i.MX6Q Sabre SD kernel boot crash

[BernardDAUTREVA]

I have a problem with the latest Android JB distribution (jb4.2.2_1.1.0-ga) compiled on Ubuntu 12.04.

I can compiled everything without problem, but when I try to boot the Linux kernel, it crashes and resets the board with an audible "click".

The Android ICS version provided on teh SD-card, of course, works flawlessly.

Note however that I got the same behaviour (kernel boot aborting with a "click") when i Use a 5V-1A powersupply instead of the 5V-5A supply provided with the board; I then check and see that the board is using up to about 2A when the kernel is booting, probably when switching on the various peripherals, but I can't reproduce it right now (I don't have the proper poser supply here).

I hope someone will have ideas on how I could at least work around this. I've heard someone talking about suppressing kernel power management but

     1) I don't see how (there is very few PM-related config options in menuconfig)

     2) I'm afraid this could break havoc in Android...

Here is the log of the kernel boot:

## Booting kernel from Legacy Image at 10800000 ...

   Image Name:   Linux-3.0.35-06126-g0f2d6ad-dirt

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    4766036 Bytes =  4.5 MB

   Load Address: 10008000

   Entry Point:  10008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Initializing cgroup subsys cpu

Linux version 3.0.35-06126-g0f2d6ad-dirty (dautrevaux@coLinux) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #21 SMP PREEMPT Mon Aug 19 18:06:26 CEST 2013

CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board

Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writealloc

CPU identified as i.MX6Q, silicon rev 1.2

PERCPU: Embedded 7 pages/cpu @c1325000 s6592 r8192 d13888 u32768

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 208128

Kernel command line: init=/init androidboot.console=ttymxc0 console=ttymxc0,115200n8 ip=192.168.233.128:192.168.233.1:192.168.233.1:255.255.255.0:sabresd_6dq:eth0:off fbmem=10M vmalloc=400M root=/dev/nfs nfsroot=192.168.233.1:/tftpboot/rootfs-sabresd_6dq

PID hash table entries: 2048 (order: 1, 8192 bytes)

Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)

Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)

Memory: 767MB 54MB = 821MB total

Memory: 820576k/820576k available, 228000k reserved, 431104K highmem

Virtual kernel memory layout:

    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    DMA     : 0xfbe00000 - 0xffe00000   (  64 MB)

    vmalloc : 0xd9800000 - 0xf2000000   ( 392 MB)

    lowmem  : 0xc0000000 - 0xd9000000   ( 400 MB)

    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)

    modules : 0xbf000000 - 0xbfe00000   (  14 MB)

      .init : 0xc0008000 - 0xc0045000   ( 244 kB)

      .text : 0xc0045000 - 0xc08fa938   (8919 kB)

      .data : 0xc08fc000 - 0xc0993be0   ( 607 kB)

       .bss : 0xc0993c04 - 0xc0b1b948   (1568 kB)

Preemptible hierarchical RCU implementation.

NR_IRQS:624

MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms

arm_max_freq=1GHz

MXC_Early serial console at MMIO 0x2020000 (options '115200n8')

bootconsole [ttymxc0] enabled

Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

Initializing cgroup subsys debug

Initializing cgroup subsys cpuacct

Initializing cgroup subsys freezer

CPU: Testing write buffer coherency: ok

hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available

CPU1: Booted secondary processor

CPU2: Booted secondary processor

CPU3: Booted secondary processor

Brought up 4 CPUs

SMP: Total of 4 processors activated (6324.22 BogoMIPS).

print_constraints: dummy:

NET: Registered protocol family 16

print_constraints: vddpu: 725 <--> 1300 mV at 1100 mV fast normal

print_constraints: vddcore: 725 <--> 1300 mV at 1100 mV fast normal

print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal

print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal

print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal

print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal

U-Boot 2009.08-00602-g3f71ed9 (Nov 26 2012 - 17:31:49)

CPU: Freescale i.MX6 family TO1.2 at 792 MHz

Temperature:   53 C, calibration data 0x5884c57d

[Pao_portalinks]

Hi Bernard, has this issue been solved? What is the root cause? We encounter the same issue on our i.MX6 board. Thanks!

