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Bug 733394

Summary: gnome-base/gnome-3.36.0 : brightness fails to change with an Intel GPU while slider bar does indicate
Product: Gentoo Linux Reporter: Iñigo <alvarezviu>
Component: Current packagesAssignee: Gentoo Linux Gnome Desktop Team <gnome>
Status: UNCONFIRMED ---    
Severity: normal    
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard:
Package list:
Runtime testing required: ---

Description Iñigo 2020-07-21 07:37:07 UTC
While using the brightness multimedia keys the brightness bar will move left and right correctly, but the actual brightness won't change. Using xbrightness works fine, and other DE work as intended too. There is no change on the results using X11 or Wayland.

Using Intel integrated graphics.

Reproducible: Always

Steps to Reproduce:
1.press brightness control key
2.
3.
Actual Results:  
Brightness stays the same

Expected Results:  
Brightness should increase or decrease
Comment 1 Mart Raudsepp gentoo-dev 2020-07-30 10:40:14 UTC
Please post your emerge --info
Comment 2 Iñigo 2020-07-30 11:47:28 UTC
emerge --info gnome
Portage 3.0.1 (python 3.7.8-final-0, default/linux/amd64/17.1/desktop/gnome, gcc-10.2.0, glibc-2.31-r6, 5.7.10-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-5.7.10-gentoo-x86_64-Intel-R-_Core-TM-_i5-6300U_CPU_@_2.40GHz-with-gentoo-2.7
KiB Mem:    16270928 total,   4766804 free
KiB Swap:    3929084 total,   3929084 free
Timestamp of repository gentoo: Thu, 30 Jul 2020 05:00:01 +0000
Head commit of repository gentoo: d5a8c3775420a5ee62c230ece2c36b97aed0f808
sh bash 5.0_p18
ld GNU ld (Gentoo 2.34 p4) 2.34.0
app-shells/bash:          5.0_p18::gentoo
dev-java/java-config:     2.3.1::gentoo
dev-lang/perl:            5.30.3-r1::gentoo
dev-lang/python:          2.7.18-r1::gentoo, 3.7.8-r2::gentoo, 3.8.5::gentoo, 3.9.0_beta5::gentoo
dev-util/cmake:           3.18.0::gentoo
sys-apps/baselayout:      2.7::gentoo
sys-apps/openrc:          0.42.1::gentoo
sys-apps/sandbox:         2.20::gentoo
sys-devel/autoconf:       2.13-r1::gentoo, 2.69-r5::gentoo
sys-devel/automake:       1.16.2::gentoo
sys-devel/binutils:       2.34-r1::gentoo
sys-devel/gcc:            10.2.0::gentoo
sys-devel/gcc-config:     2.3.1::gentoo
sys-devel/libtool:        2.4.6-r6::gentoo
sys-devel/make:           4.3::gentoo
sys-kernel/linux-headers: 5.7::gentoo (virtual/os-headers)
sys-libs/glibc:           2.31-r6::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-max-age: 24
    sync-rsync-verify-metamanifest: yes
    sync-rsync-extra-opts: 

haarp
    location: /var/lib/layman/haarp
    masters: gentoo
    priority: 50

steam-overlay
    location: /var/lib/layman/steam-overlay
    masters: gentoo
    priority: 50

thegreatmcpain
    location: /var/lib/layman/thegreatmcpain
    masters: gentoo
    priority: 50

winny
    location: /var/lib/layman/winny
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/var/cache/distfiles"
ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY 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"
FCFLAGS="-march=native -O2 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=native -O2 -pipe"
GENTOO_MIRRORS="ftp://mirror.bytemark.co.uk/gentoo/ https://mirror.bytemark.co.uk/gentoo/ http://mirror.bytemark.co.uk/gentoo/ rsync://mirror.bytemark.co.uk/gentoo/ http://mirrors.evowise.com/gentoo/ https://mirrors.evowise.com/gentoo/ https://www.mirrorservice.org/sites/distfiles.gentoo.org/ http://www.mirrorservice.org/sites/distfiles.gentoo.org/ ftp://ftp.mirrorservice.org/sites/distfiles.gentoo.org/ rsync://rsync.mirrorservice.org/distfiles.gentoo.org/"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j3"
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="/var/tmp"
USE="X a52 aac aalib acl acpi alsa amd64 berkdb bindist bluetooth branding bzip2 cairo cdda cdr cli colord crypt cups dbus dri dts dvd dvdr eds egl elogind emboss encode evo exif fbcon flac fortran gdbm gif gnome gnome-keyring gnome-online-accounts gpm gstreamer gtk highlight iconv icu introspection ipv6 jpeg lcms ldap libcaca libnotify libsecret libtirpc mad mng mp3 mp4 mpeg multilib nautilus ncurses networkmanager nls nptl ogg opengl openmp pam pango pcre pdf png policykit ppds pulseaudio qt5 readline sdl seccomp spell split-usr ssl startup-notification svg tcpd threads tiff tracker truetype udev udisks unicode upower usb vorbis vulkan vulkan-overlay wayland wxwidgets x264 xattr xcb xml xv xvid zlib zsh-completion" ABI_X86="32 64" ADA_TARGET="gnat_2018" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache 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="mmx mmxext sse sse2 aes avx avx2 f16c fma3 pclmul popcnt sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2 php7-3" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_7" PYTHON_TARGETS="python2_7 python3_7" RUBY_TARGETS="ruby25" USERLAND="GNU" VIDEO_CARDS="intel i965 iris" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

=================================================================
                        Package Settings
=================================================================

gnome-base/gnome-3.34.4::gentoo was built with the following:
USE="bluetooth classic cups extras -accessibility" ABI_X86="(64)"
Comment 3 Mart Raudsepp gentoo-dev 2020-07-30 11:55:55 UTC
Likely a elogind issue
Comment 4 Rodrigo Kochenburger 2020-10-11 02:11:49 UTC
I have the same exact issue w/ my Dell XPS 9700.

I initially reported the issue to Gnome but their response pointed back to systemd, or in this case elogind.

https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/issues/552
Comment 5 Rodrigo Kochenburger 2020-10-11 21:45:33 UTC
Today, while doing some more research into this issue, I found this elogind issue: https://github.com/elogind/elogind/issues/158

It looks like the issue is caused by gnome-settings-daemon and systemd changes, and elogind lagging behind.

There is a patch to gnome-settings-daemon, which addresses the issue, though.