On KDE Plasma 5, multihead displays do not work with my hardware. The primary display (DVI-0) works, the secondary display (CRT-1) shows only a background and unintentional artifacts from the primary display, such as cursor artifacts. Reproducible: Always Steps to Reproduce: 1.startx Actual Results: 2.KDE Plasma 5 starts on primary display, 3. Secondary display shows only a desktop. Mouse can move between displays, but app windows cannot be displayed, and there is no kpanel. Expected Results: 3. Second display should show a desktop, kpanel, and be able to host applicaiton windows. Nvidia settings detects displays correctly, as it did in KDE 4. XRandR shows the following: jesnow@Merckx ~ $ xrandr Screen 0: minimum 8 x 8, current 1280 x 1024, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm 1024x768 75.03 + 70.07 60.00 1600x1200 65.00 60.00 1400x1050 74.76 59.98 1280x1024 75.02 60.02* 1280x960 60.00 1152x864 75.00 832x624 74.55 800x600 75.00 72.19 60.32 56.25 700x525 74.76 59.98 640x480 75.00 72.81 59.94 512x384 70.07 60.00 400x300 72.19 320x240 72.81 60.05 HDMI-0 disconnected (normal left inverted right x axis y axis) KDE system settings shows the same. jesnow@Merckx ~ $ emerge --info Portage 2.3.0 (python 3.4.3-final-0, default/linux/x86/13.0/desktop/plasma, gcc-4.9.3, glibc-2.22-r4, 4.4.26-gentoo i686) ================================================================= System uname: Linux-4.4.26-gentoo-i686-Intel-R-_Core-TM-_i7_CPU_860_@_2.80GHz-with-gentoo-2.2 KiB Mem: 12461284 total, 4806628 free KiB Swap: 3905532 total, 3905280 free Timestamp of repository gentoo: Tue, 08 Nov 2016 19:45:01 +0000 sh bash 4.3_p48 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.3_p48::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.22.2::gentoo dev-lang/python: 2.7.10-r1::gentoo, 3.4.3-r1::gentoo dev-util/cmake: 3.5.2-r1::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.2::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, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::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: 2.22-r4::gentoo Repositories: gentoo location: /home/portage sync-type: rsync sync-uri: rsync://rsync.us.gentoo.org/gentoo-portage priority: -1000 Merckx location: /home/portage/local masters: gentoo priority: 0 ACCEPT_KEYWORDS="x86" ACCEPT_LICENSE="* -@EULA googleearth AdobeFlash-11.x dlj-1.1 skype-4.0.0.7-copyright" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=core2 -msse4 -pipe -mcx16 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib/libreoffice/program/sofficerc /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" CXXFLAGS="-O2 -march=core2 -msse4 -pipe -mcx16 -fomit-frame-pointer" DISTDIR="/home/portage/distfiles" FCFLAGS="-O2 -march=i686 -pipe" FEATURES="assume-digests binpkg-logs 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="-O2 -march=i686 -pipe" GENTOO_MIRRORS="http://gentoo.cites.uiuc.edu/pub/gentoo/ http://gentoo.mirrors.easynews.com/linux/gentoo/ ftp://mirror.fslutd.org/linux/distributions/gentoo/" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j10" PKGDIR="/home/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="/home/portage-tmp" USE="X a52 aac acpi alsa arts berkdb bmp branding bzip2 cairo cdda cdr cleartype cli consolekit corefonts cpudetection cracklib crypt cups cxx dbus declarative dga divx4linux dri dts dvd dvdr emboss encode