Hi Guys,
I'm new to the forum and i'm not sure if this is the right place to post this topic.
I've just bought mi router 3g
and flashed with latest openwrt using this Guide
after the reboot the routers goes in kernel panic and reboots in a loop
can't use the boatload menu it automatically goes to option 3
If any one have been gone through similar problem or have any good advice
i'm all ears 
Here is the output from the router:
===================================================================
MT7621 stage1 code 10:33:11 (ASIC)
CPU=50000000 HZ BUS=12500000 HZ
==================================================================
Change MPLL source from XTAL to CR...
do MEMPLL setting..
MEMPLL Config : 0x11100000
3PLL mode + External loopback
=== XTAL-40Mhz === DDR-1200Mhz ===
PLL3 FB_DL: 0xe, 1/0 = 540/484 39000000
PLL4 FB_DL: 0x10, 1/0 = 691/333 41000000
PLL2 FB_DL: 0x12, 1/0 = 575/449 49000000
do DDR setting..[00320381]
Apply DDR3 Setting...(use customer AC)
0 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120
--------------------------------------------------------------------------------
0000:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0001:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0002:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0003:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0004:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0005:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0006:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0007:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0008:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0009:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000A:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000B:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000C:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
000D:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
000E:| 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1
000F:| 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0
0010:| 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
0011:| 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0012:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0013:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0014:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0015:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0016:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0017:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0018:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0019:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001A:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001B:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001C:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001D:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001E:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
001F:| 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
rank 0 coarse = 15
rank 0 fine = 72
B:| 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0
opt_dle value:11
DRAMC_R0DELDLY[018]=00001E1C
==================================================================
RX DQS perbit delay software calibration
==================================================================
1.0-15 bit dq delay value
==================================================================
bit| 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 | 7 4 5 7 6 6 6 5 5 7
10 | 8 9 7 10 7 9
--------------------------------------
==================================================================
2.dqs window
x=pass dqs delay value (min~max)center
y=0-7bit DQ of every group
input delay:DQS0 =28 DQS1 = 30
==================================================================
bit DQS0 bit DQS1
0 (1~56)28 8 (1~56)28
1 (1~52)26 9 (1~56)28
2 (0~50)25 10 (1~55)28
3 (1~55)28 11 (0~56)28
4 (1~55)28 12 (1~56)28
5 (1~55)28 13 (1~56)28
6 (0~54)27 14 (3~58)30
7 (1~56)28 15 (1~58)29
==================================================================
3.dq delay value last
==================================================================
bit| 0 1 2 3 4 5 6 7 8 9
--------------------------------------
0 | 7 6 8 7 6 6 7 5 7 9
10 | 10 11 9 12 7 10
==================================================================
==================================================================
TX perbyte calibration
==================================================================
DQS loop = 15, cmp_err_1 = ffff0000
dqs_perbyte_dly.last_dqsdly_pass[0]=15, finish count=1
dqs_perbyte_dly.last_dqsdly_pass[1]=15, finish count=2
DQ loop=15, cmp_err_1 = ffff0182
DQ loop=14, cmp_err_1 = ffff0000
dqs_perbyte_dly.last_dqdly_pass[0]=14, finish count=1
dqs_perbyte_dly.last_dqdly_pass[1]=14, finish count=2
byte:0, (DQS,DQ)=(8,8)
byte:1, (DQS,DQ)=(8,8)
20,data:88
[EMI] DRAMC calibration passed
===================================================================
MT7621 stage1 code done
CPU=50000000 HZ BUS=12500000 HZ
===================================================================
U-Boot 1.1.3 (Apr 17 2018 - 02:09:51)
Board: Ralink APSoC DRAM: 256 MB
Power on memory test. Memory size= 256 MB...OK!
relocate_code Pointer at: 8ffac000
Config XHCI 40M PLL
******************************
Software System Reset Occurred
******************************
Allocate 16 byte aligned buffer: 8ffe1090
Enable NFI Clock
# MTK NAND # : Use HW ECC
NAND ID [C8 D1 80 95 40]
Device not found, ID: c8d1
Not Support this Device!
chip_mode=00000001
Support this Device in MTK table! c8d1
select_chip
[NAND]select ecc bit:4, sparesize :64 spare_per_sector=16
Signature matched and data read!