[BernardDAUTREVA]

I just test with the already compiled uImage provided in the image_bundle tarball and I get the same result.

I wonder if this could be a compatibility problem between u-boot and the Linux kernel, as I still use the u-boot of the ICS 13.4.1 release. I will test with the proper u-boot later today but I need firts to get my SD-card reader... (I usually work only through the network, loading the kernel through TFTP and the root filesystem through NFS).

Bernard

[SergioSolis]

Hello Bernard,

The u-boot should not be a problem here since it is the same from previous versions.

I'm not sure that I got the situation here, can you confirm:

- You are able to boot using FSL's android SD Card with the 5v 5a power supply.

- You are not able to boot using FSL's android SD Card with the 5v 5a power supply.

- You are not able to boot your compiled card with any of the power supplies.

is this correct?

[BernardDAUTREVA]

Hello

This is approximately correct:

I am able to boot using FSL's android SD Card with the 5V 5A power supply

I am able to boot using FSL's android SD Card with the 5V 2A power supply

I am not able to start the board with the 5V 1A power supply (sometimes it seems to start but crash when booting the board)

However that is not too much of a problem as I have only a few 1A power supplies and mainly 2A or 5A power supplies. The behavior I get with my compiled kernel was just reminding me of the same kind of problem when a not powerful enough board was connected.

My real problem is that when I recompile the kernel and try to boot it after loading the uImage through TFTP it crashes with the messages above, just after printing the constraints for regulator vdd3p0

     I got the kernel from git://git.freescale.com/imx/linux-2.6-imx.git, tag jb4.2.2_1.1.0-ga

     I compile it as instructed using the gcc compiler provided by Google in the AOSP 4.2.2 release

     I configure it as imx6_android_defconfig

I then today was able to burn the u-boot I recompiled from the sources during the Android buildn in an SD card that I partitionned as instructed and now the kernel is able to boot almost to the end! so there is indeed a dependency to the u-boot version used that should be different between the ICS (R13.4.1) that was on the original SD Card and the one I just recompile.

My kernel was not able to boot completly however and crashes silently just after the "Freeing init memory: 244K" message (he was just before that able to mount the root filesystem on NFS).

I suspect here a problem in the declaration of some functions and structures as _devinit or _initdata in arch/arm/mach-mx6/pcie.c as when compiling th ekernel manually (can't see the message in a full android build...) I get a section mismatch in this file... However solving this conflict (by removing _init tags to a few functions and data) does not change anything...

I also have a proble wiith u-boot (only able to save the environment once) but it is probably better that I report it in a second message.

Here is the log I get when booting my kernel: (note it stops at the same point if I burn everything on teh SD card and boot with the default u-boot setup)

