I have tried using a raspberry pi as a client with icedtea and it worked but I found it unusably slow. I haven’t tried it overclocked. I have also tried it on a beaglebone black and it is almost usable as a client. Both worked out of the box with a Siemens touchscreen I had. It uses a generic ELO driver. They may be slow but for $35 and $45 they are impressive. It was funny to have a $35 computer attached to a $1200 industrial monitor.