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Bug 790520 - Brightness flickering on Wacom MobileStudio
Brightness flickering on Wacom MobileStudio
Product: gnome-settings-daemon
Classification: Core
Component: power
Other Linux
: Normal normal
: ---
Assigned To: gnome-settings-daemon-maint
Depends on:
Reported: 2017-11-18 00:13 UTC by Jehan
Modified: 2019-03-20 11:50 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description Jehan 2017-11-18 00:13:03 UTC
I just installed Fedora 26 (GNOME 3.26) on a Wacom MobileStudio Pro 13" computer, with a Intel® Iris™ Graphics 550 graphics card.
The screen brightness is just going up, down, up down. Completely random.

Checking for instance in a TTY terminal, it looks like I see no brightness change. So my current assumption is that it is GNOME-related (and not for instance the video card driver).

Any data you need to diagnose?
Comment 1 Jehan 2017-11-18 00:16:09 UTC
Note: it happens both with GNOME on X and Wayland.
Comment 2 Jehan 2017-11-18 22:55:47 UTC
It turns out that GNOME detected that this laptop has an ambient light sensor, therefore it activated the "Automatic brightness".

So the good news is that it's not a bug regarding to brightness changing.
I still keep this open because it is still a bug regarding by sensitivity. The brightness changing was completely crazy (I could even show you a video showing it; no way to work this way). There needs to be either a better detection of brightness change sensitivity or at least to be able to customize the sensitivity range or something.
Comment 3 Jehan 2017-11-22 22:59:30 UTC
By the way, I notice that the annoying brightness flickering still happens in the login screen because the Power settings only affect the current user.

There should probably be a way to change the settings for GDM. Or maybe even better/simpler, the "Automatic brightness" should just never be activated on GDM. This doesn't make much sense to have such feature at login.
Comment 4 GNOME Infrastructure Team 2019-03-20 11:50:54 UTC
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