@duanzhh 找到原因了，mad，智障自己，流控打开又给自己在system_config.fex里面关闭了

@masterlu 我也遇到了，有解决办法吗

平台：r818
系统：tina- linux4.9
rootfs：ubuntu18 + xfce4 + slim

问题描述：linux设备树，更改显示格式：

fb0_format               = <0>;  

烧录固件，启动登录系统：桌面背景黑色，弹出的字体发虚；但是xfce4-panel的字体是正常的，打开浏览器的字体和背景也是正常的；

我有尝试改变xfce4外观，但好像只是改变主题的，这种不清楚啥原因的。有大佬遇见过这种现象吗？

@yuzukitsuru 感谢大佬，我想一下别的方法

@yuzukitsuru 感谢大佬指点，我同步开启的font选项，启动时还是会报错，换成模块加载的形式，进行终端加载就不会报错。应该就是大佬说的加载顺序问题。那如果基于现状，想把log信息放在lcd显示，有什么其他方法推荐的

有大佬遇见过类似现象吗

平台：r818
系统：tina

问题：想把log信息放在lcd上显示
对策：更改内核的menuconfig
现象：平台启动崩溃
请问有大佬遇到过吗，有没有什么思路提供的

Location:
     -> Device Drivers 
          -> Graphics support 
            -> Console display driver support
                <*> Framebuffer Console support 
                [*]   Map the console to the primary display device

