100% CE can boot from USB, any other OS is another matter.
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Considering the Andrioid on eMMC and the CE on USB flash.
Can i freely switch between Android and CE by pluging in/out USB flash?
Does the VIM3 output max fall cll metadata like the odroid n2?
Already issued for china local pre-order! 
For video playback, VIN3 has Dolby Vision and HDR10, HDR10 +, HLG and PRIME HDR video processing.
Not clear if they are currently working?
And how can Dolby Vision and HDR10, HDR10 +, HLG and PRIME HDR play N2?
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Although the S922X and A311D is compatible with those HDR formats the kernel has only HDR10 and HLG support right now. There are HDR10+ routines in the source, but it is buggy and not complete.
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@TheCoolest, just tried vfd on vim3 use vim2’s config file, not working. could you update the config file for vim3?
@anon88919003, @Portisch, VIM3 can wakeup by remote from suspending , but can’t wakeup from shutdown.
VIM3 is not pin compatible with VIM2, you need to modify the config and use the correct pins.
That’s normal behaviour, if you shutdown then the IR will not listen for wakeup.
OK， Thanks for reply.
Vim3 on hands! Can not boot from USB via key mode using the latest NG version. Any suggestions？
Read the above link and refer to “Keys mode” instructions.
I tried the recommended TST mode, did not make it.
TST is only recommended for recovering Android, it will not work for CoreELEC, follow the instructions given in my previous post.
write TF card
in TF’s root directoy , make a copy of aml_autoscript, rename the copy file to aml_autoscript.zip, copy vim3.dtb to root dirctory. rename to dtb.img
boot vim3 without TF ,after booted, plugin TF card
in settings, about ,update, select aml_autoscript.zip click update.
when did updating, I got errors, seems it does not matter.I don’t know if it is right way.
But I did this make vim3 booting from TF, maybe this will help you
Great thanks! Make it! But remote controller can not be used.
One usb for CE, one for mouse, the media usb hard disk only crying.
Still thanks, my personal use need to constantly switch OS, so usb will be more endurable. And USB speed is far faster than SD on VIM3. I put CE into Samsung Bar+ 128G usb stick which could reach 300MB/s speed on VIM3 usb3.0 port.
It doesn’t work
CoreELEC (official): nightly_20190810 (Amlogic-ng.arm)
dmesg
[ 19.197098@1] OpenVFD: Version: V1.3.0
[ 19.197106@1] OpenVFD: vfd_gpio_clk: #0 = 0x00; #1 = 0x40; #2 = 0x00;
[ 19.197109@1] OpenVFD: vfd_gpio_dat: #0 = 0x00; #1 = 0x3F; #2 = 0x00;
[ 19.197112@1] OpenVFD: vfd_gpio_stb: #0 = 0x00; #1 = 0x00; #2 = 0xFF;
[ 19.197115@1] OpenVFD: vfd_gpio0: #0 = 0x00; #1 = 0x00; #2 = 0xFF;
[ 19.197118@1] OpenVFD: vfd_gpio1: #0 = 0x00; #1 = 0x00; #2 = 0xFF;
[ 19.197121@1] OpenVFD: vfd_gpio2: #0 = 0x00; #1 = 0x00; #2 = 0xFF;
[ 19.197124@1] OpenVFD: vfd_gpio3: #0 = 0x00; #1 = 0x00; #2 = 0xFF;
[ 19.197126@1] OpenVFD: vfd_gpio_protocol: #0 = 0x00; #1 = 0x00;
[ 19.197130@1] OpenVFD: vfd_chars: #0 = 0x00; #1 = 0x01; #2 = 0x02; #3 = 0x03; #4 = 0x04;
[ 19.197135@1] OpenVFD: vfd_dot_bits: #0 = 0x00; #1 = 0x01; #2 = 0x02; #3 = 0x03; #4 = 0x04; #5 = 0x05; #6 = 0x06;
[ 19.197138@1] OpenVFD: vfd_display_type: #0 = 0x1F; #1 = 0x3C; #2 = 0x00; #3 = 0xFD;
[ 19.197143@1] OpenVFD: Detected gpio chips: periphs-banks, aobus-banks.
[ 19.197147@1] OpenVFD: “periphs-banks” chip found. base = 410, pin count = 86, pin = 64, offset = 474
[ 19.197149@1] OpenVFD: “periphs-banks” chip found. base = 410, pin count = 86, pin = 63, offset = 473
[ 19.197150@1] OpenVFD: Skipping vfd_gpio_stb evaluation (0xFF)
[ 19.197152@1] OpenVFD: Skipping vfd_gpio0 evaluation (0xFF)
[ 19.197153@1] OpenVFD: Skipping vfd_gpio1 evaluation (0xFF)
[ 19.197155@1] OpenVFD: Skipping vfd_gpio2 evaluation (0xFF)
[ 19.197156@1] OpenVFD: Skipping vfd_gpio3 evaluation (0xFF)
[ 19.197167@1] ffd1c000.i2c is using the pin GPIOA_14 as pinmux
[ 19.197174@1] meson-g12a-pinctrl pinctrl@ff634480: request() failed for pin 6 4
[ 19.197177@1] meson-g12a-pinctrl pinctrl@ff634480: pin-64 (periphs-banks:474) status -22
[ 19.197179@1] OpenVFD: can’t request gpio of gpio_clk
[ 19.197190@1] openvfd: probe of openvfd failed with error -22
PS: on odroid-n2, 20190811 nightbuild makes OLED not working , so I tested under 0810 build.
Anyone know how to make the Khadas remote controll work? thanks!