1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking Benchmarking Platform
Phoromatic Test Orchestration

A Linux Driver For USB-Based Projectors

Free Software

Published on 07 April 2012 09:50 AM EDT
Written by Michael Larabel in Free Software
4 Comments

There's a new Linux graphics driver for allowing mini/pico/compact/handheld USB-interfacing display projectors to work under your favorite distribution.

Earlier this week an email hit the Phoronix news inbox from Antonio Ospite, who has been working on this new driver support along with a Reto Schneider. While some of these small projectors have a VGA/HDMI interface (in which case no special Linux graphics driver is needed under Linux), a growing number of them are USB-based where only a Microsoft Windows driver is available. (If you're not familiar with these types of mini/handheld projectors, see the Texas Instruments projector demo from X@FOSDEM.)

With originally targeting an Acer C110, which is based upon an Actions Micro AM7212P chipset, a new open-source driver was born. For the USB projectors there's a simple packet-based protocol for the display ASIC to exchange the data between the host and the projector. Besides the Acer C110, this is reportedly the same design as several other Acer C-Series projectors, Philis PicoPix projectors, the CEL-TEC MP-o1, and various off-brand USB projectors.

Writing this new USB projector driver required reverse-engineering the USB protocol by USB dumps and disassembling the Microsoft Windows driver blob. According to the developers, their implementation will work on any lubusb-1.0 host, even if it's Google's Android platform.

This new ACM7xxx series driver though isn't a DRM/KMS driver or an X.Org driver (nor a V4L2/fbdev driver either for that matter) but more in the form of a user-space library with a display daemon that can be called upon for displaying content. For more details on the implementation or how to use this open-source USB projector driver, read these two posts.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. Radeon Linux Benchmarks: Catalyst 15.3 Beta vs. Linux 4.0 + Mesa 10.6-devel
  2. Trying Out The Modern Linux Desktops With 4 Monitors + AMD/NVIDIA Graphics
  3. Turning A Basement Into A Big Linux Server Room
  4. NVIDIA's $1000+ GeForce GTX TITAN X Delivers Maximum Linux Performance
  5. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  6. The New Place Where Linux Code Is Constantly Being Benchmarked
Latest Linux News
  1. Kodi 15 Alpha 2 Released
  2. VirtualBox 5.0 Now In Beta, Adds PV To Windows/Linux Guests
  3. Go Language Improvements Coming For Ubuntu 15.04
  4. The Big SuperTuxKart Update Is Almost Ready
  5. Blender 2.74 Brings Many Improvements
  6. Qt Creator 3.4 Is Near
  7. Allwinner: "We Are Taking Initiative Actions Internally"
  8. It's Been Five Years Since The Phoronix Visit To Chernobyl
  9. Vulkan, The New Linux Server Room & BioShock Won Linux Users In March
  10. Debian 8.0 Jessie Gets A Release Date
Most Viewed News This Week
  1. Systemd Developers Did NOT Fork The Linux Kernel
  2. The Big Features Of The Linux 4.0 Kernel
  3. Improved OpenCL Support For Blender's Cycles Renderer
  4. Open-Source Driver Fans Will Love NVIDIA's New OpenGL Demo
  5. Ubuntu 15.04 Final Beta Released
  6. Nuclide: Facebook's New Unified IDE
  7. Debian 8.0 Jessie RC2 Installer Released
  8. The Most Common, Annoying Issue When Benchmarking Ubuntu On Many Systems