更改如图所示：

[    1.625020] [DISP]disp_module_init
[    1.626289] disp soc@03000000:disp1@1: unable to map de registers
[    1.628954] disp: probe of soc@03000000:disp1@1 failed with error -22
[    1.636578] [DISP] disp_init,line:2229:
[    1.638913] smooth display screen:0 type:1 mode:4
[    1.676939] display_fb_request,fb_id:0
[    1.680676] [DISP] Fb_copy_boot_fb,line:1630:
[    1.680716] no boot_fb0
[    1.684165] [DISP] lcd_clk_config,line:662:
[    1.684166] disp 0, clk: pll(432000000),clk(432000000),dclk(72000000) dsi_rate(72000000)
[    1.684166]      clk real:pll(432000000),clk(432000000),dclk(108000000) dsi_rate(150000000)
[    1.717578] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717588] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717597] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717606] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717615] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717625] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717634] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717643] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717653] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    1.717663] sun50iw10p1-pinctrl pio: expect_func as:dsi4lane, but muxsel(4) is func:dsi0
[    2.099818] =============================linux-test2_panel_init=========================
[    3.175848] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[    3.175853] [0000000000000000] user address but active_mm is swapper
[    3.175858] Internal error: Oops: 86000005 [#1] PREEMPT SMP
[    3.175863] Modules linked in:
[    3.175870] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.9.191 #418
[    3.175872] Hardware name: sun50iw10 (DT)
[    3.175876] task: ffffffc07b148080 task.stack: ffffffc07b13c000
[    3.175881] PC is at 0x0
[    3.175892] LR is at bit_putcs+0x220/0x390
[    3.175895] pc : [<0000000000000000>] lr : [<ffffff80082d24dc>] pstate: 60000045
[    3.175896] sp : ffffffc07b13f520
[    3.175902] x29: ffffffc07b13f520 x28: 0000000000000064 
[    3.175907] x27: 00000000000000ff x26: ffffffc0794b40c8 
[    3.175912] x25: ffffffc0799fa2e4 x24: ffffffc07b020680 
[    3.175916] x23: 0000000000000001 x22: ffffffc0794b4000 
[    3.175921] x21: 0000000000000000 x20: ffffffc079446680 
[    3.175926] x19: 0000000000000000 x18: 0000000000000000 
[    3.175930] x17: 0000000000000000 x16: 0000000000000000 
[    3.175935] x15: 0000000000000002 x14: 0000000000000000 
[    3.175939] x13: 0000000000000000 x12: 000000000000000b 
[    3.175944] x11: 0000000000000018 x10: ffffff8008afd000 
[    3.175949] x9 : 0000000000000000 x8 : 0000000000000000 
[    3.175953] x7 : 0000000000000000 x6 : 0000000000000007 
[    3.175958] x5 : 0000000000000000 x4 : 0000000000000640 
[    3.175962] x3 : 0000000000000000 x2 : 0000000000000000 
[    3.175967] x1 : ffffffc07b13f5e0 x0 : ffffffc079446680 
[    3.175970] 
[    3.175970] SP: 0xffffffc07b13f4a0:
[    3.175983] f4a0  794b4000 ffffffc0 00000001 00000000 7b020680 ffffffc0 799fa2e4 ffffffc0
[    3.175995] f4c0  794b40c8 ffffffc0 000000ff 00000000 00000064 00000000 7b13f520 ffffffc0
[    3.176007] f4e0  082d24dc ffffff80 7b13f520 ffffffc0 00000000 00000000 60000045 00000000
[    3.176019] f500  00000000 00000000 79446680 ffffffc0 ffffffff ffffffff 794b4000 ffffffc0
[    3.176031] f520  7b13f630 ffffffc0 082ccfbc ffffff80 7b020680 ffffffc0 00000000 00000000
[    3.176043] f540  79446680 ffffffc0 794b4000 ffffffc0 00000064 00000000 00000000 00000000
[    3.176055] f560  082d22bc ffffff80 00000007 00000000 00000000 00000000 00000000 00000000
[    3.176067] f580  7b13f5d0 ffffffc0 00000000 00000000 7b020680 ffffffff 79446680 ffffffc0
[    3.176070] 
[    3.176070] X0: 0xffffffc079446600:
[    3.176082] 6600  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176094] 6620  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176106] 6640  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176118] 6660  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176130] 6680  00000001 00000000 00000000 00000000 00000000 00010001 79446698 ffffffc0
[    3.176142] 66a0  79446698 ffffffc0 7b148080 ffffffc0 79446690 ffffffc0 00000001 00000000
[    3.176155] 66c0  794466c0 ffffffc0 794466c0 ffffffc0 00000000 00000000 794466b8 ffffffc0
[    3.176166] 66e0  00000320 00000500 00000320 00000a00 00000000 00000000 00000010 00000000
[    3.176169] 
[    3.176169] X1: 0xffffffc07b13f560:
[    3.176181] f560  082d22bc ffffff80 00000007 00000000 00000000 00000000 00000000 00000000
[    3.176193] f580  7b13f5d0 ffffffc0 00000000 00000000 7b020680 ffffffff 79446680 ffffffc0
[    3.176205] f5a0  794b40c8 ffffffc0 79a79c80 00000000 00000000 00000000 00000001 00000200
[    3.176217] f5c0  00000064 00000010 00000001 00000064 00000064 ffffffc0 082cf534 ffffff80
[    3.176229] f5e0  00000000 00000000 00000320 00000010 00000007 00000000 082d5201 ffffff80
[    3.176241] f600  799fa280 ffffffc0 082ccf98 ffffff80 7b020680 ffffffc0 00000000 00000000
[    3.176253] f620  79446680 ffffffc0 794b4000 ffffffc0 7b13f680 ffffffc0 0833dfc8 ffffff80
