Scrolling spikes one CPU-core to 100%. Redrawing the terminal (tested xterm, urxvt and VTE) is extremly slow and often not complete, only half the page gets updated (visible especially when switching tabs in tmux/screen). Also when I lock the screen (currently using xlockmore) I can see the desktop when waking up the screen again. I also had my webbrowser show the wrong tab content after tab switch for a second or two. 2.99.917_p20160704 is the last working version for me, any newer snapshot shows those issues. I played with different USE-Flags, especially I enabled dri3 for the latest version. But nothing helps. Graphics card (according to lspci): 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (integrated GPU in my Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz) I did several kernel updates since this issue showed up the first time. Currently I'm running gentoo-sources-4.7.4. If there is any special info you need please tell me. ==== emerge --info: Portage 2.3.0 (python 3.4.3-final-0, default/linux/amd64/13.0/desktop, gcc-4.9.3, glibc-2.23-r2, 4.7.4-gentoo x86_64) ================================================================= System uname: Linux-4.7.4-gentoo-x86_64-Intel-R-_Core-TM-_i3-2350M_CPU_@_2.30GHz-with-gentoo-2.2 KiB Swap: 5242876 total, 5242876 free Timestamp of repository gentoo: Fri, 16 Sep 2016 07:06:46 +0000 sh bash 4.3_p46 ld GNU ld (Gentoo 2.26.1 p1.0) 2.26.1 distcc 3.2rc1 x86_64-pc-linux-gnu [enabled] app-shells/bash: 4.3_p46::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.0-r1::gentoo dev-lang/python: 2.7.10-r1::gentoo, 3.4.3-r1::gentoo, 3.5.2::gentoo dev-util/cmake: 3.6.2::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.2-r1::gentoo sys-apps/openrc: 0.21.7::gentoo sys-apps/sandbox: 2.10-r1::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.12.6::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo, 2.26.1::gentoo sys-devel/gcc: 4.9.3::gentoo sys-devel/gcc-config: 1.7.3::gentoo sys-devel/libtool: 2.4.6::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 4.3::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r2::gentoo Repositories: gentoo location: /var/repositories/gentoo sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo priority: -1000 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=sandybridge -mno-aes -O2 -pipe -ggdb" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /lib/modules /usr/share/config /usr/share/gnupg/qualified.txt" 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="-march=sandybridge -mno-aes -O2 -pipe -ggdb" DISTDIR="/var/distfiles" EMERGE_DEFAULT_OPTS="--quiet-build y --quiet-fail y" 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 split-log splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="de_DE.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j11" 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 alsa amd64 apm berkdb branding bzip2 cairo cdda cdr cli cracklib crypt cups cxx dbus directfb dri dts dvd dvdr emboss encode exif fam ffmpeg firefox flac fortran gdbm gif glamor gpm iconv infinality introspection ipv6 jpeg jpeg2k kipi lcdfilter lcms mad mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opengl openmp openrc pam pango pcre pdf png policykit ppds pulse pulseaudio readline sdl seccomp session spell sse sse2 sse3 sse4 sse4_1 ssl ssse3 svg systemd tcpd theora threads tiff truetype udev udisks unicode upower usb vaapi vorbis vpx x264 xattr xcb xcomposite xml xscreensaver xv xvid zlib zsh-completion" 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="krita sheets stage words" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="avx mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" ENLIGHTENMENT_MODULES="appmenu backlight battery bluez4 clock conf conf-applications conf-bindings conf-comp conf-dialogs conf-display conf-interaction conf-intl conf-menus conf-paths conf-performance conf-randr conf-shelves conf-theme conf-wallpaper2 conf-window-manipulation conf-window-remembers connman contact cpufreq everything fileman fileman-opinfo gadman ibar ibox lokker mixer msgbus music-control notification pager pager16 pager-plain quickaccess shot start syscon systray tasks teamwork temperature tiling winlist wizard xkbswitch wl-desktop-shell wl-drm wl-fb wl-text-input wl-wl wl-x11 xwayland lua_targets_51 lua_targets_53" 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 wacom" KERNEL="linux" L10N="de de-DE" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="de de_DE" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4 python3_4" RUBY_TARGETS="ruby21 ruby22" SANE_BACKENDS="epson epson2" USERLAND="GNU" VIDEO_CARDS="intel 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, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Do you use compton? I had similar issues with VTE (xterm) and the issue appears only when compton is active. This started to happen after August 2 so p20160704 is not affected but p20160803 and later yes. See [1] for details. The fix is to build compton from git, but it brings new issues (for me it was Firefox). I think it may happen on other compositors. [1] https://github.com/chjj/compton/issues/376
1. NOT security bug, this is the way x86 graphics hardware works (with all current drivers) 2. disable all compositing as requested and try again
Finally found the time to get back to this issue. Yes I am running compton. But I can't find a way to make it work. The suggested cmdline-invocation didn't help. Changing backends didn't help, xr_glx_hybrid made things worse - windows including the desktop just disappeared. I used compton mostly to get a tearfree desktop, because non-composited tearing is even worse than what I see with newer intel-driver... I hope glamor will finally fix this issue for me. I gave it a try and it seems to do a good job. xorg-server-1.19 is said to even further improve it.
