When the microcode is upgraded with the 20140913 package, the boot init halts at "Waiting for uevents to be processed". A "dmesg -H" yields: [ +0.065731] microcode: CPU0 sig=0x306c3, pf=0x2, revision=0x17 [ +0.001547] microcode: CPU0 updated to revision 0x1c, date = 2014-07-03 [ +0.000014] microcode: CPU1 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000017] microcode: CPU1 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000809] microcode: CPU1 updated to revision 0x1c, date = 2014-07-03 [ +0.000005] microcode: CPU2 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000013] microcode: CPU2 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000775] microcode: CPU2 updated to revision 0x1c, date = 2014-07-03 [ +0.000005] microcode: CPU3 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000010] microcode: CPU3 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000777] microcode: CPU3 updated to revision 0x1c, date = 2014-07-03 [ +0.000003] microcode: CPU4 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000010] microcode: CPU4 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000773] microcode: CPU4 updated to revision 0x1c, date = 2014-07-03 [ +0.000007] microcode: CPU5 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000015] microcode: CPU5 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000773] microcode: CPU5 updated to revision 0x1c, date = 2014-07-03 [ +0.000008] microcode: CPU6 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000020] microcode: CPU6 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000810] microcode: CPU6 updated to revision 0x1c, date = 2014-07-03 [ +0.000007] microcode: CPU7 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000021] microcode: CPU7 sig=0x306c3, pf=0x2, revision=0x17 [ +0.000813] microcode: CPU7 updated to revision 0x1c, date = 2014-07-03 [ +0.001001] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba [ +0.000029] traps: systemd-udevd[343] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 [ +0.000003] traps: systemd-udevd[345] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 [ +0.000002] traps: systemd-udevd[342] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 [ +0.000002] traps: systemd-udevd[334] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 [ +0.000001] in libpthread-2.20.so[7f39cea13000+16000] [ +0.000001] in libpthread-2.20.so[7f39cea13000+16000] [ +0.000001] in libpthread-2.20.so[7f39cea13000+16000] [ +0.000005] in libpthread-2.20.so[7f39cea13000+16000] [ +0.000096] traps: systemd-udevd[336] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 in libpthread-2.20.so[7f39cea13000+16000] [ +0.000086] traps: systemd-udevd[338] trap invalid opcode ip:7f39cea1e96a sp:7fff663e1c08 error:0 in libpthread-2.20.so[7f39cea13000+16000] [ +0.000073] traps: systemd-udevd[306] trap invalid opcode ip:7f39cea1e96a sp:7fff663e3d58 error:0 in libpthread-2.20.so[7f39cea13000+16000] From what I gather: The issue is TSX is disabled with this microcode and glibc is compiled make use of TSX. Please refer to: https://bugzilla.redhat.com/show_bug.cgi?id=1146311 https://bugzilla.redhat.com/show_bug.cgi?id=1146749 Options are: A. Don't update to microcode data >=20140913 B. Update microcode early during the kernel loading sequence C. Disable TSX usage in glibc Associated packages installed are: sys-fs/udev-217 sys-libs/glibc-2.20 Reproducible: Always Steps to Reproduce: 1. Update to sys-apps/microcode-data-20140913 2. Reboot 3. # emerge --info Portage 2.2.14 (python 2.7.8-final-0, default/linux/amd64/13.0/no-multilib, gcc-4.8.3, glibc-2.20, 3.16.7-gentoo x86_64) ================================================================= System uname: Linux-3.16.7-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E3-1240_v3_@_3.40GHz-with-gentoo-2.2 KiB Mem: 32929088 total, 29095808 free KiB Swap: 15625212 total, 15625212 free Timestamp of tree: Wed, 26 Nov 2014 19:00:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 distcc 3.2rc1 x86_64-pc-linux-gnu [enabled] app-shells/bash: 4.3_p30-r1 dev-lang/perl: 5.20.1-r2 dev-lang/python: 2.7.8, 3.3.5-r1, 3.4.2 dev-util/pkgconfig: 0.28-r2 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.13.6 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6-r1, 1.14.1 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.8.3 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.3-r2 sys-devel/make: 4.1-r1 sys-kernel/linux-headers: 3.16 (virtual/os-headers) sys-libs/glibc: 2.20 Repositories: gentoo Personal_Portage ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=core-avx2 -msahf -mabm --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=8192 -mtune=core-avx2" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=core-avx2 -msahf -mabm --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=8192 -mtune=core-avx2" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distcc 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" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://gentoo.gg3.net/ http://ftp.iij.ad.jp/pub/linux/gentoo/ http://ftp.jaist.ac.jp/pub/Linux/Gentoo/" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j21 -l4" 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="/var/lib/personal_portage" SYNC="rsync://nexus/gentoo-portage" USE="acl acpi amd64 berkdb bzip2 cli cracklib crypt cxx dri fortran gdbm iconv ipv6 lm_sensors mmx modules ncurses nls nptl openmp pam pcre readline samba session sse sse2 sse3 ssl ssse3 tcpd threads unicode zlib" 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" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
*** Bug 531528 has been marked as a duplicate of this bug. ***
I believe this bug and #528712 are also duplicates. Meanwhile #531528 actually has a patch to actually fix this issue.
*** Bug 541862 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 528712 ***