[    3.176265] f640  794b40c8 ffffffc0 794b4000 ffffffc0 7b020680 ffffffc0 00000064 00000000
[    3.176275] 
[    3.176275] X20: 0xffffffc079446600:
[    3.176288] 6600  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176300] 6620  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176312] 6640  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176324] 6660  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176336] 6680  00000001 00000000 00000000 00000000 00000000 00010001 79446698 ffffffc0
[    3.176348] 66a0  79446698 ffffffc0 7b148080 ffffffc0 79446690 ffffffc0 00000001 00000000
[    3.176360] 66c0  794466c0 ffffffc0 794466c0 ffffffc0 00000000 00000000 794466b8 ffffffc0
[    3.176372] 66e0  00000320 00000500 00000320 00000a00 00000000 00000000 00000010 00000000
[    3.176375] 
[    3.176375] X22: 0xffffffc0794b3f80:
[    3.176387] 3f80  5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a
[    3.176400] 3fa0  5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a
[    3.176412] 3fc0  5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a
[    3.176424] 3fe0  5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a 5a5a5a5a
[    3.176437] 4000  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176449] 4020  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176461] 4040  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176473] 4060  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176476] 
[    3.176476] X24: 0xffffffc07b020600:
[    3.176489] 0600  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176501] 0620  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176513] 0640  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176525] 0660  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc
[    3.176537] 0680  7b0206d8 ffffffc0 ffffffe0 0000000f 7b020690 ffffffc0 7b020690 ffffffc0
[    3.176549] 06a0  083334c8 ffffff80 00000001 00000000 7b0206b0 ffffffc0 7b0206b0 ffffffc0
[    3.176562] 06c0  00000000 00000000 7b0206a8 ffffffc0 00000000 00000000 00000000 00000000
[    3.176573] 06e0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176576] 
[    3.176576] X25: 0xffffffc0799fa264:
[    3.176588] a264  cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc cccccccc 00000000
[    3.176600] a284  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176611] a2a4  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176623] a2c4  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176635] a2e4  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176646] a304  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176658] a324  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176670] a344  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.176672] 
[    3.176672] X26: 0xffffffc0794b4048:
[    3.176685] 4048  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176697] 4068  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176709] 4088  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176722] 40a8  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176734] 40c8  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176746] 40e8  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176758] 4108  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176770] 4128  07200720 07200720 07200720 07200720 07200720 07200720 07200720 07200720
[    3.176774] 
[    3.176774] X29: 0xffffffc07b13f4a0:
[    3.176786] f4a0  794b4000 ffffffc0 00000001 00000000 7b020680 ffffffc0 799fa2e4 ffffffc0
[    3.176798] f4c0  794b40c8 ffffffc0 000000ff 00000000 00000064 00000000 7b13f520 ffffffc0
[    3.176810] f4e0  082d24dc ffffff80 7b13f520 ffffffc0 00000000 00000000 60000045 00000000
[    3.176822] f500  00000000 00000000 79446680 ffffffc0 ffffffff ffffffff 794b4000 ffffffc0
[    3.176834] f520  7b13f630 ffffffc0 082ccfbc ffffff80 7b020680 ffffffc0 00000000 00000000
[    3.176846] f540  79446680 ffffffc0 794b4000 ffffffc0 00000064 00000000 00000000 00000000
[    3.176858] f560  082d22bc ffffff80 00000007 00000000 00000000 00000000 00000000 00000000
[    3.176870] f580  7b13f5d0 ffffffc0 00000000 00000000 7b020680 ffffffff 79446680 ffffffc0
[    3.176871] 
[    3.176875] Process swapper/0 (pid: 1, stack limit = 0xffffffc07b13c000)
[    3.176879] Stack: (0xffffffc07b13f520 to 0xffffffc07b140000)
[    3.176884] f520: ffffffc07b13f630 ffffff80082ccfbc ffffffc07b020680 0000000000000000
[    3.176889] f540: ffffffc079446680 ffffffc0794b4000 0000000000000064 0000000000000000
[    3.176894] f560: ffffff80082d22bc 0000000000000007 0000000000000000 0000000000000000
[    3.176899] f580: ffffffc07b13f5d0 0000000000000000 ffffffff7b020680 ffffffc079446680
[    3.176904] f5a0: ffffffc0794b40c8 0000000079a79c80 0000000000000000 0000020000000001
[    3.176909] f5c0: 0000001000000064 0000006400000001 ffffffc000000064 ffffff80082cf534
[    3.176914] f5e0: 0000000000000000 0000001000000320 0000000000000007 ffffff80082d5201
[    3.176919] f600: ffffffc0799fa280 ffffff80082ccf98 ffffffc07b020680 0000000000000000
