Viet, thank you for reporting this and helping make Ubuntu better. Could you please provide the missing information from https://help.ubuntu.com/community/DisplayLink#Reporting_bugs_when_using_the_latest_DisplayLink_driver ?
** Description changed: - I am using one screen on my laptop, one connected via hdmi directly to my laptop and one via iTec usb 3 dockingstation. I have Nvidia proprietary drivers installed but switched to the open ones, as suggested in the workaround on this site (https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223). I followed the workaround and uninstalled displaylink drivers, rebooted, reinstalled them and rebooted. This worked nicely, but I wanted to use a sceen in portrait mode instead of landscape, so I rotated it and after this my cursor flickered and was followed by an werid rectangle, in which the screen doesnt update. So I tried reinstalling again but without success. I also tried the command xrand --auto, but without success. The rectangle stayed. I tried to deactivate my smallest screen, which was the integrated laptop screen, but the problem persisted. If i uninstalled die display link driver, reboot so that I only use the directly connected screen and my laptop screen, then everything worked properly with and without rotation. Also after those driver un- and reinstalling the flickering would occur even without screen rotation (with display link driver installed). - After some searching I stumbled upon https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-384/+bug/1684240 which suggested logging out and then in again, which solved my problem. + I am using the built-in laptop screen, one external monitor connected + directly to my laptop via HDMI, and one external monitor connect via a + i-tec USB 3.0 Docking Station. - Now I can operate 3 monitors and one beeing rotated. + What happens is my mouse cursor flickers and is followed by an weird + rectangle, in which the screen doesn't update. + + Deactivating my laptop screen didn't change anything. + + This is not reproducible if I only use the laptop screen and HDMI + connected external monitor. + + WORKAROUND: Log out and in again. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: xorg 1:7.7+19ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 390.25 Wed Jan 24 20:02:43 PST 2018 GCC version: gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3) ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Feb 13 23:58:09 2018 DistUpgraded: Fresh install DistroCodename: artful DistroVariant: ubuntu DkmsStatus: bbswitch, 0.8, 4.13.0-31-generic, x86_64: installedError! Could not locate dkms.conf file. File: does not exist. bbswitch, 0.8, 4.13.0-32-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] 3rd Gen Core processor Graphics Controller [1025:071a] NVIDIA Corporation GK107M [GeForce GT 640M] [10de:0fd2] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] GK107M [GeForce GT 640M] [1025:071b] InstallationDate: Installed on 2017-12-06 (69 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018) MachineType: Acer Aspire M5-581TG ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed root=UUID=ac6372c5-a60f-47d5-8eab-91390b01a680 ro noplymouth SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/25/2013 dmi.bios.vendor: Acer dmi.bios.version: V2.11 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: MA51_HX dmi.board.vendor: Acer dmi.board.version: Type2 - Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V2.11 dmi.modalias: dmi:bvnAcer:bvrV2.11:bd02/25/2013:svnAcer:pnAspireM5-581TG:pvrV2.11:rvnAcer:rnMA51_HX:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.11: dmi.product.family: Type1Family dmi.product.name: Aspire M5-581TG dmi.product.version: V2.11 dmi.sys.vendor: Acer version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.83-1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.8-0ubuntu0~17.10.1 version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.8-0ubuntu0~17.10.1 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 xserver.bootTime: Tue Feb 13 23:14:54 2018 xserver.configfile: /etc/X11/xorg.conf xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.19.5-0ubuntu2 ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete ** Summary changed: - mouse started to Flicker with 3rd monitor + Mouse icon flickers when connected to i-tec USB 3.0 Docking Station -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1749313 Title: Mouse icon flickers when connected to i-tec USB 3.0 Docking Station To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1749313/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : email@example.com Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp