Not very sure which KDE package this may fall under. In my laptop's power management settings I had a monitor brightness setting of 14% on AC power and battery, 18% on low battery. I use my laptop (Thinkpad x270) with a Thinkpad dock with HDMI monitor attached, and have kscreen set to turn off the laptop panel when docking / on when undocking. Since plasma-6.2, on undocking, the panel always returns to a value of 33% brightness. This ignores the Power Management settings and I have no idea where that value comes from (I'm sure I never set that value myself and have grepped around in ~/.config, ~/.local etc. to no avail). X11 session. # emerge --info kde-plasma/plasma-desktop Portage 3.0.66.1 (python 3.12.7-final-0, default/linux/amd64/23.0/split-usr/desktop/plasma, gcc-14, glibc-2.40-r5, 6.11.0-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-6.11.0-gentoo-x86_64-Intel-R-_Core-TM-_i7-7600U_CPU_@_2.80GHz-with-glibc2.40 KiB Mem: 16115096 total, 5356496 free KiB Swap: 18753532 total, 18753532 free Timestamp of repository gentoo: Sun, 20 Oct 2024 19:30:00 +0000 Head commit of repository gentoo: 68e96354beefb3f1e1cdafaa54f106c79ed5f501 Head commit of repository kdab-overlay: 1a81be19dfa239cd4796da866b2b623ca32f4864 sh bash 5.2_p37 ld GNU ld (Gentoo 2.43 p2) 2.43.1 ccache version 4.10.2 [disabled] app-misc/pax-utils: 1.3.8::gentoo app-shells/bash: 5.2_p37::gentoo dev-build/autoconf: 2.72-r1::gentoo dev-build/automake: 1.16.5-r2::gentoo, 1.17-r1::gentoo dev-build/cmake: 3.30.5::gentoo dev-build/libtool: 2.5.3::gentoo dev-build/make: 4.4.1-r100::gentoo dev-build/meson: 1.5.2::gentoo dev-java/java-config: 2.3.4::gentoo dev-lang/perl: 5.40.0::gentoo dev-lang/python: 3.12.7_p1::gentoo, 3.13.0::gentoo dev-lang/rust-bin: 1.82.0::gentoo dev-util/ccache: 4.10.2-r1::gentoo sys-apps/baselayout: 2.15::gentoo sys-apps/openrc: 0.55.1::gentoo sys-apps/sandbox: 2.39::gentoo sys-devel/binutils: 2.43-r1::gentoo sys-devel/binutils-config: 5.5.2::gentoo sys-devel/clang: 18.1.8::gentoo sys-devel/gcc: 14.2.0::gentoo sys-devel/gcc-config: 2.11::gentoo sys-devel/llvm: 18.1.8-r4::gentoo, 19.1.2::gentoo sys-kernel/linux-headers: 6.11::gentoo (virtual/os-headers) sys-libs/glibc: 2.40-r5::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://hazel/gentoo-portage priority: -1000 volatile: True sync-rsync-extra-opts: sync-rsync-verify-max-age: 3 sync-rsync-verify-jobs: 1 sync-rsync-verify-metamanifest: no kdab-overlay location: /var/db/repos/kdab-overlay sync-type: git sync-uri: https://github.com/KDAB/kdab-overlay.git masters: gentoo volatile: False x-portage location: /usr/local/portage masters: gentoo priority: 0 volatile: True ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php8.1/ext-active/ /etc/php/apache2-php8.2/ext-active/ /etc/php/apache2-php8.3/ext-active/ /etc/php/cgi-php8.1/ext-active/ /etc/php/cgi-php8.2/ext-active/ /etc/php/cgi-php8.3/ext-active/ /etc/php/cli-php8.1/ext-active/ /etc/php/cli-php8.2/ext-active/ /etc/php/cli-php8.3/ext-active/ /etc/php/fpm-php8.1/ext-active/ /etc/php/fpm-php8.2/ext-active/ /etc/php/fpm-php8.3/ext-active/ /etc/php/phpdbg-php8.1/ext-active/ /etc/php/phpdbg-php8.2/ext-active/ /etc/php/phpdbg-php8.3/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=native -O2 -pipe -fomit-frame-pointer" DISTDIR="/var/cache/distfiles" EMERGE_DEFAULT_OPTS="--nospinner --verbose-conflicts --quiet-build=n" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-march=native -O2 -pipe -fomit-frame-pointer" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg-live distlocks ebuild-locks fail-clean fixlafiles ipc-sandbox merge-sync merge-wait multilib-strict network-sandbox news pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-march=native -O2 -pipe -fomit-frame-pointer" GENTOO_MIRRORS="http://www.mirrorservice.org/sites/distfiles.gentoo.org/ http://mirrors.gethosted.online/gentoo http://mirrors.soeasyto.com/distfiles.gentoo.org/" LANG="en_GB.