[    3.176924] f620: ffffffc079446680 ffffffc0794b4000 ffffffc07b13f680 ffffff800833dfc8
[    3.176929] f640: ffffffc0794b40c8 ffffffc0794b4000 ffffffc07b020680 0000000000000064
[    3.176934] f660: 0000000000000000 0000000000001edc ffffffc0794b40c8 0000000000000720
[    3.176939] f680: ffffffc07b13f6e0 ffffff800833f75c ffffffc07b020680 0000000000000001
[    3.176944] f6a0: 0000000000000001 0000000000000000 ffffff8008af0000 00000000000000c8
[    3.176949] f6c0: 0000000000000050 ffffff800833f6f8 ffffffc07b020680 0000000000000000
[    3.176954] f6e0: ffffffc07b13f720 ffffff80082cda08 ffffffc07b020680 ffffffc0794b7e80
[    3.176959] f700: 0000000000000064 0000000000000000 ffffff8008af0000 ffffff80082cd9fc
[    3.176964] f720: ffffffc07b13f790 ffffff80082cfbfc ffffffc079446680 ffffff8008af0000
[    3.176969] f740: ffffffc079a79c80 ffffff8008af0520 ffffff8008af0000 0000000000000064
[    3.176974] f760: 0000000000000050 ffffffc07b020680 0000000000000001 ffffffc07b020680
[    3.176979] f780: ffffffc07b13f790 ffffff8000000050 ffffffc07b13f810 ffffff800833ea78
[    3.176984] f7a0: ffffffc07b020680 ffffff8008afd000 0000000000000000 0000000000000000
[    3.176989] f7c0: 0000000000000000 ffffff8008749b30 0000000000000000 000000000000003e
[    3.176994] f7e0: 0000000000000000 ffffffc07b020680 ffffffc07b13f810 ffffffc07b0207e8
[    3.176999] f800: 0000005000000000 0000000000000064 ffffffc07b13f840 ffffff80083400f4
[    3.177003] f820: ffffff8008afd000 0000000000000000 0000000000000001 0000000000000000
[    3.177008] f840: ffffffc07b13f8d0 ffffff80083404b8 0000000000000000 ffffff8008afe130
[    3.177013] f860: ffffff8008749b30 0000000000000000 0000000000000000 000000000000003e
[    3.177018] f880: 0000000000000001 ffffff8008afe130 0000000000000001 0000000000000004
[    3.177023] f8a0: ffffffc07b13f8d0 0000000000000028 ffffff8008afd718 ffffff8008afd508
[    3.177028] f8c0: 0000000100000001 ffffff8008858a06 ffffffc07b13f920 ffffff80082cdc98
[    3.177033] f8e0: ffffff8008af0000 ffffff80089bf000 0000000000000005 0000000000000000
[    3.177038] f900: 0000000000000000 ffffff80089bf000 ffffffc079446690 ffffffc079446918
[    3.177043] f920: ffffffc07b13f940 ffffff80082d08dc ffffff8008af0450 ffffff80089bf930
[    3.177048] f940: ffffffc07b13f9a0 ffffff80080b3240 00000000ffffffff 0000000000000000
[    3.177053] f960: 0000000000000005 ffffffc07b13fa90 0000000000000000 ffffff80089bf000
[    3.177058] f980: ffffffc079446690 ffffffc079446918 0000000000000001 0000000000000004
[    3.177063] f9a0: ffffffc07b13f9e0 ffffff80080b3570 ffffff80089bf9f0 0000000000000005
[    3.177067] f9c0: ffffffc07b13fa90 00000000ffffffff 0000000000000000 0000000000000004
[    3.177072] f9e0: ffffffc07b13fa20 ffffff80080b35b0 ffffffc079446680 ffffff8008af24a8
[    3.177077] fa00: 0000000000000000 ffffff800899d5b8 0000000000000000 ffffff80080d6a04
[    3.177082] fa20: ffffffc07b13fa30 ffffff80082d29ac ffffffc07b13fa40 ffffff80082d4a20
[    3.177087] fa40: ffffffc07b13fae0 ffffff80082e24c8 ffffff8008af5388 0000000000000000
[    3.177093] fa60: ffffff800899c000 ffffff8008af24c0 ffffff8008af24c0 ffffff8008af24e0
[    3.177097] fa80: 0000000000000002 ffffff800885a15a ffffffc079446680 0000000000000000
[    3.177102] faa0: 0000000000000000 000003200000003c 0000364000000500 0000003400000030
[    3.177107] fac0: 000000100000000f 0000000600000008 0000000000000000 0000000000000020
[    3.177112] fae0: ffffffc07b13fb80 ffffff80082dc97c ffffff8008af2720 ffffff8008af24b8
[    3.177117] fb00: 0000000000000002 ffffffc079c32480 ffffffc079c32490 ffffff8008af3000
[    3.177122] fb20: ffffff80089bf000 0000000000000002 ffffffc079c32490 ffffff8000000000
[    3.177127] fb40: 0000032000000002 0000032000000500 ffffffc000000500 727020636e797376
[    3.177132] fb60: ffffff003120636f ffffff8008af2000 ffffffc07b13fb80 00000000000409bf
[    3.177138] fb80: ffffffc07b13fc00 ffffff800838b874 00000000fffffffe ffffffc079c32490
[    3.177142] fba0: ffffff80089bfbf0 ffffff80089bfbf0 0000000000000000 0000000000000000
[    3.177147] fbc0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177152] fbe0: 0000000000000000 0000000000000000 ffffffc07b13fc00 000000000838b858
[    3.177157] fc00: ffffffc07b13fc30 ffffff8008389f44 ffffffc079c32490 ffffff8008aff000
[    3.177162] fc20: 0000000000000000 ffffff80089bfbf0 ffffffc07b13fc70 ffffff800838a070
[    3.177167] fc40: ffffffc079c32490 ffffffc079c324f0 ffffff80089bfbf0 ffffff8008a8f210
[    3.177172] fc60: 0000000000000000 ffffff8008a8f210 ffffffc07b13fca0 ffffff80083884c8
[    3.177177] fc80: 0000000000000000 ffffff80089bfbf0 ffffff8008389ffc ffffff8008388494
[    3.177183] fca0: ffffffc07b13fce0 ffffff800838996c ffffff80089bfbf0 ffffffc079a32180
[    3.177188] fcc0: ffffff8008a8e000 ffffff80086f41cc ffffffc07b258128 ffffffc079c2dee8
[    3.177193] fce0: ffffffc07b13fcf0 ffffff80083895e8 ffffffc07b13fd30 ffffff800838a93c
[    3.177198] fd00: ffffff80089bfbf0 ffffff8008858f48 ffffff800874afe8 ffffff800874afa8
[    3.177203] fd20: ffffff8008937594 ffffffc07b13fd60 ffffffc07b13fd50 ffffff800838b7cc
[    3.177209] fd40: ffffff8008af35b8 ffffff8008858f48 ffffffc07b13fd60 ffffff80089376a8
