. Edit Remove
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gdm3 (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

With wayland can't control screen brightness using nvidia proprietary drivers. The screen brightness is always at 100%.

Please DON'T enable wayland by default on fresh installations or updates because it's not 100% compatible with nvidia proprietary drivers. Nouveau still doesn't support backlight control on Pascal cards.

Tags: nvidia
Revision history for this message
Bump (bump55) wrote : Re: disable wayland by default - nvidia proprietary drivers backlight

Don't mess the system until it's 100% functional.

summary: - disable wayland by default because nvidia backlight doesn't work
+ disable wayland by default - nvidia proprietary drivers backlight
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

"Wayland" is only a protocol and "wayland (Ubuntu)" is a series of libraries for that protocol. So please don't log bugs against "wayland".

What you are describing sounds most likely like Gnome Shell, where the mutter component chooses Wayland or X11.

affects: wayland (Ubuntu) → mutter (Ubuntu)
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Also, we do disable Wayland by default for login sessions. Ubuntu 18.04 uses Xorg by default.

Wayland is only enabled by default for gdm3. Do you have a problem with the login screen?

Also, can you please run this command to tell us more information about your system?;

  apport-collect 1768764

Changed in gdm3 (Ubuntu):
status: New → Incomplete
no longer affects: mutter (Ubuntu)
tags: added: nvidia
Revision history for this message
Bump (bump55) wrote :

Probably duplicate of this:
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-384/+bug/1720438

With KDE the Fn keys work perfectly.

Changed in gdm3 (Ubuntu):
status: Incomplete → New
Revision history for this message
Bump (bump55) wrote :

Will try later this tutorial and report back.

https://linuxconfig.org/how-to-disable-wayland-and-enable-xorg-display-server-on-ubuntu-18-04-bionic-beaver-linux

Revision history for this message
Bump (bump55) wrote :

Ok tried several graphical environments with the line "WaylandEnable=false" commented and uncommented, and the proprietary nvidia graphics driver, and those are the results:

- Desktop Session: Ubuntu: Fn to control screen backlight doesn't work in any case, neither line enabled nor disabled.

- Desktop Session: Ubuntu on Wayland (Wayland): can't even enter to the desktop in either case. After entering the password for my username the screen goes black a few seconds and then returns to the login manager.

- Desktop Session: Plasma: Fn + up arrrow /down arrow work perfectly in both cases, with line enabled or disabled. I recommend everyone to use KDE Plasma instead.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Please run this command to tell us more information about your system:

  apport-collect 1768764

Changed in gdm3 (Ubuntu):
status: New → Incomplete
Revision history for this message
Bump (bump55) wrote :

This is a duplicate of bug #1720438

Changed in gdm3 (Ubuntu):
status: Incomplete → Confirmed
summary: - disable wayland by default - nvidia proprietary drivers backlight
+ nvidia proprietary drivers backlight now working on gnome but do on kde
summary: - nvidia proprietary drivers backlight now working on gnome but do on kde
+ Fn for nvidia backlight working on kde but not on gnome
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