My Duo 4K as been doing the same/similar thing too, it gets stuck on the Vu+ logo, so before E2 as started as far as I know. It is on PLI nightly developer builds and did it when I was using ViX on it. Even deep standby is an issue and you have to reflash to get out of it. Flash by USB or Ofgwrite does not matter.
Console log is attached. Small excerpt below
Code:
INIT: version 2.88 booting
Fuse filesystem already available.
Mounting fuse control filesystem.
Starting udev
[ 3.278339] udevd[790]: starting version 3.2.8
[ 3.292888] random: udevd urandom read with 24 bits of entropy available
[ 3.313248] udevd[791]: starting eudev-3.2.8
[ 3.657192] usb 1-2: new high-speed USB device number 2 using xhci-brcm
[ 3.777407] EXT4-fs (sda1): recovery complete
[ 3.781814] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 3.789726] hub 1-2:1.0: USB hub found
[ 3.793545] hub 1-2:1.0: 4 ports detected
[ 3.900185] usb 1-1: new high-speed USB device number 3 using xhci-brcm
[ 4.020840] hub 1-1:1.0: USB hub found
[ 4.024666] hub 1-1:1.0: 4 ports detected
[ 5.072180] usb 1-2.4: new full-speed USB device number 4 using xhci-brcm
[ 5.241177] usb 1-2.3: new high-speed USB device number 5 using xhci-brcm
[ 5.347537] EXT4-fs (mmcblk0p9): re-mounted. Opts: (null)
grep: /sys/devices/platform/Fixed: No such file or directory
grep: MDIO: No such file or directory
grep: bus.0/modalias: No such file or directory
/etc/rcS.d/S21bootlogo: line 4: /proc/stb/video/videomode: No such file or directory
/dev/dvb/adapter0/video0: No such file or directory
vm.dirty_writeback_centisecs = 300
vm.dirty_background_ratio = 1
vm.dirty_ratio = 60
ALSA: Restoring mixer settings...
/usr/sbin/alsactl: load_state:1735: No soundcards found...
wifi found
Vendor 0x1d6b ID 0x3
Vendor 0xa5c ID 0xbd27
usb_set_debug: Setting debugging level to 255 (on)
claiming interface 0
Found device: vend=0xa5c prod=0xbd27
File Length: 572654
ID : Chip 0xaa31 Rev 0x2RamSize 786432 RemapBase 0x00180800 BoardType 0 BoardRev 0
start
[ 8.853086] random: nonblocking pool is initialized