The backlight on a Lenovo ThinkPad P52 is no longer controllable after updating to x11-drivers/nvidia-drivers-525.60.11. When pressing the Fn key with the brightness + or brightness - button, KDE indicates the brightness is increased or decreased (so the Fn key combination is responding), but the brightness itself on the laptop screen does not increase or decrease. Reproducible: Always Steps to Reproduce: 1.Use a Lenovo ThinkPad P52 2.Use gentoo-sources-5.15.80 (or any other 5.15.x kernel) 3.Install x11-drivers/nvidia-drivers-525.60.11 4. Try to control the brightness using Fn with F5 and F6 Actual Results: The brightness does not increase or decrease Expected Results: The brightness increasing or decreasing I'm running gentoo-sources-5.15.80 as kernel and I set graphics card to discrete graphics card as only graphics card in the BIOS / UEFI configuration (as it as a MUX chip).
emerge --info emerge --info Portage 3.0.38.1 (python 3.10.8-final-0, default/linux/amd64/17.1/systemd/merged-usr, gcc-11.3.0, glibc-2.36-r5, 5.15.80-gentoo x86_64) ================================================================= System uname: Linux-5.15.80-gentoo-x86_64-Intel-R-_Core-TM-_i7-8750H_CPU_@_2.20GHz-with-glibc2.36 KiB Mem: 32600276 total, 28879216 free KiB Swap: 33554428 total, 33554428 free Timestamp of repository gentoo: Fri, 02 Dec 2022 07:00:01 +0000 Head commit of repository gentoo: 949802fe39591fc4b6861b77af127989fcfe9910 sh bash 5.1_p16-r2 ld GNU ld (Gentoo 2.38 p4) 2.38 app-misc/pax-utils: 1.3.5::gentoo app-shells/bash: 5.1_p16-r2::gentoo dev-java/java-config: 2.3.1::gentoo dev-lang/perl: 5.34.1-r4::gentoo dev-lang/python: 3.10.8_p3::gentoo, 3.11.0_p2::gentoo dev-lang/rust: 1.65.0::gentoo dev-util/cmake: 3.24.3::gentoo dev-util/meson: 0.63.3::gentoo sys-apps/baselayout: 2.9::gentoo sys-apps/sandbox: 2.29::gentoo sys-apps/systemd: 251.7::gentoo sys-devel/autoconf: 2.13-r7::gentoo, 2.71-r5::gentoo sys-devel/automake: 1.16.5::gentoo sys-devel/binutils: 2.38-r2::gentoo sys-devel/binutils-config: 5.4.1::gentoo sys-devel/clang: 15.0.3::gentoo sys-devel/gcc: 11.3.0::gentoo sys-devel/gcc-config: 2.8::gentoo sys-devel/libtool: 2.4.7::gentoo sys-devel/lld: 15.0.3::gentoo sys-devel/llvm: 15.0.3::gentoo sys-devel/make: 4.3::gentoo sys-kernel/linux-headers: 5.15-r3::gentoo (virtual/os-headers) sys-libs/glibc: 2.36-r5::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 sync-rsync-extra-opts: sync-rsync-verify-jobs: 1 sync-rsync-verify-max-age: 24 sync-rsync-verify-metamanifest: yes ACCEPT_KEYWORDS="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/lib64/libreoffice/program/sofficerc /usr/share/config /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="CARGO_HOME 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 XDG_STATE_HOME" FCFLAGS="-march=native -O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live 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="http://distfiles.gentoo.org" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j12" 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" SHELL="/bin/bash" USE="X a52 aac acl alsa amd64 audit bluetooth boost brotli bzip2 cacert cairo caps cli colord crypt cryptsetup cups curl dbus designer device-mapper dri dts dvd evdev ffmpeg flac fontforge fortran gdbm geoclue geolocation gif git glib gmp gpm gssapi gstreamer gtk gtk2 gtk4 harfbuzz ibus iconv icu idn introspection ipv6 jbig jpeg kde kerberos libglvnd libsamplerate libtirpc libvisual lz4 lzma mp3 mpeg multilib ncurses networkmanager nls nptl nss ogg openal openconnect opengl openmp opus pam pcre pcre16 pcre32 perl pkcs11 pkcs7 png policykit pulseaudio pwquality python qml qt5 readline rtmp samba sasl screencast sdl seccomp slang sndio sqlite ssh ssl svg systemd taglib test-rust theora tiff tpm truetype udev unicode unwind v4l vaapi vala vcd vorbis vpx vulkan wavpack wayland webengine webkit webp widgets x264 xattr xcb xinerama xml xscreensaver zlib zstd" ABI_X86="32 64" ADA_TARGET="gnat_2021" 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" CAMERAS="ptp2" 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 mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="evdev libinput" KERNEL="linux" L10N="en en-GB en-US nl ru" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_10" PYTHON_TARGETS="python3_10" RUBY_TARGETS="ruby27" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LEX, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS
Note: Downgrading to x11-drivers/nvidia-drivers-515.86.01 resolves the issue as a workaround, but due to several features being supported, I'd like to use the 525.xx drivers instead.
Sorry, I don't think there's anything I can do about this. It's become famous that some branches work and don't work for brightness depending on hardware, and I can't do anything about closed source drivers beside wait for the next release (I don't have affected hardware to test myself too). May want to try to report to nvidia instead.
May possibly be same as $URL, it's the most recent brightness related report anyway (there's been a lot on nvidia's forums). (In reply to Ionen Wolkens from comment #3) > closed source drivers Well, some bits are open now but not that development and ways to find regressions really are.
(In reply to Ionen Wolkens from comment #3) > May want to try to report to nvidia instead. Ah, see you already did: https://forums.developer.nvidia.com/t/brightness-on-a-lenovo-thinkpad-p52-no-longer-controllable-after-updating-nvidia-drivers-to-525-xx-series
Yes, I can understand that there's not a lot you can do. I reported it both here and on the NVIDIA forum, as I wasn't sure where I'd need to report it first. I compiled the driver without the open-gpu-kernel-driver by the way, as it's not supported on Pascal generation GPU's.
