Comment 77 for bug 1278223

Same here. Ubuntu 16.04. ASUSTek Radeon HD 5750 Formula card and Sabrent DisplayLink, with Dual Dell S2440L monitors connected to the ASUSTek card and a ViewSonic VX922 monitor connected to the Sabrent device via native DVI. Heavy flickering on the mouse cursor with updating of the DisplayLink device. I have it set up so I can see the blinking light and notice that when it flickers the mouse cursor flickers on both the primary display and the secondary display, but not the one connected to the DisplayLink device. No flickering there at all. Another problem is that responsiveness seems slower on the other displays since connecting the DisplayLink device. I ran the Unity Support test and it shows that Unity is supported.

$ /usr/lib/nux/unity_support_test -p
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD JUNIPER (DRM 2.43.0, LLVM 3.8.0)
OpenGL version string: 3.0 Mesa 11.2.0

Not software rendered: yes
Not blacklisted: yes
GLX fbconfig: yes
GLX texture from pixmap: yes
GL npot or rect textures: yes
GL vertex program: yes
GL fragment program: yes
GL vertex buffer object: yes
GL framebuffer object: yes
GL version is 1.4+: yes

Unity 3D supported: yes

It is really seeming to bog down the performance of the system's other displays. It does not do that on Mac OS X or on Windows 7 or on Windows 10. Even typing has been slowed down noticeably.