运行directfb 的 demo出错

[ubuntu]

# df_window
(*) Direct/Thread: Started 'SigHandler' (12001) [CRITICAL - OTHER/0] <8388608>...

   ~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.7.7 |~~~~~~~~~~~~~~~~~~~~~~~~~~
        (c) 2012-2015  DirectFB integrated media GmbH
        (c) 2001-2015  The world wide DirectFB Open Source Community
        (c) 2000-2004  Convergence (integrated media) GmbH
      ----------------------------------------------------------------

(*) DirectFB/Core: Single Application Core. (2023-03-28 12:14)
(*) Direct/Memcpy: Using libc memcpy()
(*) Direct/Thread: Started 'Fusion Dispatch' (12002) [MESSAGING - OTHER/0] <8388608>...
(!) DirectFB/core/vt: Couldn't open neither `/dev/tty0' nor `/dev/vc/0'!
    --> No such file or directory
(!) DirectFB/Core: Could not initialize 'system_core' core!
    --> A general initialization error occured
 (!!!)  *** UNIMPLEMENTED [fusion_dispatch] *** [fusion.c:3937]

[whycan]

@ubuntu

https://blog.51cto.com/u_15899439/5909239

根据提示信息，directfb貌似依赖/dev/tty0或者/dev/vc/*设备节点，根据提示，打开/dev/vt/*使能配置

CONFIG_VT选项将会打开内核对Virtual Terminal的支持，CONFIG_VT 打开后，内核才会支持带显示和键盘的终端设备，由于这类终端设备上通常可以打开多个virtual termial,类似于gnome console，所以叫做virtual terminal,配置上讲：