FS#67533 - [powerdevil] Enable DDCI support to support external display brightness control

Attached to Project: Arch Linux
Opened by lin ziyun (maz-1) - Sunday, 09 August 2020, 09:45 GMT
Last edited by Antonio Rojas (arojas) - Sunday, 09 August 2020, 17:37 GMT
Task Type Feature Request
Category Packages: Extra
Status Closed
Assigned To Antonio Rojas (arojas)
Felix Yan (felixonmars)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

Description:
kde powerdevil has ddci support added, but it is not enabled in archlinux, so unable to control hdmi/displayport display brightness
more info: https://www.reddit.com/r/archlinux/comments/epbuuf/kde_my_journey_to_get_a_brighness_slider_for_my/

Additional info:
package version: powerdevil-5.19.4

Steps to reproduce:
install powerdevil from extra repo
This task depends upon

Closed by  Antonio Rojas (arojas)
Sunday, 09 August 2020, 17:37 GMT
Reason for closing:  Upstream
Comment by Antonio Rojas (arojas) - Sunday, 09 August 2020, 10:53 GMT
From upstream CMakeLists.txt:
add_feature_info("DDCUtil" HAVE_DDCUTIL "DDCUtil library support is disabled by default as recommended by authors, add -DHAVE_DDCUTIL=On to enable")

Plus, ddcutil support is poorly maintained, to the point that it constantly breaks with new versions of ddcutil, with upstream failing to catch up with the changes (see the two year old https://bugs.kde.org/show_bug.cgi?id=398473). In fact it doesn't build with the latest version of ddcutil currently in our repos. We can't enable this until it gets proper support upstream.

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