from journal log this looks wrong: Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: xf86EnableIOPort s: failed to set IOPL for I/O (Operation not permitted) Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(0): using drv /dev/dri/card0 Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (WW) Falling bac k to old probe method for fbdev Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) Loading sub module "fbdevhw" Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) LoadModule: "fbdevhw" Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
... Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (EE) open /dev/f b0: Permission denied Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : using drv /dev/dri/card1 Mai 14 12:12:04 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (WW) VGA arbiter : cannot open kernel arbiter, no multi-card support ... Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (EE) modeset(G0): glamor initialization failed but here it looks like monitor is correctly found (like in gnome-preferences) Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : EDID for output HDMI-1-2 Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : Manufacturer: HPN Model: 363a Serial#: 16843009 Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : Year: 2019 Week: 41 Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : EDID Version: 1.3 Mai 14 12:12:05 frank-G5-U20 /usr/lib/gdm3/gdm-x-session[1526]: (II) modeset(G0) : Digital Display Input -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1878421 Title: Using two GPUs with one monitor each, one is always black To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1878421/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