.## Booting kernel from Legacy Image at 10800000 ...
   Image Name:   Linux-3.0.35-06126-g0f2d6ad
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    4766136 Bytes =  4.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Initializing cgroup subsys cpu
Linux version 3.0.35-06126-g0f2d6ad (dautrevaux@coLinux) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #2 SMP PREEMPT Fri Aug 23 19:03:02 CEST 2013
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board
Ignoring unrecognised tag 0x54410008
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.2
PERCPU: Embedded 7 pages/cpu @c1323000 s6592 r8192 d13888 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 208128
Kernel command line: init=/init androidboot.console=ttymxc0 androidboot.hardware=freescale console=ttymxc0,115200n8 ip=192.168.233.128:192.168.233.1:192.168.233.1:255.255.255.0:sabresd_6dq:eth0:off fbmem=10M vmalloc=400M root=/dev/nfs nfsroot=192.168.233.1:/tftpboot/rootfs-sabresd_6dq
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 767MB 54MB = 821MB total
Memory: 820584k/820584k available, 227992k reserved, 431104K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xfbe00000 - 0xffe00000   (  64 MB)
    vmalloc : 0xd9800000 - 0xf2000000   ( 392 MB)
    lowmem  : 0xc0000000 - 0xd9000000   ( 400 MB)
    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    modules : 0xbf000000 - 0xbfe00000   (  14 MB)
      .init : 0xc0008000 - 0xc0045000   ( 244 kB)
      .text : 0xc0045000 - 0xc08f9928   (8915 kB)
      .data : 0xc08fa000 - 0xc0991bc0   ( 607 kB)
       .bss : 0xc0991be4 - 0xc0b19928   (1568 kB)
Preemptible hierarchical RCU implementation.
NR_IRQS:624
MXC GPIO hardware
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
arm_max_freq=1GHz
MXC_Early serial console at MMIO 0x2020000 (options '115200n8')
bootconsole [ttymxc0] enabled
Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
Initializing cgroup subsys debug
Initializing cgroup subsys cpuacct
Initializing cgroup subsys freezer
CPU: Testing write buffer coherency: ok
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
CPU1: Booted secondary processor
CPU2: Booted secondary processor
CPU3: Booted secondary processor
Brought up 4 CPUs
SMP: Total of 4 processors activated (6324.22 BogoMIPS).
print_constraints: dummy:
NET: Registered protocol family 16
print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal
print_constraints: vddcore: 725 <--> 1300 mV at 1100 mV fast normal
print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal
ram_console: got buffer at 3ff00000, size 100000
ram_console: uncorrectable error in header
ram_console: no valid data in buffer (sig = 0x010a0350)
console [ram-1] enabled
No AHCI save PWR: PDDQ enabled
hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.
hw-breakpoint: maximum watchpoint size is 4 bytes.
L310 cache controller enabled
l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B
bio: create slab <bio-0> at 0
mxs-dma mxs-dma-apbh: initialized
print_constraints: SPKVDD: 4200 mV
print_constraints: vmmc: 3300 mV
vgaarb: loaded
SCSI subsystem initialized
spi_imx imx6q-ecspi.0: probed
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Freescale USB OTG Driver loaded, $Revision: 1.55 $
mc_pfuze 1-0008: ID: 0,Full lay: 1 ,Metal lay: 1
mc_pfuze 1-0008: FAB: 0 ,FIN: 0
print_constraints: PFUZE100_SW1A: 300 <--> 1875 mV at 1300 mV
print_constraints: PFUZE100_SW1B: 300 <--> 1875 mV at 300 mV
print_constraints: PFUZE100_SW1C: 300 <--> 1875 mV at 1300 mV
print_constraints: PFUZE100_SW2: 800 <--> 3950 mV at 3300 mV
print_constraints: PFUZE100_SW3A: 400 <--> 1975 mV at 1500 mV
print_constraints: PFUZE100_SW3B: 400 <--> 1975 mV at 1500 mV
print_constraints: PFUZE100_SW4: 800 <--> 3950 mV at 3150 mV
print_constraints: PFUZE100_SWBST: 5000 <--> 5150 mV at 5000 mV
print_constraints: PFUZE100_VSNVS: 1200 <--> 3000 mV at 1800 mV
print_constraints: PFUZE100_VREFDDR: at 750 mV
print_constraints: PFUZE100_VGEN1: 800 <--> 1550 mV at 1500 mV
print_constraints: PFUZE100_VGEN2: 800 <--> 1550 mV at 1500 mV
print_constraints: PFUZE100_VGEN3: 1800 <--> 3300 mV at 2800 mV
print_constraints: PFUZE100_VGEN4: 1800 <--> 3300 mV at 1800 mV
print_constraints: PFUZE100_VGEN5: 1800 <--> 3300 mV at 3000 mV