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs" LEX="flex" LINGUAS="en_GB" MAKEOPTS="-j5" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/tmp" SHELL="/bin/bash" USE="X a52 aac acl acpi activities alsa amd64 bash-completion bluetooth branding bzip2 cairo cdda cddb cdr cet crypt css cups dbus declarative dga djvu dri dri3 dts dvd dvdr egl elogind encode exif fam fbcon ffmpeg flac ftp gbm gd gdbm geoip gif gimp gles gles2 gmp gphoto2 gpm graphviz gtk gui hddtemp iconv icu imagemagick imap inotify ipv6 java javascript jit jpeg kde kf6compat kwallet lame latex lcms libglvnd libnotify libtirpc lm-sensors lto lzma lzo mad matroska mbox mmap mng mp3 mp4 mpeg mplayer mtp multilib musicbrainz mysql ncurses networkmanager nls ocamlopt offensive ofx ogg opengl openmp pam pango pcre pda pdf perl php pipewire plasma png policykit posix postscript ppds pulseaudio qml qt5 qt6 radius raw readline rss rtc samba scanner screencast sdl seccomp session sharedmem smp snmp sockets socks5 sound spell split-usr sqlite sqlite3 ssl startup-notification subversion svg syslog tcpd test-rust theora threads tidy tiff tk tokenizer truetype udev udisks unicode upnp upnp-av upower usb v4l vaapi vcd vhosts vnc vorbis vulkan wayland webp widgets wifi wmf wps wxwidgets x264 xattr xcb xft xml xpm xscreensaver xv xvid xvmc zlib" ABI_X86="64" ADA_TARGET="gcc_12" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GRUB_PLATFORMS="efi-64 multiboot" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en-GB" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LLVM_TARGETS="X86 BPF" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12" RUBY_TARGETS="ruby32" SANE_BACKENDS="net" VIDEO_CARDS="intel i965 iris" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS ================================================================= Package Settings ================================================================= kde-plasma/plasma-desktop-6.2.1::gentoo was built with the following: USE="handbook screencast sdl -debug -ibus -scim -semantic-desktop -test -webengine" ABI_X86="(64)"
Apologies, I was incorrect about the triggering factor. The 33% setting is imposed at boot before logging in - I can see this in /sys/class/backlight/intel_backlight/brightness. However, prior to kde-*-6.2.0 the lower setting was always restored when logging in to plasma-x11 after boot, so something has changed.
What about 6.2.3 then?
Not had time to upgrade this box yet, hopefully this weekend. 6.2.2 still affected.
Yep, still occurring, plasma-meta-6.2.3.
Power Management is kde-plasma/powerdevil. Please check if kde-plasma/powerdevil[brightness-control] is enabled. That, then is using app-misc/ddcutil for external screen brightness control. I suspect sys-power/power-profiles-daemon or sys-power/tlp could also mess around with energy saving settings though.
(In reply to Andreas Sturmlechner from comment #5) > Power Management is kde-plasma/powerdevil. > > Please check if kde-plasma/powerdevil[brightness-control] is enabled. That, > then is using app-misc/ddcutil for external screen brightness control. Yes, this is set +. However I might need to re-state that the issue is with the laptop panel brightness, not the external monitor (My comment #1 addresses that). I'd first thought that it was when detaching from the dock+monitor that the setting went wrong, but I realised it's actually reset to the mystery 33% value every reboot. (I missed this at first because I always dock the laptop just after booting and starting Plasma, then undock it later. For whatever dumb reason I assumed the undocking switchover was what caused it.) FWIW the brightness plasmoid does not affect the external monitor brightness when docked, I didn't even know that it was supposed to do that. > I suspect sys-power/power-profiles-daemon or sys-power/tlp could also mess > around with energy saving settings though. Neither of these are installed.
