On Friday, January 19, 2018 at 10:36:14 AM UTC-7, RobertCNelson wrote: > > On Fri, Jan 19, 2018 at 11:20 AM, Hartley Sweeten <[email protected] > <javascript:>> wrote: > > Hello all, > > > > Does anyone know what the minimum install is needed to get a Qt4 program > to > > run on a BeagleBone Black? > > > > I'm trying to get a kiosk type program running with a 7" touchscreen. I > have > > tried various LCD capes and have narrowed it down to a Newhaven > > NHD-7.0CTP-CAPE. That screen has a capacitive touch instead of a > resistive > > touch and seems to work a lot better. The capacitive touch doesn't have > the > > calibration issues I saw with the resistive touch. > > > > Starting with this image: > > > > https://rcn-ee.net/rootfs/bb.org/testing/2018-01-14/stretch-console/ > > > > I have verified that the LCD and touch work using the ts_test program > from > > the libts-bin package (thank Robert for adding the libts packages!). > > > > I have also tested the LCD and touch with SDL1.2 (again thanks to Robert > for > > adding libsdl1.2* with directfb and libts support!). > > > > Pygame also works fine with the updated libsdl1.2*. > > > > Great! I know the screen "works". Now hoe do I get a Qt4 program to > work? I > > have tried a simple program but when I run it I get: > > > > $ ./test > > test: cannot connect to X server > > > > The '-qws' switch also doesn't work. I think this is due to the Qt4 > library > > not being compiled with the --embedded option (and possible other..). > > > > I have also tried to use xvfb (Virtual Framebuffer 'fake' X server). But > it > > either doesn't work or I'm doing something wrong. When I try to run the > test > > app I don't get any error messages but nothing happens. > > > > I don't want to use a full X11 install due to the bloat. I just need a > > working X server so that the Qt4 program will run. I could try building > Qt4 > > with the necessary options but last time I tried it didn't work. I was > able > > to get the program to run on the LCD but the touchscreen didn't work. Of > > course that was with a resistive not the capacitive touchscreen. The > other > > problem was it takes something like 40 hours to build Qt4. Agh... > > So QT5 ( i know it's not QT4 ;) ) > > Has a direcfb that is currently disabled: > > QPA backends: > DirectFB ............. no > EGLFS ................ yes > EGLFS i.MX6 ........ no > EGLFS i.MX6 Wayland. no > EGLFS EGLDevice .... yes > EGLFS GBM .......... yes > EGLFS Mali ......... no > EGLFS Raspberry Pi . no > EGLFS X11 .......... yes > > It also has a tslib option: > > tslib .................. no > > > https://buildd.debian.org/status/fetch.php?pkg=qtbase-opensource-src&arch=armhf&ver=5.7.1%2Bdfsg-3&stamp=1484191682&raw=0 > > > we could try rebuilding 'qtbase-opensource-src' and see what happens..
Qt4 or Qt5 will work for me. I wasn't aware that Qt5 could work directly with the framebuffer. I thought QWS was needed in order to run without X. According to the following site, the QWS implementation was removed in Qt5: http://doc.qt.io/qt-5/embedded-linux.html Qt4 specifically states that it can work without X: http://doc.qt.io/archives/qt-4.8/qt-embedded-linux.html I'm willing to try either one it your willing to rebuild it :-) Thanks, Hartley -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/42797957-8b04-4c02-a2e0-ccfd2b90ec74%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
