I'm on Linux Mint 17.2 Rafaela (i.e. Ubuntu 14.04) and all my QT-based applications have been ugly after an upgrade (text is scrambled, menu content disappear, cf. screenshot below).Environment$ lsb_release -aNo LSB modules are available.Distributor ID: LinuxMintDescription:    Linux Mint 17.2 RafaelaRelease:        17.2Codename:       rafaelaKDE: 4.14.2Dolphin: 4.14.2Error$ dolphinObject::connect: No such signal org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)QNativeImage: Unable to attach to shared memory segment.(dolphin:14220): Gdk-WARNING **: shmget failed: error 28 (No space left on device)X Error: BadDrawable (invalid Pixmap or Window parameter) 9  Major opcode: 62 (X_CopyArea)  Resource id:  0x0X Error: BadDrawable (invalid Pixmap or Window parameter) 9  Major opcode: 62 (X_CopyArea)  Resource id:  0x0X Error: BadDrawable (invalid Pixmap or Window parameter) 9  Major opcode: 62 (X_CopyArea)  Resource id:  0x0(dolphin:14220): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed(dolphin:14220): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failedI have similar issue with:smplayer, vlc, `digikamand other qt-based applicationsScreenshotRelatedHow to fix graphical issues with Skype, Gdk-WARNING?Upgraded to Ubuntu 15.10 Wily and get QNativeImage: Unable to attach shared memory segment
How to fix graphical issues with Qt applications? (dolphin:14635): Gdk-WARNING **: shmget failed: error 28 (No space left on device)
ubuntu;linux mint;kde;qt;dolphin
I tested the answer from Upgraded to Ubuntu 15.10 Wily and get QNativeImage: Unable to attach shared memory segment with the following command:QT_GRAPHICSSYSTEM=native dolphinand it works! The UI doesn't have the bug anymore. Permanent solutionRefer to the solution from above question, edit /etc/environment to add:QT_GRAPHICSSYSTEM=nativePossible values are native, raster and opengl.