https://bugs.kde.org/show_bug.cgi?id=487433
Bug ID: 487433
Summary: KDE brightness control actually changes display's
black level, not its brightness
Classification: Plasma
Product: Powerdevil
Version: 6.0.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: alex-bugs.kde....@alexburke.ca
CC: m...@ratijas.tk, natalie_clar...@yahoo.de
Target Milestone: ---
SUMMARY
KDE's brightness control is actually changing the black level of my displays
(Fujitsu B24T-7).
STEPS TO REPRODUCE
1. Hover mouse pointer over brightness widget
2. Scroll mouse wheel
3. ???
4. Profit!
OBSERVED RESULT
Image is affected in a way that's hard to describe, like fading mostly to
black, but at the same brightness.
EXPECTED RESULT
Backlight dims without affecting anything else.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
Kernel Version: 6.6.31-1-lts (64-bit)
Graphics Platform: Wayland
Processors: 24 × Intel® Xeon® CPU E5-2690 v3 @ 2.60GHz
Memory: 125.7 GiB of RAM
Graphics Processor: NV117
Manufacturer: FUJITSU
Product Name: CELSIUS M740
ADDITIONAL INFORMATION
Output from `ddcui`:
---
Display number: 1
I2C bus: /dev/i2c-0
Mfg Id: FUS
Model: B24T-7 LED PG
Product code: 2093
Serial number: YV6K040698
Binary serial number: 40698 (0x00009efa)
EDID:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 1a b3 2d 08 fa 9e 00 00
..........-.....
+0010 10 18 01 03 80 35 1e 78 2a 0e c5 a5 55 50 9e 26
.....5.x*...UP.&
+0020 12 50 54 a5 4b 00 81 c0 81 80 95 00 b3 00 d1 c0
.PT.K...........
+0030 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
.......:..q8-@X,
+0040 45 00 13 2b 21 00 00 1e 00 00 00 fd 00 38 4c 1e
E..+!........8L.
+0050 52 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 42 R...
.....B
+0060 32 34 54 2d 37 20 4c 45 44 20 50 47 00 00 00 ff 24T-7 LED
PG....
+0070 00 59 56 36 4b 30 34 30 36 39 38 0a 20 20 01 6a .YV6K040698.
.j
VCP Version: 2.2
---
Display number: 2
I2C bus: /dev/i2c-4
Mfg Id: FUS
Model: B24T-7 LED PG
Product code: 2093
Serial number: YV6K213876
Binary serial number: 213876 (0x00034374)
EDID:
+0 +4 +8 +c 0 4 8 c
+0000 00 ff ff ff ff ff ff 00 1a b3 2d 08 74 43 03 00
..........-.tC..
+0010 30 19 01 03 80 35 1e 78 2a 0e c5 a5 55 50 9e 26
0....5.x*...UP.&
+0020 12 50 54 a5 4b 00 81 c0 81 80 95 00 b3 00 d1 c0
.PT.K...........
+0030 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
.......:..q8-@X,
+0040 45 00 13 2b 21 00 00 1e 00 00 00 fd 00 38 4c 1e
E..+!........8L.
+0050 52 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 42 R...
.....B
+0060 32 34 54 2d 37 20 4c 45 44 20 50 47 00 00 00 ff 24T-7 LED
PG....
+0070 00 59 56 36 4b 32 31 33 38 37 36 0a 20 20 01 27 .YV6K213876.
.'
VCP Version: 2.2
---
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