When using glamor as supplied by the glamor package or xorg-server versions older than 1.17, sometimes glyphs in text are not displayed correctly. It happens rather frequently, that instead a different character gets displayed, or that something gets visualized that looks like a readout of uninitialized memory. It sometimes helps to select the text that isn't shown correctly. The wrong characters are then replaced by the correct ones. Nevertheless this doesn't always work. I don't think it is caused by my GPU driver, but just for info, I'm currently running the radeonsi driver from Mesa 10.4.2 on a Radeon R9 270X. Reproducible: Sometimes Steps to Reproduce: 1. Install xorg-server version older than 1.17 with the glamor USE flag 2. Install open source Mesa GPU drivers 3. Configure X11 to use glamor 2D accelleration (that's the default - and only option - with radeonsi cards) 4. Browse the web with Firefox for some time. Go to a lot of websites that use different fonts. 5. Check if all characters are displayed correctly. Actual Results: Some characters are replaced by other characters or data that looks like uninitialized memory. Expected Results: Text should render correctly. The issue is not present with the latest xorg-server version 1.17.
Please post your `emerge --info x11-base/xorg-server x11-base/xorg-drivers' output in a comment.
I have the same issue. VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV770 [Radeon HD 4850] Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] MSI Radeon HD 4850 512MB GDDR3 Kernel driver in use: radeon Kernel modules: radeon emerge --info x11-base/xorg-server x11-base/xorg-drivers Portage 2.2.15 (python 3.3.5-final-0, default/linux/amd64/13.0, gcc-4.9.2, glibc-2.20-r1, 3.19.0-rc7 x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.19.0-rc7-x86_64-AMD_Athlon-tm-_II_X2_240_Processor-with-gentoo-2.2 KiB Mem: 4047448 total, 2089348 free KiB Swap: 7103480 total, 7103480 free Timestamp of tree: Fri, 06 Feb 2015 12:15:01 +0000 sh bash 4.3_p33-r1 ld GNU ld (Gentoo 2.24 p1.4) 2.24 ccache version 3.2.1 [enabled] app-shells/bash: 4.3_p33-r1 dev-java/java-config: 2.2.0 dev-lang/perl: 5.20.1-r4 dev-lang/python: 2.7.9-r1, 3.3.5-r1, 3.4.2 dev-util/ccache: 3.2.1-r1 dev-util/cmake: 3.1.0 dev-util/pkgconfig: 0.28-r2 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.13.9 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.10.3-r1, 1.11.6-r1, 1.12.6, 1.15 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.9.2 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.5 sys-devel/make: 4.1-r1 sys-kernel/linux-headers: 3.18 (virtual/os-headers) sys-libs/glibc: 2.20-r1 Repositories: gentoo overlay_jl ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" 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 /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" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--autounmask-write=y --keep-going --quiet-build=y" FCFLAGS="-march=native -O2 -pipe" FEATURES="assume-digests binpkg-logs ccache config-protect-if-modified 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="-march=native -O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="de_DE.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.de.gentoo.org/gentoo-portage" USE="3dnow 3dnowext 64bit X Xaw3d a52 aac aacplus aacs aalib ace acl acpi activefilter aften alsa amd64 ap apm apng archive async audacious audiofile automount bazaar berkdb binary-drivers binfilter blender-game bluetooth bluray boost bzip2 bzr cairo canusb ccache cdda cddb cdio cdparanoia cdr cdrdao cdrom cgi charconv chm chroot city cjk clang cleartype cli colordiff colors compress consolekit corefonts cpio cracklib crypt css cue cups curl curlwrappers cvs cxx daemon dbus declarative device-mapper dga dhcp doom doomsday dos download-subs dri dri3 dts dump dv dvb dvd dvdnav eap eap-sim eap-tls ebook egl emerald emoticon enca encode enscript equalizer exif extensions extras faac faad fam fat fax