load_fact_bbt success 1023
load fact bbt success
[mtk_nand] probe successfully!
mtd->writesize=2048 mtd->oobsize=64, mtd->erasesize=131072 devinfo.iowidth=8
..============================================
Ralink UBoot Version: 5.0.0.0
--------------------------------------------
ASIC MT7621A DualCore (MAC to MT7530 Mode)
DRAM_CONF_FROM: Auto-Detection
DRAM_TYPE: DDR3
DRAM bus: 16 bit
Xtal Mode=5 OCP Ratio=1/4
Flash component: NAND Flash
Date:Apr 17 2018 Time:02:09:51
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:256, ways:4, linesz:32 ,total:32768
##### The CPU freq = 880 MHZ ####
estimate memory size =256 Mbytes
#Reset_MT7530
set LAN/WAN LWLLL
Please choose the operation:
1: Load system code to SDRAM via TFTP.
2: Load system code then write to Flash via TFTP.
3: Boot system code via Flash (default).
4: Entr boot command line interface.
7: Load Boot Loader code then write to Flash via Serial.
9: Load Boot Loader code then write to Flash via TFTP.
You choosed 3
0
Booting System 2
..ranand_erase: start:80000, len:20000
..Done!
done
3: System Boot system code via Flash.
## Booting image at bc600000 ...
Image Name: MIPS OpenWrt Linux-4.14.88
Image Type: MIPS Linux Kernel Image (lzma compressed)
Data Size: 1983865 Bytes = 1.9 MB
Load Address: 80001000
Entry Point: 80001000
............................... Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
commandline uart_en=0 factory_mode=0 usb_u3=0
No initrd
## Transferring control to Linux (at address 80001000) ...
## Giving linux memsize in MB, 256
Starting kernel ...
[ 0.000000] Linux version 4.14.88 (buildbot@6167ddb9a6c5) (gcc version 7.4.0 (OpenWrt GCC 7.4.0 r8768-9850e42)) #0 SMP Sun Dec 16 00:18:48 2018
[ 0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[ 0.000000] MIPS: machine is Xiaomi Mi Router 3G
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 10000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] VPE topology {2,2} total 4
[ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.000000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] random: get_random_bytes called from start_kernel+0x90/0x4ac with crng_init=0
[ 0.000000] percpu: Embedded 14 pages/cpu @81210000 s26256 r8192 d22896 u57344
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 65024
[ 0.000000] Kernel command line: console=ttyS0,115200n8 rootfstype=squashfs,jffs2
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Writing ErrCtl register=00058750
[ 0.000000] Readback ErrCtl register=00058750
[ 0.000000] Memory: 253104K/262144K available (4690K kernel code, 237K rwdata, 1040K rodata, 228K init, 254K bss, 9040K reserved, 0K cma-reserved, 0K highmem)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] NR_IRQS: 256
[ 0.000000] CPU Clock: 880MHz
[ 0.000000] clocksource: GIC: mask: 0xffffffffffffffff max_cycles: 0xcaf478abb4, max_idle_ns: 440795247997 ns
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 4343773742 ns
[ 0.000009] sched_clock: 32 bits at 440MHz, resolution 2ns, wraps every 4880645118ns
[ 0.007814] Calibrating delay loop... 586.13 BogoMIPS (lpj=2930688)
[ 0.073978] pid_max: default: 32768 minimum: 301
[ 0.078750] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.085258] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.094070] Hierarchical SRCU implementation.
[ 0.099225] smp: Bringing up secondary CPUs ...
[ 0.116737] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.116746] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.116758] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.116895] CPU1 revision is: 0001992f (MIPS 1004Kc)
[ 0.163976] Synchronize counters for CPU 1: done.
[ 0.210871] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.210882] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.210891] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.210962] CPU2 revision is: 0001992f (MIPS 1004Kc)
[ 0.255120] Synchronize counters for CPU 2: done.
[ 0.297909] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.297918] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.297927] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.298007] CPU3 revision is: 0001992f (MIPS 1004Kc)
[ 0.340301] Synchronize counters for CPU 3: done.
