Frédéric Bron composed on 2017-06-28 09:36 (UTC+0200): >> Have you already done a distro-sync . > just done, no change . >> or tried uninstalling sddm before trying >> startx? KDM still works . > not yet, should I just do this? > $ dnf remove ssdm* > $ dnf install kdm . I would do only the first, then reboot, then try startx before proceeding to install kdm. Given below, I don't believe sddm is your problem or that kdm would help. . >> Have you already tried uninstalling the nouveau driver? . > should I do this? > $ dnf remove nouveau* . That would be dnf remove xorg-x11-video-nouveau, but see below first. . >> If nothing else has helped as yet, provide hardware information: . > Here some first information: . > laptop DELL XPS15 9550 . > $ lspci -nnk|grep -A5 VGA > 0:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics > 530 [8086:191b] (rev 06) > Subsystem: Dell Device [1028:06e4] > Kernel driver in use: i915 > Kernel modules: i915 > 00:04.0 Signal processing controller [1180]: Intel Corporation Skylake > Processor Thermal Subsystem [8086:1903] (rev 07) > Subsystem: Dell Device [1028:06e4] . Your other thread indicated you have NVidia gfx, confirmed by looking at http://laptoping.com/specs/product/dell-xps-15-9550/ (Skylake) so it looks like you need to but have not utilized this doc: https://fedoraproject.org/wiki/Bumblebee That lspci -nnk | grep -A5 probably should have been -A12 or so. Try instead 'dnf install inxi; inxi -c0 -G'. Plasmashell seems might be thinking both displays are currently connected and it is trying to use the disconnected display, due to an inappropriate driver and/or laptop firmware configuration, or defective firmware in need of update. If it was here, first thing I would try is adding the following to ~/.config/kded5rc: [Module-kscreen] autoload=false just to see if it stops the black. It's a troubleshooting option, not something to keep permanently unless you plan to manually configure multiple displays through a startup xrandr script or xorg.conf*. Is linux-firmware installed? -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ _______________________________________________ kde mailing list -- kde@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kde-leave@xxxxxxxxxxxxxxxxxxxxxxx
