In my user fonts.conf file configured via KDE: .fonts.conf -> /home/<username>/.config/fontconfig/fonts.conf , when I have antialias turned off and font hinting enabled, www-client/chromium-60.0.3112.78 ignores that and turns off font hinting which makes some letters look bolded and some unbolded. www-client/google-chrome-60.0.3112.101 and www-client/chromium-59.0.3071.104 correctly keep hinting enabled. At first I thought it was my installed fonts, or outdated font rendering libraries so I updated them, but then I realised that google chrome-60 renders the same fonts "Times New Roman", "Arial", and "Monospace" fine. Then I tried with another user in KDE that doesn't get used often to make sure it wasn't just my profile having problems, and it had the same results after setting antialias to false and hinting to true. I haven't tried a new user with Gnome though or a completely new from scratch Gentoo as both Chromium 59 and Google-Chrome 60 render okay and they have the gtk3 flag. Also, /proc/<google-chrome-pid>/maps shows the same libraries loaded and strace shows similar font files and configs being loaded. I also, tried compiling chromium-60 with CFLAGS set to just "-O2 -pipe" and LDFLAGS="", but that made no difference. I also tried with antialias enabled as that is a common solution, but it seems to cause me eyestrain on my laptop. Here is the emerge info of each version to show the use flags applied: [ebuild R ] www-client/chromium-59.0.3071.104::gentoo USE="cups gconf gnome-keyring gtk3 hangouts (pic) proprietary-codecs pulseaudio widevine -component-build -custom-cflags -kerberos (-neon) (-selinux) -suid -system-ffmpeg (-system-libvpx) (-tcmalloc) {-test}" L10N="am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW" 0 KiB [ebuild U ] www-client/chromium-60.0.3112.78::gentoo [59.0.3071.104::gentoo] USE="cups gnome-keyring hangouts (pic) proprietary-codecs pulseaudio widevine -component-build -custom-cflags -kerberos (-neon) (-selinux) -suid -system-ffmpeg (-system-libvpx) (-tcmalloc) {-test} (-gconf%*) (-gtk3%*)" L10N="am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW" 0 KiB [ebuild R ] www-client/google-chrome-60.0.3112.101::gentoo USE="plugins" L10N="am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW" 0 KiB Info about some other packages: [ebuild R ] media-libs/freetype-2.8:2::gentoo USE="X adobe-cff bzip2 png -bindist -cleartype_hinting -debug -doc -fontforge -harfbuzz -infinality -static-libs -utils" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild R ] media-libs/fontconfig-2.11.1-r2:1.0::gentoo USE="-doc -static-libs" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild R ] x11-libs/gtk+-3.22.16:3::gentoo USE="X colord cups introspection xinerama (-aqua) -broadway -cloudprint -examples {-test} -vim-syntax -wayland" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild R ] media-libs/harfbuzz-1.4.6-r2:0/0.9.18::gentoo USE="cairo fontconfig glib graphite icu introspection truetype -debug -static-libs {-test}" ABI_X86="32 (64) (-x32)" 0 KiB My emerge --info: Portage 2.2.28 (python 2.7.5-final-0, default/linux/amd64/13.0/desktop/plasma, gcc-5.4.0, glibc-2.23-r4, 4.9.31-gentoo x86_64) ================================================================= System uname: Linux-4.9.31-gentoo-x86_64-Intel-R-_Core-TM-_i7-4700HQ_CPU_@_2.40GHz-with-gentoo-2.1 KiB Mem: 16288628 total, 3451736 free KiB Swap: 20971512 total, 20970044 free Timestamp of repository gentoo: Thu, 17 Aug 2017 13:45:01 +0000 sh bash 4.2_p53 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.2_p53::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.12.4-r1::gentoo dev-lang/python: 2.6.8::gentoo, 2.7.5-r2::gentoo, 3.1.2-r3::gentoo, 3.2.5-r2::gentoo, 3.3.2-r2::gentoo, 3.4.1::gentoo dev-util/cmake: 3.7.2::gentoo dev-util/pkgconfig: 0.28-r1::gentoo sys-apps/baselayout: 2.1-r1::gentoo sys-apps/openrc: 0.13.11::gentoo sys-apps/sandbox: 2.6-r1::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.8.5-r4::gentoo, 1.9.6-r3::gentoo, 1.10.3::gentoo, 1.11.1::gentoo, 1.12.6::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.4.5::gentoo, 4.5.3-r1::gentoo, 4.6.3::gentoo, 4.8.3::gentoo, 4.9.3::gentoo, 5.4.0-r3::gentoo sys-devel/gcc-config: 1.7.3::gentoo sys-devel/libtool: 2.4.6::gentoo sys-devel/make: 3.82-r4::gentoo sys-kernel/linux-headers: 4.4::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r4::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync/gentoo-portage priority: -1000 bumblebee location: /var/lib/layman/bumblebee masters: gentoo priority: 0 crossdev location: /usr/local/portage masters: gentoo priority: 1 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=haswell -fomit-frame-pointer -ftree-vectorize -fpredictive-commoning -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/maven-bin-2.2/conf /usr/share/maven-bin-3.0/conf /usr/share/themes/oxygen-gtk/gtk-2.0 /var/lib/hsqldb" 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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -march=haswell -fomit-frame-pointer -ftree-vectorize -fpredictive-commoning -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.internode.on.net/pub/gentoo http://mirror.3fl.net.au/pub/gentoo ftp://gentoo.mirrors.pair.com/ ftp://mirrors.tds.net/gentoo http://mirrors.tds.net/gentoo" LANG="en_AU.utf8" LDFLAGS="-Wl,--as-needed" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" 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 acl acpi activities alsa amd64 apache2 arts avahi berkdb bluetooth branding bzip2 cairo caps cdda cdr cjk cli consolekit cracklib crypt cups cxx dbus declarative divx4linux dlloader dri dts dv dvd dvdr emboss encode exif faac fam firefox flac fortran gdbm gif glamor gnome gnutls gpm gstreamer gtk guile hal howl htmlhandbook iconv ieee1394 ipv6 jikes joystick jpeg jpeg2k kde kdeenablefinal kdehiddenvisibility kipi kwallet lcms ldap libnotify logrotate mad matroska mmx mng modules mp3 mp4 mpeg multilib nas ncurses net nls nptl odbc ogg openexr opengl openmp pam pango pcre pdf phonon physfs plasma png policykit povray ppds pulseaudio qml qt3support qt4 qt5 readline samba scanner sdl seccomp semantic-desktop session slp speex spell sse sse2 sse3 ssl ssse3 startup-notification svg tcpd tetex theora threads tiff truetype udev udisks unicode upower usb vorbis widgets wmf wxwidgets x264 xattr xcb xcomposite xinerama xml xml2 xscreensaver xv xvid zeroconf zlib" ABI_X86="64 32" ALSA_CARDS="intel8x0 intel8x0m via82xx usb-audio hda-intel" 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="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 ssse3 avx fma3 sse4_1 sse4_2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64 pc qemu" INPUT_DEVICES="evdev keyboard mouse synaptics linuxinput ps2mouse joystick wacom" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_GB en_US en_AU zh_CN" LIRC_DEVICES="devinput mceusb mceusb2 atilibusb atiusb" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby21 ruby22" USERLAND="GNU" VIDEO_CARDS="fbdev nv v4l vesa nvidia nouveau intel radeon i915 i965" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
It looks like this issue is fixed in www-client/chromium-61.0.3163.49
Please consider building chromium locally and bisecting - see https://chromium.googlesource.com/chromium/src/+/lkcr/docs/linux_build_instructions.md .
M61 is stable now, closing.