[    3.177214] fd60: ffffffc07b13fd90 ffffff80080834d0 ffffffc07b148080 ffffff8008957150
[    3.177219] fd80: 0000000000000000 ffffff800899c000 ffffffc07b13fe20 ffffff8008920ce0
[    3.177224] fda0: ffffff800894d7d8 ffffff8008957150 0000000000000007 0000000000000008
[    3.177228] fdc0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177233] fde0: 0000000000000000 0000000000000000 ffffffc07b13fe00 ffffff800883bc73
[    3.177238] fe00: ffffff800873c8f0 0000000000000000 0000000700000007 00000000000409bf
[    3.177243] fe20: ffffffc07b13fe70 ffffff8008920e5c 0000000000000007 ffffff8008ad1048
[    3.177248] fe40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177253] fe60: 0000000000000000 ffffff8008ad1048 ffffffc07b13fea0 ffffff80086f591c
[    3.177258] fe80: ffffff80086f590c 0000000000000000 0000000000000000 ffffff80080b93d0
[    3.177263] fea0: 0000000000000000 ffffff8008083180 ffffff80086f590c 0000000000000000
[    3.177267] fec0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177272] fee0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177277] ff00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177281] ff20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177286] ff40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177290] ff60: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177295] ff80: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177299] ffa0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177304] ffc0: 0000000000000000 0000000000000005 0000000000000000 0000000000000000
[    3.177309] ffe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    3.177310] Call trace:
[    3.177315] Exception stack(0xffffffc07b13f350 to 0xffffffc07b13f480)
[    3.177318] f340:                                   0000000000000000 0000007fffffffff
[    3.177323] f360: ffffffc07b13f520 0000000000000000 ffffff800808a0f8 ffffffc07b13f3d8
[    3.177328] f380: ffffffc079446680 ffffff80080e9664 ffffffc07b13f3c0 ffffff800808a160
[    3.177333] f3a0: ffffff80086fba40 0000000000000001 ffffffc07b13f500 0000000000000000
[    3.177338] f3c0: ffffffc07b13f400 ffffff80080b732c ffffffc07b13f470 ffffff8000000000
[    3.177343] f3e0: ffffff80080cece0 ffffffc07b13f440 ffffffc079446680 ffffffc07b13f5e0
[    3.177348] f400: 0000000000000000 0000000000000000 0000000000000640 0000000000000000
[    3.177353] f420: 0000000000000007 0000000000000000 0000000000000000 0000000000000000
[    3.177358] f440: ffffff8008afd000 0000000000000018 000000000000000b 0000000000000000
[    3.177362] f460: 0000000000000000 0000000000000002 0000000000000000 0000000000000000
[    3.177365] [<          (null)>]           (null)
[    3.177372] [<ffffff80082ccfbc>] fbcon_putcs+0xfc/0x114
[    3.177381] [<ffffff800833dfc8>] do_update_region+0x128/0x164
[    3.177387] [<ffffff800833f75c>] redraw_screen+0x168/0x1bc
[    3.177392] [<ffffff80082cda08>] fbcon_prepare_logo+0x13c/0x360
[    3.177398] [<ffffff80082cfbfc>] fbcon_init+0x2f8/0x40c
[    3.177403] [<ffffff800833ea78>] visual_init+0xbc/0x10c
[    3.177410] [<ffffff80083400f4>] do_bind_con_driver+0x26c/0x2d0
[    3.177416] [<ffffff80083404b8>] do_take_over_console+0x16c/0x1b8
[    3.177421] [<ffffff80082cdc98>] do_fbcon_takeover+0x6c/0xd4
[    3.177427] [<ffffff80082d08dc>] fbcon_event_notify+0x3e8/0x7c8
[    3.177434] [<ffffff80080b3240>] notifier_call_chain+0x64/0x84
[    3.177440] [<ffffff80080b3570>] __blocking_notifier_call_chain+0x4c/0x78
[    3.177445] [<ffffff80080b35b0>] blocking_notifier_call_chain+0x14/0x1c
[    3.177451] [<ffffff80082d29ac>] fb_notifier_call_chain+0x1c/0x24
[    3.177457] [<ffffff80082d4a20>] register_framebuffer+0xa4/0x290
[    3.177463] [<ffffff80082e24c8>] fb_init+0x374/0x6ac
[    3.177469] [<ffffff80082dc97c>] disp_probe+0x80c/0x10e4
[    3.177476] [<ffffff800838b874>] platform_drv_probe+0x54/0xa8
[    3.177482] [<ffffff8008389f44>] driver_probe_device+0x1b4/0x26c
[    3.177487] [<ffffff800838a070>] __driver_attach+0x74/0xa4
[    3.177492] [<ffffff80083884c8>] bus_for_each_dev+0x80/0x90
[    3.177497] [<ffffff800838996c>] driver_attach+0x20/0x28
[    3.177502] [<ffffff80083895e8>] bus_add_driver+0x194/0x1d8
[    3.177508] [<ffffff800838a93c>] driver_register+0x98/0xd0
[    3.177513] [<ffffff800838b7cc>] __platform_driver_register+0x48/0x50
[    3.177521] [<ffffff80089376a8>] disp_module_init+0x114/0x130
[    3.177527] [<ffffff80080834d0>] do_one_initcall+0x118/0x13c
[    3.177534] [<ffffff8008920ce0>] do_initcall_level+0x188/0x18c
[    3.177538] [<ffffff8008920e5c>] kernel_init_freeable+0x178/0x18c
[    3.177544] [<ffffff80086f591c>] kernel_init+0x10/0xf8
[    3.177549] [<ffffff8008083180>] ret_from_fork+0x10/0x50
[    3.177557] Code: bad PC value
[    3.177564] ---[ end trace 821b72191e975cd3 ]---
[    3.177600] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[    3.177600] 
[    3.177603] SMP: stopping secondary CPUs
[    3.177610] Kernel Offset: disabled
[    3.177615] Memory Limit: none
[    5.036050] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[    5.036050]