fbcon ffmpeg fftw firefox flac fluidsynth fontconfig foomaticdb fortran freedoom ftp fts3 fuse g3dvl gallium gbm gd gdbm gdu geoip gif gimp git glamor glut gme gnutls gphoto2 gpm graphite gsm gstreamer gtk gtk3 gudev gui gzip hddtemp hdf hdf5 heretic hexen highlight hpcups hpijs http hwdb iconv icq icu id3 id3tag idn imagemagick introspection ios ipc ipod ipv6 jack java javascript jit jpeg jpeg2k kate kde keymap ladspa lame laptop lcms lensfun lha libass libcaca libcanberra libkms libnl libnotify libsamplerate libssh2 libtiger libv4l libv4l2 libwww llvm-shared-libs lm_sensors logrotate lua lxde lzma lzo mad madwifi magic man matroska md5sum metalink midi mikmod mime minizip mixer mjpeg mmap mms mmx mmxext mng mobi mod modplug modules mono mouse mozilla mp3 mp4 mpeg mpeg2 mplayer mtp multilib multislot musepack musicbrainz nano-syntax ncat ncurses ndiff network nfs nfsidmap nfsv3 nfsv4 nfsv41 nls nmap nmap-update nokia normalize nowlistening nping nptl nsplugin ntfs ntfsprogs ntp nvidia nvram obex ocr ogg ogm openal opencl opengl openmax openmp openssl optimized-qmake oscar osdmenu otr p2p pam pango panorama parport parse-clocks pcap pci pcre pdf pdfimport phonon pipes plasma plugins pm-utils pmu png policykit postscript ppds privacy projectm projectx pulseaudio pvr python python3 qalculate qt3support qt4 quicktime r600-llvm-compiler radio rar raw rdesktop readline recording redeyes reiser4 reiserfs remote-access remoteosd replaygain rpm rtc rtmp rtsp rubberband samba sbsms scanner schroedinger sdl secure-delete semantic-desktop sensord session sftp sha512 shorten shout skins slang smbclient smi sndfile snowberry sockets sound soundtouch sox speex spell sql sqlite sqlite3 sse sse2 sse3 sse4 ssh ssl startup-notification statistics stk stream subtitles subversion svg swat symlink syslog szip taglib tcpd texteffect tftp theora threads thumbnail tiff translator truetype twolame udev udisks unicode upcall upower urlpicpreview usb v4l vaapi vamp vcd vcdx vdpau video videos vim-syntax virtualbox vlm vnc vorbis vpx vroot vst wad wav wavpack webgl webkit webm webpresence wifi winbind winpopup wireshark wmf wps wxwidgets x264 x265 xa xattr xcb xcomposite xfs xine xinerama xinetd xml xmp xorg xosd xpm xrandr xscreensaver xv xvid xvmc zenmap zip zlib zvbi" ABI_X86="64" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="3dnow 3dnowext mmx mmxext popcnt sse sse2 sse3 sse4a" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="evdev keyboard mouse joystick" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="de" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python3_3" PYTHON_TARGETS="python2_7 python3_3 python3_4" RUBY_TARGETS="ruby19 ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="fbdev vesa svga vga radeon v4l modesetting r100 r200 r300 r600 nouveau" 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: CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON ================================================================= Package Settings ================================================================= x11-base/xorg-server-1.16.3-r1 was built with the following: USE="glamor ipv6 nptl suid udev xorg -dmx -doc -kdrive -minimal (-selinux) -static-libs -systemd -tslib -unwind -wayland -xnest -xvfb" ABI_X86="64" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,lazy" x11-base/xorg-drivers-1.16 was built with the following: USE="" ABI_X86="64" INPUT_DEVICES="evdev joystick keyboard mouse -acecad -aiptek -elographics -fpit -hyperpen -mutouch -penmount -synaptics -tslib -vmmouse -void -wacom" VIDEO_CARDS="fbdev modesetting nouveau radeon v4l vesa -apm -ast -chips -cirrus -dummy -epson -fglrx -freedreno -geode -glint -i128 -i740 -intel -mach64 -mga -neomagic -nv -nvidia -omap -omapfb -qxl -r128 -radeonsi -rendition -s3 -s3virge -savage -siliconmotion -sisusb -sunbw2 -suncg14 -suncg3 -suncg6 -sunffb -sunleo -suntcx -tdfx -tga -trident -tseng -via -virtualbox -vmware -voodoo" I will test with 1.17.
