https://bugzilla.kernel.org/show_bug.cgi?id=208341
--- Comment #4 from Mik (e...@gmx.com) ---
Energy Saving parameters are all disabled, but if screen brightness is set to
maximum for battery and AC power the bug is not the same.
pacman -Ss kde-agent
extra/polkit-kde-agent 5.19.2-1 (plasma)
Daemon providing a polkit authentication UI for KDE
community/polkit-kde-agent-git 5.19.80.r442.g14f09c4-1 (plasma-git) [installed]
Daemon providing a polkit authentication UI for KDE
pacman -Q mesa
mesa 20.1.2-1
Disconnecting the PS does the same, but reconnecting restores the level to
maximum.
Enabling all energy saving parameters to default gives the same result: no need
to touch brightness, disconnecting/reconnecting the PS restores the level to
maximum.
Nothing wrong on stable Kernel 5.7-6 with energy saving enabled or disabled.
pacman -Ss acpi
extra/linux414-acpi_call 1.1.0-158 (linux414-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux419-acpi_call 1.1.0-120 (linux419-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux44-acpi_call 1.1.0-159
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux49-acpi_call 1.1.0-173 (linux49-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux54-acpi_call 1.1.0-55 (linux54-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux56-acpi_call 1.1.0-23 (linux56-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux57-acpi_call 1.1.0-10 (linux57-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
extra/linux58-acpi_call 1.1.0-0.3 (linux58-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
community/acpi 1.7-3 [installed]
Client for battery, power, and thermal readings
community/acpi_call-dkms 1.1.0-287
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call - module sources
community/acpica 20200528-1
ACPI tools, including Intel ACPI Source Language compiler
community/acpid 2.0.32-1 [installed]
A daemon for delivering ACPI power management events with netlink support
community/acpilight 1.2-1
a backward-compatible xbacklight replacement based on ACPI
community/linux-latest-acpi_call 5.7-1 (linux-latest-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call (metapackage)
community/linux-lts-acpi_call 1:5.4-3 (linux-lts-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call (metapackage)
community/linux-rt-lts-manjaro-acpi_call 5.4-1
(linux-rt-lts-manjaro-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
community/linux-rt-manjaro-acpi_call 5.6-2 (linux-rt-manjaro-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
community/linux54-rt-acpi_call 1.1.0-17 (linux54-rt-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
community/linux56-rt-acpi_call 1.1.0-6 (linux56-rt-extramodules)
A linux kernel module that enables calls to ACPI methods through
/proc/acpi/call
community/tpacpi-bat 3.1-3
A Perl script with ACPI calls for recent ThinkPads (such as T420 and W520)
whose battery thresholds are not supported by tp_smapi
Operating System: Manjaro Linux
KDE Plasma Version: 5.19.80
KDE Frameworks Version: 5.72.0
Qt Version: 5.15.0
Kernel Version: 5.8.0-1-MANJARO
OS Type: 64-bit
Processors: 8 × AMD Ryzen 7 2700U with Radeon Vega Mobile Gfx
Memory: 7.5 GiB of RAM
Graphics Processor: AMD RAVEN
Same with latest updates:
pacman -Q amd-ucode
amd-ucode 20200629.r1663.1a0c0c2-1
pacman -Q linux-firmware
linux-firmware 20200629.r1663.1a0c0c2-1
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