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Maniphest T8621

Screen brightness act with delay since Friday Sync
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Description

Since this week's friday sync, screen brightness does not work as before.
Now there is a delay of about 0.1 or 0.2 seconds between the time at which the 'backlight up/down' key is pressed and the time at which screen brightness is modified.
The same behaviour happens if I use xbacklight to change it.
It doesn't look like a kernel problem. I tested it on linux-current and linux-lts, and the problem happens for both kernel.
The kernel command line has not been modified, I use UEFI.

Maybe it can help: if I repeatedly press the light up/down key on my keyboard, fan start spinning and htop shows that gsd-backlight-helper is taking a lot of CPU for a short time.

I'm using a Lenovo Thinkpad E480, with Solus Budgie edition on it.

Please don't hesitate to ask more info about my setup if it can help

Information to help:

Event Timeline

josephscade created this task.Jan 19 2020, 4:15 PM
Herald added a project: Lacks Project. · View Herald TranscriptJan 19 2020, 4:15 PM
josephscade updated the task description. (Show Details)Jan 19 2020, 4:25 PM
josephscade added a comment.Jan 20 2020, 6:14 PM

Update:

Changing brightness works as usual if done in tty, using light. As such, I think the problem comes from the X stack or the gnome/budgie stack.

DataDrake triaged this task as Normal priority.Feb 5 2020, 5:34 AM
DataDrake edited projects, added Hardware; removed Lacks Project.
TClark77 added a subscriber: TClark77.Thu, Aug 3, 7:42 PM

Does this issue still happen with an up to date Solus installation? There have been many updates and bug fixes since this issue was last updated.

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