[ 0.370163] smp: Brought up 1 node, 4 CPUs
[ 0.377957] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.387750] futex hash table entries: 1024 (order: 3, 32768 bytes)
[ 0.394051] pinctrl core: initialized pinctrl subsystem
[ 0.400674] NET: Registered protocol family 16
[ 0.415371] pull PCIe RST: RALINK_RSTCTRL = 4000000
[ 0.720657] release PCIe RST: RALINK_RSTCTRL = 7000000
[ 0.725704] ***** Xtal 40MHz *****
[ 0.729061] release PCIe RST: RALINK_RSTCTRL = 7000000
[ 0.734160] Port 0 N_FTS = 1b105000
[ 0.737629] Port 1 N_FTS = 1b105000
[ 0.741071] Port 2 N_FTS = 1b102800
[ 1.896385] PCIE2 no card, disable it(RST&CLK)
[ 1.900749] -> 21007f2
[ 1.903149] PCIE0 enabled
[ 1.905739] PCIE1 enabled
[ 1.908344] PCI host bridge /pcie@1e140000 ranges:
[ 1.913122] MEM 0x0000000060000000..0x000000006fffffff
[ 1.918272] IO 0x000000001e160000..0x000000001e16ffff
[ 1.923473] PCI coherence region base: 0xbfbf8000, mask/settings: 0x60000000
[ 1.939900] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 1.945786] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 1.951586] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 1.959234] PCI host bridge to bus 0000:00
[ 1.963268] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
[ 1.970100] pci_bus 0000:00: root bus resource [io 0xffffffff]
[ 1.975954] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[ 1.982720] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 1.992834] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
[ 1.999347] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
[ 2.006283] pci 0000:00:01.0: BAR 0: no space for [mem size 0x80000000]
[ 2.012824] pci 0000:00:01.0: BAR 0: failed to assign [mem size 0x80000000]
[ 2.019756] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
[ 2.026485] pci 0000:00:01.0: BAR 8: assigned [mem 0x60100000-0x601fffff]
[ 2.033245] pci 0000:00:01.0: BAR 9: assigned [mem 0x60200000-0x602fffff pref]
[ 2.040389] pci 0000:00:00.0: BAR 1: assigned [mem 0x60300000-0x6030ffff]
[ 2.047155] pci 0000:00:01.0: BAR 1: assigned [mem 0x60310000-0x6031ffff]
[ 2.053884] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff]
[ 2.060627] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 2.065538] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
[ 2.072298] pci 0000:02:00.0: BAR 0: assigned [mem 0x60100000-0x601fffff 64bit]
[ 2.079544] pci 0000:02:00.0: BAR 6: assigned [mem 0x60200000-0x6020ffff pref]
[ 2.086722] pci 0000:00:01.0: PCI bridge to [bus 02]
[ 2.091623] pci 0000:00:01.0: bridge window [mem 0x60100000-0x601fffff]
[ 2.098377] pci 0000:00:01.0: bridge window [mem 0x60200000-0x602fffff pref]
[ 2.106982] clocksource: Switched to clocksource GIC
[ 2.113546] NET: Registered protocol family 2
[ 2.118643] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[ 2.125528] TCP bind hash table entries: 2048 (order: 2, 16384 bytes)
[ 2.131952] TCP: Hash tables configured (established 2048 bind 2048)
[ 2.138360] UDP hash table entries: 256 (order: 1, 8192 bytes)
[ 2.144125] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[ 2.150599] NET: Registered protocol family 1
[ 2.386927] 4 CPUs re-calibrate udelay(lpj = 2924544)
[ 2.393270] Crashlog allocated RAM at address 0x3f00000
[ 2.398889] workingset: timestamp_bits=30 max_order=16 bucket_order=0
[ 2.411660] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 2.417454] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 2.428429] random: fast init done
[ 2.433790] io scheduler noop registered
[ 2.437721] io scheduler deadline registered (default)
[ 2.443740] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 2.453291] console [ttyS0] disabled
