I've the same bug with gentoo on an ibook g4 12". I've used this overlay http://svn.hboeck.de/xgl-overlay That are my softwares version: ibook mambro # emerge -av libdrm mesa xorg-server xf86-video-ati compiz These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ] x11-libs/libdrm-2.0.2 USE="-debug" 0 kB [ebuild R ] media-libs/mesa-6.5.1_rc2-r20060908 USE="nptl -debug -doc -hard ened -motif" VIDEO_CARDS="radeon -mach64 -mga -none -r128 -s3virge -savage -tdfx -trident" 0 kB [2] [ebuild R ] x11-base/xorg-server-1.1.1-r2 USE="dri nptl sdl xorg -debug -dm x -ipv6 -kdrive -minimal -xprint" INPUT_DEVICES="evdev keyboard mouse -acecad -a iptek -calcomp -citron -digitaledge -dmc -dynapro -elo2300 -elographics -fpit -h yperpen -jamstudio -joystick -magellan -microtouch -mutouch -palmax -penmount -s paceorb -summa -tek4957 -ur98 -void" VIDEO_CARDS="radeon vesa -chips -cirrus -du mmy -epson -fbdev -glint -imstt -mach64 -mga -nv -r128 -s3 -s3virge -savage -sis usb -tdfx -trident -v4l -voodoo" 0 kB [2] [ebuild R ] x11-drivers/xf86-video-ati-6.6.2 USE="dri -debug" 0 kB [ebuild R ] x11-wm/compiz-0.0.13_pre20060902 USE="dbus svg" 0 kB [2] Total size of downloads: 0 kB Portage overlays: [1] /usr/local/portage [2] /usr/local/xgl-overlay Would you like to merge these packages? [Yes/No] These are my cpu information: ibook mambro # cat /proc/cpuinfo processor : 0 cpu : 7447A, altivec supported clock : 1199.999000MHz revision : 0.1 (pvr 8003 0101) bogomips : 73.47 timebase : 18432000 platform : PowerMac machine : PowerBook6,5 motherboard : PowerBook6,5 MacRISC3 Power Macintosh detected as : 287 (iBook G4) pmac flags : 0000001b L2 cache : 512K unified pmac-generation : NewWorld And finally this is my emerge --info: ibook mambro # emerge --info Portage 2.1-r2 (default-linux/ppc/ppc32/2006.1/G4, gcc-4.1.1, glibc-2.4-r3, 2.6.17-gentoo-r7 ppc) ================================================================= System uname: 2.6.17-gentoo-r7 ppc 7447A, altivec supported Gentoo Base System version 1.12.4 app-admin/eselect-compiler: [Not Present] dev-lang/python: 2.4.3-r1 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: [Not Present] dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.13-r3 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r4 ACCEPT_KEYWORDS="ppc" AUTOCLEAN="yes" CBUILD="powerpc-unknown-linux-gnu" CFLAGS="-mcpu=7400 -O2 -pipe -maltivec -mabi=altivec" CHOST="powerpc-unknown-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/" CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-mcpu=7400 -O2 -pipe -maltivec -mabi=altivec" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LANG="it_IT.UTF-8" LC_ALL="it_IT.UTF-8" LINGUAS="it" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage /usr/local/xgl-overlay" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="ppc X aac aalib alsa altivec apm audiofile bash-completion berkdb bitmap-fonts bluetooth bonobo browserplugin bzip2 cairo cdr cli crypt cups dbus dlloader dri dvd dvdread encode esd fbcon firefox flac footmaticdb fortran freetype ftp gdbm gif gnome gphoto2 gpm gstreamer gtk gtk2 gtkhtml hal icq ipod isdnlog jabber java javascript jikes joystick jpeg kdexdeltas ldap libcaca libg++ libwww live mad mhash mikmod mp3 mpeg msn musepack musicbrainz mysql nautilus ncurses nls nptl nptlonly nsplugin offensive ogg opengl pam pcre pda pdflib perl php pic plotutils png pppd python qt3 qt4 quicktime readline reflection ruby samba sdl session sox spell spl ssl stream svg tcpd tetex theora timidity truetype truetype-fonts type1-fonts udev unicode usb vorbis wifi wma wxwindows x264 xine xml xml2 xmms xorg xosd xv xvid zlib elibc_glibc input_devices_keyboard input_devices_mouse input_devices_evdev kernel_linux linguas_it userland_GNU video_cards_radeon video_cards_vesa" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS fo