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| Hi, I am porting Tizen2.4 to Orangepi+, and now Tizen startup without GUI.
 and the X window system failed like this:
 
 X.Org X Server 1.16.0
 Release Date: 2014-07-16
 [   280.183] X Protocol Version 11, Revision 0
 [   280.183] Build Operating System: Linux 3.7.10-1.11-default armv7l Tizen Platform
 [   280.183] Current Operating System: Linux sun8i 3.4.39 #1 SMP PREEMPT Tue Mar 22 17:08:55 CST 2016 armv7l
 [   280.183] Kernel command line: console=ttyS0,115200 root=/dev/mmcblk0p7 init=/init loglevel=8 partitions=bootloader@mmcblk0p2:env@mmcblk0p5:boot@mmcblk0p6:rootfs@mmcblk0p7:system-data@mmcblk0p8:user@mmcblk0p9:csa@mmcblk0p10:csc@mmcblk0p11:UDISK@mmcblk0p1 security=none
 [   280.184] Build Date: 29 October 2015  05:16:04AM
 [   280.184]
 [   280.184] Current version of pixman: 0.28.2
 [   280.184]     Before reporting problems, check http://wiki.x.org
 to make sure that you have the latest version.
 [   280.184] Markers: (--) probed, (**) from config file, (==) default setting,
 (++) from command line, (!!) notice, (II) informational,
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
 [   280.184] (++) Log file: "/var/log/Xorg.0.log", Time: Thu Jan  1 09:06:19 1970
 [   280.185] (++) Using config file: "/etc/X11/xorg.conf"
 [   280.185] (++) Using config directory: "/etc/X11/xorg.conf.d"
 [   280.186] (==) No Layout section.  Using the first Screen section.
 [   280.186] (**) |-->Screen "Mali-Screen" (0)
 [   280.186] (**) |   |-->Monitor "Monitor0"
 [   280.186] (**) |   |-->Device "Mali-Fbdev"
 [   280.186] (**) Option "BlankTime" "0"
 [   280.187] (**) Option "StandbyTime" "0"
 [   280.187] (**) Option "SuspendTime" "0"
 [   280.187] (**) Option "OffTime" "0"
 [   280.187] (**) Option "IgnoreABI" "True"
 [   280.187] (**) Ignoring ABI Version
 [   280.187] (==) Automatically adding devices
 [   280.187] (==) Automatically enabling devices
 [   280.187] (==) Automatically adding GPU devices
 [   280.187] (==) FontPath set to:
 built-ins
 [   280.187] (==) ModulePath set to "/usr/lib/xorg/modules"
 [   280.187] (II) The server relies on udev to provide the list of input devices.
 If no devices become available, reconfigure udev or disable AutoAddDevices.
 [   280.187] (II) Loader magic: 0xb6febc08
 [   280.187] (II) Module ABI versions:
 [   280.187]     X.Org ANSI C Emulation: 0.4
 [   280.187]     X.Org Video Driver: 18.0
 [   280.187]     X.Org XInput driver : 21.0
 [   280.187]     X.Org Server Extension : 8.0
 [   280.188] (II) LoadModule: "extra"
 [   280.189] (WW) Warning, couldn't open module extra
 [   280.189] (II) UnloadModule: "extra"
 [   280.189] (II) Unloading extra
 [   280.189] (EE) Failed to load module "extra" (module does not exist, 0)
 [   280.189] (II) LoadModule: "xdbg"
 [   280.190] (II) Loading /usr/lib/xorg/modules/libxdbg.so
 [   280.191] (II) Module xdbg: vendor="X.Org Foundation"
 [   280.191]     compiled for 1.16.0, module version = 0.1.0
 [   280.191] (**) Option "dlog" "true"
 [   280.192] (**) Option "log_path" "/var/log/Xorg.0.log2"
 [   280.192] (**) Option "log_level" "7"
 [   280.192] [Jan 1 09:06:19:034] (II) [XDBG][xDbgModuleParseOptions] dlog: "on"
 [   280.193] (II) LoadModule: "mali"
 [   280.193] (II) Loading /usr/lib/xorg/modules/drivers/mali_drv.so
 [   280.197] (II) Module mali: vendor="X.Org Foundation"
 [   280.197]     compiled for 1.13.0, module version = 0.4.2
 [   280.197]     ABI class: X.Org Video Driver, version 13.0
 [   280.197] (WW) module ABI major version (13) doesn't match the server's version (18)
 [   280.197] (II) MALI: driver for Mali Framebuffer: mali
 [   280.197] (--) using VT number 2
 
 [   280.213] (WW) Falling back to old probe method for mali
 [   280.213] (II) MALI(0): using /dev/fb0.
 [   280.213] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
 [   280.213] (II) MALI(0): [MaliPreInit:1061]: Entering.
 [   280.213] (II) MALI(0): [MaliGetRec:194]: Entering.
 [   280.213] (II) MALI(0): [MaliHWInit:844]: Entering.
 [   280.213] (II) MALI(0): [MaliHWGetDepth:876]: Entering.
 [   280.213] (II) MALI(0): Creating default Display subsection in Screen section
 "Mali-Screen" for depth/fbbpp 24/32
 [   280.213] (**) MALI(0): Depth 24, (--) framebuffer bpp 32
 [   280.213] (==) MALI(0): RGB weight 888
 [   280.213] (==) MALI(0): Default visual is TrueColor
 [   280.214] (==) MALI(0): Using gamma correction (1.0, 1.0, 1.0)
 [   280.214] (II) MALI(0): [MaliHWGetVidmem:894]: Entering.
 [   280.214] (II) MALI(0): [MaliHWGetName:902]: Entering.
 [   280.214] (II) MALI(0): hardware:  (video memory: 7200kB).
 [   280.214] (**) MALI(0): Option "DRI2" "true"
 [   280.214] (**) MALI(0): Option "DRI2_PAGE_FLIP" "true"
 [   280.214] (**) MALI(0): Option "DRI2_WAIT_VSYNC" "false"
 [   280.214] (**) MALI(0): Option "UMP_CACHED" "false"
 [   280.214] (**) MALI(0): Option "UMP_LOCK" "true"
 [   280.214] (**) MALI(0): Option "XVHWOverlay" "true"
 [   280.214] (**) MALI(0): Option "MEASURE_FPS" "false"
 [   280.214] (**) MALI(0): DRI Fullscreen page flip enabled.
 [   280.214] (**) MALI(0): DRI Fullscreen page flip VSYNC disabled.
 [   280.214] (**) MALI(0): Use uncached UMP memory.
 [   280.214] (**) MALI(0): Use umplock across processes.
 [   280.224] (EE) MALI(0): [mali_drm_open_master:1030] Error: mali_drm_open_master Unable to open DRM: No such file or directory
 .
 [   280.224] (EE) MALI(0): [MaliPreInit:1163] Error: Failed to be master of DRM!.
 [   280.224] (II) UnloadModule: "mali"
 [   280.224] (EE) Screen(s) found, but none have a usable configuration.
 [   280.225] (EE)
 Fatal server error:
 [   280.225] (EE) no screens found(EE)
 [   280.225] (EE)
 Please consult the The X.Org Foundation support
 at http://wiki.x.org
 for help.
 [   280.225] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
 [   280.225] (EE)
 [   280.293] (EE) Server terminated with error (1). Closing log file.
 
 I use mali_drv.so as userspace video driver, and the problem is  there is no drm/mali_drm driver in kernel.
 andthere is poor support of DRM driver.
 Is anyone got the issue?   How to solve it?
 waiting for your help !!!!
 
 
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