Bug 486412 - Powerdevil does not detect external display's i2c interface
Summary: Powerdevil does not detect external display's i2c interface
Status: RESOLVED DUPLICATE of bug 431994
Alias: None
Product: Powerdevil
Classification: Plasma
Component: general (show other bugs)
Version: 6.0.4
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-01 17:20 UTC by kndevl
Modified: 2024-05-04 15:06 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description kndevl 2024-05-01 17:20:48 UTC 
I use a laptop connected to an external display.

`ddcutil detect` lists the external display at /dev/i2c-13. The user is added to the i2c group.

The brightness control on the panel does not show this display. It only shows the laptop display's brightness slider.

Expected: The brightness control either displays both brightness sliders (one for external and one for internal display), or shows a single slider to control both sets of brightnesses.

Actual: Only one brightness slider visible. Changing the slider does not affect external display's brightness.

This could be related to https://bugs.kde.org/show_bug.cgi?id=465256 but the difference is that I don't have any DDC/powerdevil errors in my journal.
Comment 1 Natalie Clarius 2024-05-01 21:10:43 UTC 

*** This bug has been marked as a duplicate of bug 431994 ***