Hi, Intro: USB display devices are dumb framebuffer devices that can drive a CRTC which is connected to the system through USB. These devices can be treated as just USB to VGA (DVI or HDMI) converters. They have some sort of compression (Devices from displaylink is one of them which uses RLE compression) implemented in the chip as the USB 2 bandwidth is 480MB/s. No 3D hardware acceleration so primary GPU is used for 3D acceleration. USB display devices just act as a monitor. After seeing the changes made in X server for offloading hardware acceleration for USB display devices (displaylink and others), I am curious to know about how Wayland takes care (if at all it does) of offloading hardware acceleration to primary GPU. X server uses primary GPU (intel or nvidia or ati) for 3D acceleration and just sends the scan out buffer to USB display device. As far as I went through the architecture of wayland I am not able to find where this fits in and how. Please provide some info on how this is (or will be) done. Thanks, Sannu