[ 2.456839] 1e000c00.uartlite: ttyS0 at MMIO 0x1e000c00 (irq = 18, base_baud = 3125000) is a 16550A
[ 2.465881] console [ttyS0] enabled
[ 2.465881] console [ttyS0] enabled
[ 2.472803] bootconsole [early0] disabled
[ 2.472803] bootconsole [early0] disabled
[ 2.481718] cacheinfo: Unable to detect cache hierarchy for CPU 0
[ 2.488695] MediaTek Nand driver init, version v2.1 Fix AHB virt2phys error
[ 2.495763] Enable NFI Clock
[ 2.498677] # MTK NAND # : Use HW ECC
[ 2.502345] Device found in MTK table, ID: c8d1, EXT_ID: 809540
[ 2.508269] Support this Device in MTK table! c8d1
[ 2.513216] [NAND]select ecc bit:4, sparesize :64 spare_per_sector=16
[ 2.519691] nand: device found, Manufacturer ID: 0xc8, Chip ID: 0xd1
[ 2.526012] nand: ESMT NAND 128MiB 3,3V 8-bit
[ 2.530361] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[ 2.537928] Scanning device for bad blocks
[ 2.686193] 10 fixed-partitions partitions found on MTD device MT7621-NAND
[ 2.693050] Creating 10 MTD partitions on "MT7621-NAND":
[ 2.698364] 0x000000000000-0x000000080000 : "Bootloader"
[ 2.704823] 0x000000080000-0x0000000c0000 : "Config"
[ 2.710867] 0x0000000c0000-0x000000100000 : "Bdata"
[ 2.716761] 0x000000100000-0x000000140000 : "Factory"
[ 2.722894] 0x000000140000-0x000000180000 : "crash"
[ 2.728902] 0x000000180000-0x0000001c0000 : "crash_syslog"
[ 2.735446] 0x0000001c0000-0x000000200000 : "reserved0"
[ 2.741795] 0x000000200000-0x000000600000 : "kernel_stock"
[ 2.748358] 0x000000600000-0x000000a00000 : "kernel"
[ 2.754391] 0x000000a00000-0x000007f80000 : "ubi"
[ 2.761134] [mtk_nand] probe successfully!
[ 2.765944] Signature matched and data read!
[ 2.770210] load_fact_bbt success 1023
[ 2.774753] libphy: Fixed MDIO Bus: probed
[ 2.849536] libphy: mdio: probed
[ 4.253106] mtk_soc_eth 1e100000.ethernet: loaded mt7530 driver
[ 4.259762] mtk_soc_eth 1e100000.ethernet eth0: mediatek frame engine at 0xbe100000, irq 20
[ 4.270556] NET: Registered protocol family 10
[ 4.276371] Segment Routing with IPv6
[ 4.280185] NET: Registered protocol family 17
[ 4.284671] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 4.297588] 8021q: 802.1Q VLAN Support v1.8
[ 4.304873] UBI: auto-attach mtd9
[ 4.308239] ubi0: attaching mtd9
[ 4.340542] ubi0 error: ubi_attach: bad image sequence number 515969917 in PEB 25, expected 220253218
[ 4.349732] Erase counter header dump:
[ 4.353462] magic 0x55424923
[ 4.357201] version 1
[ 4.360151] ec 1
[ 4.363097] vid_hdr_offset 2048
[ 4.366303] data_offset 4096
[ 4.369527] image_seq 515969917
[ 4.373169] hdr_crc 0xb731e76b
[ 4.376893] erase counter header hexdump:
[ 4.380951] ubi0 error: ubi_attach_mtd_dev: failed to attach mtd9, error -22
[ 4.388011] UBI error: cannot attach mtd9
[ 4.392028] hctosys: unable to open rtc device (rtc0)
[ 4.397309] usb_vbus: disabling
[ 4.401007] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[ 4.408501] Please append a correct "root=" boot option; here are the available partitions:
[ 4.416827] 1f00 512 mtdblock0
[ 4.416833] (driver?)
[ 4.423358] 1f01 256 mtdblock1
[ 4.423363] (driver?)
[ 4.429883] 1f02 256 mtdblock2
[ 4.429889] (driver?)
[ 4.436388] 1f03 256 mtdblock3
[ 4.436391] (driver?)
[ 4.442908] 1f04 256 mtdblock4
[ 4.442913] (driver?)
[ 4.449433] 1f05 256 mtdblock5
[ 4.449438] (driver?)
[ 4.455937] 1f06 256 mtdblock6
[ 4.455940] (driver?)
[ 4.462457] 1f07 4096 mtdblock7
[ 4.462461] (driver?)
[ 4.468979] 1f08 4096 mtdblock8
[ 4.468985] (driver?)
[ 4.475485] 1f09 120320 mtdblock9
[ 4.475489] (driver?)
[ 4.482005] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 4.492247] Rebooting in 1 seconds..