Bug 445426

Summary:	Unnecessary warning about kernel backlight interface
Product:	[Plasma] plasmashell	Reporter:	pat_h
Component:	Power management & brightness	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	CONFIRMED ---
Severity:	minor	CC:	nate
Priority:	NOR
Version First Reported In:	6.2.4
Target Milestone:	1.0
Platform:	Debian unstable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description pat_h 2021-11-13 15:28:38 UTC

SUMMARY
powerdevil reports a totally useless warning to the Journal on every login. The warning is about "no kernel backlight interface found", which not surprising on a desktop PC.

STEPS TO REPRODUCE
1. Use a desktop PC and login
2. 
3. 

OBSERVED RESULT
The Journal contains a warning "no kernel backlight interface found".

EXPECTED RESULT
On a desktop PC this should probably either be a debug output or completely removed. Until more specific conditions are implemented, downgrading this to LOG_INFO seems to be fine according to https://www.man7.org/linux/man-pages/man3/syslog.3.html.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.14.0-2-amd64 (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-6500 CPU @ 3.20GHz
Memory: 11,6 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 530

ADDITIONAL INFORMATION

Comment 1 Nate Graham 2021-11-23 18:40:17 UTC

Nice catch. Would you be interested in submitting a merge request to fix it?