Image location: https://autobuilder.yocto.io/pub/releases/yocto-2.7_M2.rc2/machines/beaglebone-yocto/

Git rev: master/be52da152a4d9f9e798844f592ec9ae7e051c658

Steps:
1. Download beaglebone core-image-sato-sdk wic image from the above link.
2. Deploy wic image to MircoSD card and boot up system.

The matchbox desktop can not start up successfully. Some warning messages on serial port:
(II) modeset(0): Initializing kms color map for depth 16, 6 bpc.
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported high keycode 372 for name <I372> ignored
>                   X11 cannot support keycodes above 255.
>                   This warning only shows for the first high keycode.
Errors from xkbcomp are not fatal to the X server
tilcdc 4830e000.lcdc: Invalid pitch: fb and crtc widths must be the same
D-BUS per-session daemon address is: unix:abstract=/tmp/dbus-QDAm4GZ7w7,guid=1d674124d30d28cb93b411925c64faff
Error: No calibratable devices found.
matchbox: Cant find a keycode for keysym 269025056
matchbox: ignoring key shortcut XF86Calendar=!$contacts

matchbox: Cant find a keycode for keysym 2809
matchbox: ignoring key shortcut telephone=!$dates

matchbox: Cant find a keycode for keysym 269025050
matchbox: ignoring key shortcut XF86Start=!matchbox-remote -desktop

dbus-daemon[660]: Activating service name='org.a11y.atspi.Registry' requested by ':1.0' (uid=0 pid=638 comm="connman-applet ")
[settings daemon] Forking. run with -n to prevent fork
dbus-daemon[660]: Successfully activated service 'org.a11y.atspi.Registry'
SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
matchbox-wm: X error warning (0xc00002): BadWindow (invalid Window parameter) (opcode: 12)
tilcdc 4830e000.lcdc: tilcdc_plane_atomic_check: Size must match mode (0x0 == 1280x1024)


This is a regression issue. It works on 2.7 M2 RC1.