Hi! I'm facing some trouble with the X-Server on the Raspberry Pi 3 B+. No matter if I use a screen on the HDMI port or running the 7" touch screen, they remain black. After testing with sumo - where at least a splash screen was shown - I moved on to thud, as recommended by Andrei Gherzan to sort out the error "No screen found." The error is gone, but nothing is shown on the screen, not even a splash screen. Switching the branches of poky, meta-openembedded and meta-raspberrypi to latest master still shows the same issue.
In order to make sure not to waste time on some hardware issue, I gave Raspbian a try; both screens (Raspberry Pi Touchscreen & HDMI) work fine there. The entire build is pretty much default. The MACHINE is set to "raspberrypi3-64" and I added: ENABLE_UART = "1" RPI_USE_U_BOOT = "1" ... to get the debug interface working and to use U-Boot which at least shows some lines on the screen during the early boot steps. There are no custom recipes or meta layers yet. I have built core-image-x11 and core-image-sato, which both show the same behaviour. Xorg.0.log shows the following: [ 14.767] (II) LoadModule: "fbdev" [ 14.777] (WW) Warning, couldn't open module fbdev [ 14.777] (EE) Failed to load module "fbdev" (module does not exist, 0) [ 15.393] (II) modeset(0): EDID for output HDMI-1 [ 15.393] (II) modeset(0): EDID for output Composite-1 [ 15.393] (II) modeset(0): Printing probed modes for output Composite-1 [ 15.393] (II) modeset(0): Modeline "720x480"x31.3 13.50 720 734 798 858 480 483 486 502 interlace (15.7 kHz e) [ 15.393] (II) modeset(0): Output HDMI-1 disconnected [ 15.393] (II) modeset(0): Output Composite-1 disconnected [ 15.393] (WW) modeset(0): No outputs definitely connected, trying again... [ 15.393] (II) modeset(0): Output HDMI-1 disconnected [ 15.393] (II) modeset(0): Output Composite-1 connected [ 15.393] (II) modeset(0): Using sloppy heuristic for initial modes [ 15.393] (II) modeset(0): Output Composite-1 using initial mode 720x480 +0+0 [ 15.393] (==) modeset(0): Using gamma correction (1.0, 1.0, 1.0) [ 15.393] (==) modeset(0): DPI set to (96, 96) It complains to be unable to load the frame buffer driver (is it used on VC4?) and correctly detects the 7" screen with its 720x480. The X-Server seems to be up anyways: root@raspberrypi3-64:/var/log# ps|grep -i xorg 318 root 3700 S xinit /etc/X11/Xsession -- /usr/bin/Xorg :0 -br -pn 324 root 113m S< /usr/bin/Xorg :0 -br -pn As it's the first time I use Yocto to build a X11 image (only worked on headless systems until now) I think to miss something here. Does anyone have a hint on that? Any help is greatly appreciated! Thanks in advance, Mac
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