With nvidia proprietary driver no problem, but with nouveau, some gnome apps display black color items. See attachments. It happen on tested kernels "linux-image-4.15.0-22-generic" and "linux-image-4.15.0-23-generic" on ubuntu bionic-proposed.
Created attachment 139766 [details] nouveau-gnome-issue-synaptic.png
Created attachment 139767 [details] nouveau-gnome-issue-software-updater.png
The black patterns appear when moving the mouse over the items of the GUI.
Probably related: https://gitlab.gnome.org/GNOME/nautilus/issues/426
What GPU is this? Check your xorg log. Are you using nouveau or modeset? If the latter, please use nouveau.
If I open the gnome software on Plasma desktop same issue for those apps. KDE apps apparently are not affected.
(In reply to Ilia Mirkin from comment #5) > What GPU is this? > > Check your xorg log. Are you using nouveau or modeset? If the latter, please > use nouveau. Do you mean this: [ 18.750] (==) Matched modesetting as autoconfigured driver 2 [ 18.750] (II) LoadModule: "modesetting" [ 18.750] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so [ 18.750] (II) Module modesetting: vendor="X.Org Foundation" [ 18.750] (==) Matched modesetting as autoconfigured driver 2 [ 18.751] (II) LoadModule: "modesetting" [ 18.751] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so [ 18.751] (II) Module modesetting: vendor="X.Org Foundation" [ 18.751] (II) UnloadModule: "modesetting" [ 18.751] (II) Unloading modesetting [ 18.751] (II) Failed to load module "modesetting" (already loaded, 0) [ 18.751] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 18.751] (II) modeset(0): using drv /dev/dri/card0 [ 18.751] (II) modeset(0): Creating default Display subsection in Screen section lspci: 01:00.0 VGA compatible controller: NVIDIA Corporation GP104M [GeForce GTX 1080 Mobile] (rev a1) Subsystem: Micro-Star International Co., Ltd. [MSI] GP104M [GeForce GTX 1080 Mobile] Kernel driver in use: nouveau Kernel modules: nvidiafb, nouveau
Created attachment 139796 [details] Xorg.0.log
How do I switch from modeset to nouveau?
[ 18.750] (II) LoadModule: "nouveau" [ 18.750] (WW) Warning, couldn't open module nouveau [ 18.750] (II) UnloadModule: "nouveau" [ 18.750] (II) Unloading nouveau [ 18.750] (EE) Failed to load module "nouveau" (module does not exist, 0) You need to install xf86-video-nouveau. If you're unsure of how to do this on your distro, you need to find distro-specific support to help with that.
Fixed installing xserver-xorg-video-nouveau on ubuntu
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