On Tue, 22 Oct 2019 17:50:21 +0200 Böszörményi Zoltán <zboszor@xxxxx> wrote: > Hi, > > I have the below configuration for an Intel based POS system that, > while advertises 3 outputs (DP1, VGA1 and HDMI1 with xf86-video-intel), > only two are usable. DP1 for the built-in touchscreen and VGA1 for > the external VGA connector. > > I wanted to use an USB DisplayLink device as the 3rd output, with all > three output using its own Screen number, i.e. :0.0 :0.1 and :0.2. ... > The third observation is that while I am using this configuration below, > so the UDL device should be assigned to :0.2 (and active!), it is really > assigned to :0[.0] as an inactive output. See that there's no "*" indicator > set for any of the supported modes on DVI-I-1-1. > > How can I set up 3 different Screens correctly for 3 separate fullscreen > applications? > > I am using Xorg 1.20.4 patched with the "autobind GPUs to the screen" > patch from Dave Airlie that at least wakes up the UDL device and makes > it visible without extra magic with providers/sinks. Hi, for your specific use case, auto-bind is exactly what you do not want. So drop the patch or (since the patch is in upstream master already) use the option it adds to stop auto-binding. Thanks, pq
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