I've found the problem (or at least got some closer): It's the display port.
I'm using a monitor with 2560x1440 pixels, connected with display port. The computer has, although tiny, 2xhdmi and 1xdisplay port outputs. when (without nomodeset) lightdm starts Xorg, it works on the display port with full resolution, but as soon as the session starts, the screen remains black. When I use a HDMI Monitor together with the display port, only console and mouse pointer work, not even a visible login screen. but when I use a FullHD HDMI Monitor only, everything works. Now, when I use my 2560x1440 monitor over HDMI, the session works, but does have FullHD 1920x1080 only and thus is somewhat blurred. Furthermore, there's trouble with the mouse, it behaves crazy as soon as entering an thin area on the left side of the screen. So now I have a slightly blurred 1920x1080 desktop, a troubled mouse, and a display-port-monitor connected with an HDMI cable. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1767993 Title: Lubuntu: X11 freezing/low resolution on N3150 intel graphics Status in xorg-server package in Ubuntu: Incomplete Bug description: Hi, I just installed a fresh 18.04 on an ASRock beebox N3150 machine. The regular ubuntu desktop installer hanged after entering X11 mode, machine froze. I then used Lubuntu alternate installer with the console based installation, which worked without any problem. But after rebooting the system again hung after the graphical login prompt. I then changed the boot options in /etc/default/grub to give the kernel the options nosplash nomodeset and to leave the system in console mode (I had similar experiences with former ubuntu versions on that machine where X11 did not start when the mode had been set by console.) Now X11 works, but comes up in vesa mode (1024x768) only. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-core 2:1.19.6-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: LXDE Date: Mon Apr 30 12:25:09 2018 InstallationDate: Installed on 2018-04-30 (0 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1767993/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
