Since Kernel 3.2 X is not starting anymore with the following messages: Feb 27 08:59:57 tp kernel: fglrx_pci 0000:01:00.0: irq 52 for MSI/MSI-X Feb 27 08:59:57 tp kernel: [fglrx] Firegl kernel thread PID: 8152 Feb 27 08:59:57 tp kernel: [fglrx] Firegl kernel thread PID: 8153 Feb 27 08:59:57 tp kernel: [fglrx] Firegl kernel thread PID: 8154 Feb 27 08:59:57 tp kernel: [fglrx] IRQ 52 Enabled Feb 27 08:59:57 tp kernel: NMI: PCI system error (SERR) for reason a1 on CPU 0. Feb 27 08:59:57 tp kernel: Dazed and confused, but trying to continue Feb 27 08:59:57 tp kernel: DRHD: handling fault status reg 3 Feb 27 08:59:57 tp kernel: DMAR:[DMA Write] Request device [01:00.0] fault addr 22cb8e000 Feb 27 08:59:57 tp kernel: DMAR:[fault reason 01] Present bit in root entry is clear Feb 27 08:59:58 tp kernel: DRHD: handling fault status reg 3 Feb 27 08:59:58 tp kernel: DMAR:[DMA Write] Request device [01:00.0] fault addr 22cb8e000 Feb 27 08:59:58 tp kernel: DMAR:[fault reason 01] Present bit in root entry is clear Feb 27 08:59:58 tp kernel: [fglrx] Gart USWC size:1279 M. Feb 27 08:59:58 tp kernel: [fglrx] Gart cacheable size:508 M. Feb 27 08:59:58 tp kernel: [fglrx] Reserved FB block: Shared offset:0, size:1000000 Feb 27 08:59:58 tp kernel: [fglrx] Reserved FB block: Unshared offset:fbfa000, size:401000 Feb 27 08:59:58 tp kernel: [fglrx] Reserved FB block: Unshared offset:fffb000, size:5000 Feb 27 08:59:58 tp kernel: DRHD: handling fault status reg 2 Feb 27 08:59:58 tp kernel: DMAR:[DMA Read] Request device [01:00.0] fault addr 21e481000 Feb 27 08:59:58 tp kernel: DMAR:[fault reason 01] Present bit in root entry is clear Feb 27 09:00:25 tp kdm[8145]: X server startup timeout, terminating With Kernel 3.1.6 no problems Graphics driver is ati-drivers (fglrx) ATI Mobility Radeon HD 3400 Series Xorg 7.4 xorg-server 1.11.2-r2 Reproducible: Always Portage 2.1.10.44 (default/linux/amd64/10.0/desktop/kde, gcc-4.5.3, glibc-2.13-r4, 3.1.6-gentoo-mhe-thinkpad-64 x86_64) ================================================================= System uname: Linux-3.1.6-gentoo-mhe-thinkpad-64-x86_64-Intel-R-_Core-TM-2_Duo_CPU_P8400_@_2.26GHz-with-gentoo-2.0.3 Timestamp of tree: Mon, 27 Feb 2012 05:45:01 +0000 distcc 3.1 x86_64-pc-linux-gnu [enabled] app-shells/bash: 4.1_p9 dev-java/java-config: 2.1.11-r3 dev-lang/python: 2.7.2-r3, 3.2.2 dev-util/cmake: 2.8.6-r4 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.0.3 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.11.1 sys-devel/binutils: 2.21.1-r1 sys-devel/gcc: 4.5.3-r2 sys-devel/gcc-config: 1.4.1-r1 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r1 sys-kernel/linux-headers: 3.2 (virtual/os-headers) sys-libs/glibc: 2.13-r4 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=core2 -ftree-vectorize -floop-interchange -floop-strip-mine -floop-block -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /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=core2 -ftree-vectorize -floop-interchange -floop-strip-mine -floop-block -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests binpkg-logs distcc distlocks ebuild-locks fixlafiles news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch" FFLAGS="" GENTOO_MIRRORS="http://de-mirror.org/distro/gentoo/ http://gentoo.binarycompass.org http://gentoo.tiscali.nl/" LANG="en.US.UTF-8" LC_ALL="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="de" MAKEOPTS="-j11" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 amr amrnb berkdb blas bluetooth branding bzip2 cairo cdda cdr cli clucene consolekit cracklib crypt css cups cupsddk cxx dbus declarative dri dts dvd dvdr emboss encode exif extensions extras f77 faac faad fam ffmpeg firefox firefox3 flac fontconfig fortran fts3 furigana gd gdbm gdu geolocation gif gnutls gpm graphite gtk hal hbci ibmacpi iconv icu id3 id3tag ipv6 java jpeg kde kipi kpathsea laptop lastfm lcms libnotify mad mdnsresponder-compat mmx mmxext mng modules mozilla mp3 mp4 mpeg mudflap multilib ncurses nls nptl nptlonly nsplugin ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pppd ps qt3support qt4 readline samba sdl semantic-desktop session smapi smp spell sql sqlite3 sse sse2 sse3 ssl ssse3 startup-notification subtitles svg sysfs tcpd theora thinkpad threads tiff truetype udev unicode usb vim-syntax vorbis webkit wifi x264 xcb xcomposite xinerama xml xorg xscreensaver xulrunner xv xvid xvmc zeroconf zip zlib" 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" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="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 stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" 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 ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fglrx" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Please retest without proprietary video driver.
Tested without loading fglrx module. X starts now.
We'll, support for the kernel does not include proprietary closed source binaries. Have you search online in places such as phoronix or other sites for people experiencing the same issues? Good luck.
I just found out that disabling IOMMU with kernel option intel_iommu=off fixed it.