exif fam ffmpeg firefox flac flash foomatic fortran gd gdbm gif gimp gimpprint glamor gtk hpcups iconv icu ipv6 java jpeg jpeg2k jpg kde kipi lcms ldap libnotify mad mmx mng modules mov mp3 mp4 mpeg mplayer mysql ncurses nls nptl nptlonly nsplugin nvidia ogg opengl openmp pam pango pcre pdf phonon plasma png policykit postscript ppds print python qml qt3support qt4 qt5 readline real samba sane scanner sdl seccomp session smp snmp spell sql sse sse2 sse3 ssl ssse3 startup-notification svg tcpd tiff tk truetype type1 udev udisks unicode usb vorbis wav webkit widgets win32codecs wmf wxwidgets x264 x86 xattr xcb xcomposite xinerama xml xmms xscreensaver xv xvid xvmc zlib" ABI_X86="32" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 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 sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" 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" KERNEL="linux" L10N="en de fr" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en de fr" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" SANE_BACKENDS="hp" USERLAND="GNU" VIDEO_CARDS="nvidia" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON jesnow@Merckx ~ $ equery list nvidia-drivers kde-plasma/* -f * Searching for nvidia-drivers ... [IP-] [ ] x11-drivers/nvidia-drivers-361.28:0/361 * Searching for kde-plasma/* ... [IP-] [ ] kde-plasma/breeze-5.8.3:5 [IP-] [ ] kde-plasma/breeze-gtk-5.8.3:5 [IP-] [ ] kde-plasma/kactivitymanagerd-5.8.3:5 [IP-] [ ] kde-plasma/kde-cli-tools-5.8.3:5 [IP-] [ ] kde-plasma/kde-gtk-config-5.8.3:5 [IP-] [ ] kde-plasma/kdecoration-5.8.3:5 [IP-] [ ] kde-plasma/kdeplasma-addons-5.8.3:5 [IP-] [ ] kde-plasma/kgamma-5.8.3:5 [IP-] [ ] kde-plasma/khotkeys-5.8.3:5 [IP-] [ ] kde-plasma/kinfocenter-5.8.3:5 [IP-] [ ] kde-plasma/kmenuedit-5.8.3:5 [IP-] [ ] kde-plasma/kscreen-5.8.3:5 [IP-] [ ] kde-plasma/kscreenlocker-5.8.3:5 [IP-] [ ] kde-plasma/ksshaskpass-5.8.3:5 [IP-] [ ] kde-plasma/ksysguard-5.8.3:5 [IP-] [ ] kde-plasma/kwallet-pam-5.8.3:5 [IP-] [ ] kde-plasma/kwayland-integration-5.8.3:5 [IP-] [ ] kde-plasma/kwin-5.8.3:5 [IP-] [ ] kde-plasma/kwrited-5.8.3:5 [IP-] [ ] kde-plasma/libkscreen-5.8.3:5/7 [IP-] [ ] kde-plasma/libksysguard-5.8.3:5 [IP-] [ ] kde-plasma/milou-5.8.3:5 [IP-] [ ] kde-plasma/oxygen-5.8.3:5 [IP-] [ ] kde-plasma/plasma-desktop-5.8.3:5 [IP-] [ ] kde-plasma/plasma-integration-5.8.3:5 [IP-] [ ] kde-plasma/plasma-meta-5.8.3:5 [IP-] [ ] kde-plasma/plasma-workspace-5.8.3:5 [IP-] [ ] kde-plasma/plasma-workspace-wallpapers-5.8.3:5 [IP-] [ ] kde-plasma/polkit-kde-agent-5.8.3:5 [IP-] [ ] kde-plasma/powerdevil-5.8.3:5 [IP-] [ ] kde-plasma/sddm-kcm-5.8.3:5 [IP-] [ ] kde-plasma/systemsettings-5.8.3:5 [IP-] [ ] kde-plasma/user-manager-5.8.3:5 jesnow@Merckx ~ $ jesnow@Merckx ~ $ equery list qtcore * Searching for qtcore ... [IP-] [ ] dev-qt/qtcore-4.8.6-r2:4 [IP-] [ ] dev-qt/qtcore-5.6.2:5/5.6
similar to this bug: https://bugs.gentoo.org/show_bug.cgi?id=569556 But not the same, because that bug only shows issues with a basically funcitoning setup. This is completely broke.
Deleting xorg.conf and letting it use xinerama works around the problem.
Please sync and update to plasma-workspace-5.8.3-r1, it contains several important backports related to multiscreen issues.
ping Unless this can be considered solved after your last comment?
*** This bug has been marked as a duplicate of bug 569556 ***