print_constraints: PFUZE100_VGEN6: 1800 <--> 3300 mV at 3300 mV
imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed
mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a
MIPI CSI2 driver module loaded
Advanced Linux Sound Architecture Driver Version 1.0.24.
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
max17135_regulator_init abort: EPDC not enabled
max17135 2-0048: PMIC MAX17135 for eInk display
i2c-core: driver [max17135] using legacy suspend method
i2c-core: driver [max17135] using legacy resume method
Switching to clocksource mxc_timer1
NET: Registered protocol family 2
IP route cache hash table entries: 16384 (order: 4, 65536 bytes)
TCP established hash table entries: 65536 (order: 7, 524288 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 65536 bind 65536)
TCP reno registered
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
PCI: CLS 0 bytes, default 32
PMU: registered new PMU device of type 0
Static Power Management for Freescale i.MX6
wait mode is enabled for i.MX6
cpaddr = d9880000 suspend_iram_base=d9934000
PM driver module loaded
link up failed, DB_R0:0x00e2f100, DB_R1:0x08200000!
IMX PCIe port: link down with power supply 1!
IMX usb wakeup probe
the wakeup pdata is 0xd65f0f60
add wake up source irq 75
IMX usb wakeup probe
the wakeup pdata is 0xd65f0ce0
cpu regulator mode:ldo_bypass
_regulator_get: get() with no identifier
mx6_cpu_regulator_init: failed to get pu regulator
i.MXC CPU frequency driver
highmem bounce pool size: 64 pages
ashmem: initialized
NTFS driver 2.1.30 [Flags: R/O].
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
fuse init (API version 7.16)
msgmni has been set to 760
NET: Registered protocol family 38
cryptodev: driver loaded.
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed
MIPI DSI driver module loaded
mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver ldb
_regulator_get: get() with no identifier
imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver hdmi
mxc_hdmi mxc_hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
fbcvt: 1920x1080@60: CVT Name - 2.073M9
mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver ldb
imx-sdma imx-sdma: loaded firmware 1.1
imx-sdma imx-sdma: initialized
Serial: IMX driver
imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX
imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX
console [ttymxc0] enabled, bootconsole disabled
console [ttymxc0] enabled, bootconsole disabled
loop: module loaded
m25p80 spi0.0: found m25p32, expected sst25vf016b
m25p80 spi0.0: m25p32 (4096 Kbytes)
Creating 2 MTD partitions on "m25p80":
0x000000000000-0x000000100000 : "bootloader"
0x000000100000-0x000000400000 : "kernel"
GPMI NAND driver registered. (IMX)
vcan: Virtual CAN interface driver
CAN device driver interface
flexcan netdevice driver
FEC Ethernet Driver
fec_enet_mii_bus: probed
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
PPP BSD Compression module registered
PPP MPPE Compression module registered
NET: Registered protocol family 24
PPTP driver version 0.8.5
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000
fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
add wake up source irq 72
fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2
fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200
fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
usbcore: registered new interface driver cdc_acm
cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usbcore: registered new interface driver usbserial
usbserial: USB Serial Driver core
USB Serial support registered for GSM modem (1-port)
usbcore: registered new interface driver option
option: v0.7.2:USB Driver for GSM modems
USB Serial support registered for Qualcomm USB modem
usbcore: registered new interface driver qcserial
ARC USBOTG Device Controller driver (1 August 2005)
android_usb gadget: Mass Storage Function, version: 2009/09/11
android_usb gadget: Number of LUNs=1
lun0: LUN: removable file: (no medium)
Gadget Android: controller 'fsl-usb2-udc' not recognized
android_usb gadget: android_usb ready
Suspend udc for OTG auto detect
USB Host suspend begins
will suspend roothub and its children
ehci_fsl_bus_suspend begins, DR
ehci_fsl_bus_suspend ends, DR
host suspend ends
