1A display - unfortunately only limited on Linux

I ordered this external USB LCD display to the move and in Hackerspaces not having to do without the multi-monitor comfort. The display is very well built, it is sufficient light, and thanks to the cover, which also serves as a monitor holder, it is well protected. All around a sophisticated product, which also is especially still quite favorable.

The review is over here for the mere mortals Windows or Mac user - strong buy recommendation.

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Unfortunately - and this is not what the product can even slightly - the setup under Linux is still half-baked. My request was to operate the display under the X.Org X server. For this I used Debian Wheezy with xserver-xorg 1: 7.7 +. 1 The chipset used in the display is a chipset from DisplayLink. The test program of libdlo recognized the display, showing the graphics demos errors.

In T420s Lenovo Thinkpad I use the integrated graphics card, which is controlled by the driver "Intel" (KMS + DRM). The display I could also trigger problems with its own Device section and manual specification of the framebuffer devices.

Now the fun was going on but only: If the "intel" driver to coincide with the "fbdev" driver active, the latter each driver contained in the configuration will be discharged. Say: Is "Intel" first defines "fbdev" is discharged and vice versa. The X server is silent about why that happens; on mailing lists and in IRC, I received no conclusive answer.

I can let the Intel graphics card running via fbdev, I tried this - goes without problems, as soon as you do not try to activate Xinerama. Since it without Xinerama 2 displays (0.0 and: 0.1) are, and the window manager is running on the former, you would of course use Xinerama. Unfortunately Xinerama can operate the composite root window only in the same color depth, and the display has only 16bpp - manual configuration of Modes not accepted the X-Server or just threw weird error messages.

If you * absolutely * want to get up and running this display on Linux, so there is the possibility of 2 X servers running with different configurations - and restart the window manager each 2x. Of course, you can then move any programs between monitors.

There are still tools like Xdmx who can combine X server and x2x, which transmits the input from an X session to the next. Unfortunately, no support x2x xinput, is thus useless in modern environments. There is also Synergy, which operates similarly to x2x.

Since I had arrived at the point "is not, so I have to either x2x, Xdmx or take Synergy", I chose: return. Otherwise it would have to become scarce with the 2 weeks return right and my nerves were after Configuration Foo quite down.

Conclusion: With attention to configuration files and other tools can display this well run under Linux - but a plug'n'play solution is not multi-GPU support for X11. While it is working on GPU hotplugging, but this will still take a while.