@daizebin 我使用的时resize2fs这个指令调整文件系统分区大小的

@yuzukitsuru 感谢大佬 ，昨天按照你的指示检查了一下，rootfs.img确实有问题，需要额外加一句调整分区的指令才可以；后面得空再研究如何使用overlayfs，特别感谢

环境：
emmc：8G
平台：r818
系统：tina + ubuntu

现象描述：
当挂载的rootfs.img小于4G时，系统可以正常启动；当rootfs.img大于4G时，系统开机卡在挂载根文件系统系统阶段。

目前给的分区大小：

[partition]
    name         = rootfs
    size         = 10485760   # 5G大小
    downloadfile = "rootfs.fex"
    user_type    = 0x8000

打包rootfs.img为4.9G大小：

creating img file, wait...
记录了5000+0 的读入
记录了5000+0 的写出
5242880000 bytes (5.2 GB, 4.9 GiB) copied, 13.2979 s, 394 MB/s
[sudo] dzh 的密码： 
mke2fs 1.44.1 (24-Mar-2018)
丢弃设备块： 完成                            
创建含有 1280000 个块（每块 4k）和 320000 个inode的文件系统
文件系统UUID：1f080f91-343c-414a-bea9-d1d0933daab1
超级块的备份存储于下列块： 
	32768, 98304, 163840, 229376, 294912, 819200, 884736

