https://bugs.kde.org/show_bug.cgi?id=495819
Jon List <jon.list.a...@gmail.com> changed:
What |Removed |Added
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CC| |jon.list.a...@gmail.com
--- Comment #6 from Jon List <jon.list.a...@gmail.com> ---
One more report affirming this regression, loss of external monitor brightness
control, in Powerdevil from version 6.2.2-1 to 6.2.3-1
When using the system brightness hotkeys, only the internal laptop screen
brightness is displayed and changed.
I also do report the 2 second delay of brightness changes on the external
monitor, but that is consistent with running the command ddcutil setvcp 10 100.
I haven't tried any applets.
I have downgraded just Powerdevil to 6.2.2-1 with all other packages at 6.2.3-1
and brightness controls returned to working.
Hardware
Laptop. Lenovo Thinkpad T490s with Intel 8365 / Coffee Lake north bridge /
Whiskey Lake graphics / Canon Point south bridge / Alpine Ridge Thunderbolt
External Monitor. Lenovo P24q-10 using HDMI
Logitech LogiDock between laptop and monitor
DDCUTIL detect
Invalid display
I2C bus: /dev/i2c-5
DRM connector: card1-eDP-1
EDID synopsis:
Mfg id: LGD - UNK
Model:
Product code: 1580 (0x062c)
Serial number:
Binary serial number: 0 (0x00000000)
Manufacture year: 2018, Week: 0
This is a laptop display. Laptop displays do not support DDC/CI
Phantom display
Associated non-phantom display: bus /dev/i2c-8
I2C bus: /dev/i2c-7
DRM connector: card1-DP-2
EDID synopsis:
Mfg id: LEN - Lenovo Group Limited
Model: P24q-10
Product code: 24997 (0x61a5)
Serial number:
Binary serial number: 16843009 (0x01010101)
Manufacture year: 2019, Week: 35
DDC communication failed
Use non-phantom device bus /dev/i2c-8
Display 1
I2C bus: /dev/i2c-8
DRM connector: card1-DP-4
EDID synopsis:
Mfg id: LEN - Lenovo Group Limited
Model: P24q-10
Product code: 24997 (0x61a5)
Serial number:
Binary serial number: 16843009 (0x01010101)
Manufacture year: 2019, Week: 35
VCP version: 2.2
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