正在分配组表： 完成                            
正在写入inode表： 完成                            
创建日志（16384 个块） 完成
写入超级块和文件系统账户统计信息： 已完成

img file ----- ok!
copy file to img,wait...
mnt:
bin  boot  dev	etc  home  lib	lost+found  media  mnt	opt  proc  root  run  sbin  srv  sys  tmp  usr	var
copy file ----- ok!
-rw-rw-r-- 1 dzh dzh 4.9G Sep 30 16:32 rootfs.img
=============== filesystem: rootfs.img created ==============

打包烧录到平台上时，报错如下：

[    4.636292] ALSA device list:
[    4.639640]   #0: audiocodec
[    4.644789] EXT4-fs (mmcblk0p5): couldn't mount as ext3 due to feature incompatibilities
[    4.657225] JBD2: no valid journal superblock found
[    4.662736] EXT4-fs (mmcblk0p5): error loading journal
[    4.669618] EXT2-fs (mmcblk0p5): error: couldn't mount because of unsupported optional features (2c0)
[    4.682958] EXT4-fs (mmcblk0p5): couldn't mount as ext3 due to feature incompatibilities
[    4.692129] plugin --> switch:1
[    4.699038] JBD2: no valid journal superblock found
[    4.704546] EXT4-fs (mmcblk0p5): error loading journal
[    4.711452] EXT2-fs (mmcblk0p5): error: couldn't mount because of unsupported optional features (2c0)
[    4.724335] List of all partitions:
[    4.728285] b300         7634944 mmcblk0  driver: mmcblk
[    4.734302]   b301             256 mmcblk0p1 a0085546-4166-744a-a353-fca9272b8e45
[    4.742949]   b302             512 mmcblk0p2 a0085546-4166-744a-a353-fca9272b8e46
[    4.751387]   b303             512 mmcblk0p3 a0085546-4166-744a-a353-fca9272b8e47
[    4.759827]   b304           15360 mmcblk0p4 a0085546-4166-744a-a353-fca9272b8e48
[    4.768261]   b305         5242880 mmcblk0p5 a0085546-4166-744a-a353-fca9272b8e49
[    4.776695]   b306           25600 mmcblk0p6 a0085546-4166-744a-a353-fca9272b8e4a
[    4.785129]   b307             256 mmcblk0p7 a0085546-4166-744a-a353-fca9272b8e4b
[    4.793563]   103:00000    2328559 mmcblk0p8 a0085546-4166-744a-a353-fca9272b8e4c
[    4.802006] b318             512 mmcblk0rpmb  (driver?)
[    4.807901] b310            4096 mmcblk0boot1  (driver?)
[    4.813902] b308            4096 mmcblk0boot0  (driver?)
[    4.819890] No filesystem could mount root, tried:  ext3 ext4 ext2 squashfs vfat msdos ntfs
[    4.829361] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,5)
[    4.838857] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 4.9.191 #405
[    4.845805] Hardware name: sun50iw10 (DT)
[    4.850312] Call trace:
[    4.853070] [<ffffff8008087938>] dump_backtrace+0x0/0x204
[    4.859142] [<ffffff8008087b50>] show_stack+0x14/0x1c
[    4.864826] [<ffffff80082904ec>] dump_stack+0x88/0xb0
[    4.870511] [<ffffff800811131c>] panic+0x120/0x310
[    4.875901] [<ffffff8008911228>] mount_block_root+0x21c/0x2e4
[    4.882362] [<ffffff8008911360>] mount_root+0x70/0x80
[    4.888043] [<ffffff80089114e0>] prepare_namespace+0x170/0x180
[    4.894603] [<ffffff8008910e34>] kernel_init_freeable+0x150/0x18c
[    4.901459] [<ffffff80086ef06c>] kernel_init+0x10/0xf8
[    4.907238] [<ffffff8008083180>] ret_from_fork+0x10/0x50
[    4.913209] SMP: stopping secondary CPUs
[    4.917624] Kernel Offset: disabled
[    4.921555] Memory Limit: none
[    4.925005] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,5)

请问有人遇到过这种吗，大佬们有没有解决思路提供啊

@yixiuge 大佬你好哈！最近我也在搞AIC800上ubuntu18.04的xfce桌面，我发现必须要将显示引擎端的比如fb0_format设置为rgb565格式，xfce桌面才能正常显示，如果使用默认argb8888格式，xfce桌面显示黑屏。大佬，请教一下如果想设置成xfce桌面argb8888显示，该怎样操作啊