USB Gadget resume begins
fsl_udc_resume, Wait for wakeup thread finishes
dr_controller_run: udc out low power mode
USB Gadget resume ends
fsl-usb2-udc: bind to driver android_usb
mousedev: PS/2 mouse device common for all mice
input: gpio-keys as /devices/platform/gpio-keys/input/input0
input: max11801_ts as /devices/platform/imx-i2c.1/i2c-1/1-0048/input/input1
egalax_ts 1-0004: egalax_ts: failed to read firmware version
egalax_ts: probe of 1-0004 failed with error -5
input: eGalax Touch Screen as /devices/platform/imx-i2c.2/i2c-2/2-0004/input/input2
android_work: did not send uevent (0 0   (null))
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
elan - Read Hello Packet Failed
elan-touch: probe of 2-0010 failed with error -22
input: isl29023 light sensor as /devices/virtual/input/input3
isl29023 2-0044: driver version 1.0 enabled
i2c-core: driver [isl29023] using legacy suspend method
i2c-core: driver [isl29023] using legacy resume method
using rtc device, snvs_rtc, for alarms
snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
android_work: sent uevent USB_STATE=CONNECTED
android_work: sent uevent USB_STATE=DISCONNECTED
camera ov5642 is found
USB Gadget resume begins
fsl_udc_resume, Wait for wakeup thread finishes
android_work: sent uevent USB_STATE=CONNECTED
camera ov5640_mipi is found
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video19
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video20
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.1.0)
mag3110 2-000e: check mag3110 chip ID
input: mag3110 as /devices/virtual/input/input4
mag3110 2-000e: mag3110 is probed
i2c-core: driver [mag3110] using legacy suspend method
i2c-core: driver [mag3110] using legacy resume method
input: mma845x as /devices/virtual/input/input5
imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1)
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.20.0-ioctl (2011-02-02) initialised: dm-devel@redhat.com
Bluetooth: Virtual HCI driver ver 1.3
Bluetooth: HCI UART driver ver 2.2
Bluetooth: HCIATH3K protocol initialized
Bluetooth: Generic Bluetooth USB driver ver 0.6
usbcore: registered new interface driver btusb
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA
mmc1: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA
mmc2: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA
mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
VPU initialized
mxc_asrc registered
revserved_memory_account:viv_gpu registerd
Thermal calibration data is 0x5884c57d
Thermal sensor with ratio = 183
Anatop Thermal registered as thermal_zone0
anatop_thermal_probe: default cooling device is cpufreq!
Registered led device: chg_now_led
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
logger: created 256K log 'log_main'
logger: created 256K log 'log_events'
logger: created 256K log 'log_radio'
logger: created 256K log 'log_system'
usbcore: registered new interface driver snd-usb-audio
mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio
Cirrus Logic CS42888 ALSA SoC Codec Driver
i2c-core: driver [cs42888] using legacy suspend method
i2c-core: driver [cs42888] using legacy resume method
mmc0: new high speed DDR MMC card at address 0001
mmcblk0: mmc0:0001 SEM08G 7.39 GiB
mmcblk0boot0: mmc0:0001 SEM08G partition 1 2.00 MiB
mmcblk0boot1: mmc0:0001 SEM08G partition 2 2.00 MiB
mmcblk0: unknown partition table
mmcblk0boot1: unknown partition table
mmcblk0boot0: unknown partition table
wm8962 0-001a: customer id 0 revision D
input: WM8962 Beep Generator as /devices/platform/imx-i2c.0/i2c-0/0-001a/input/input6
asoc: wm8962 <-> imx-ssi.1 mapping ok
input: wm8962-audio DMIC as /devices/platform/soc-audio.5/sound/card0/input7
input: wm8962-audio Headphone Jack as /devices/platform/soc-audio.5/sound/card0/input8
imx_3stack asoc driver
asoc: mxc-hdmi-soc <-> imx-hdmi-soc-dai.0 mapping ok
ALSA device list:
  #0: wm8962-audio
  #1: imx-hdmi-soc
oprofile: using arm/armv7-ca9
GACT probability NOT on
Mirror/redirect action on
u32 classifier
    Actions configured
Netfilter messages via NETLINK v0.30.
nf_conntrack version 0.5.0 (12821 buckets, 51284 max)
mmc1: new high speed SDHC card at address 0002
mmcblk1: mmc1:0002 00000 7.41 GiB
ctnetlink v0.93: registering with nfnetlink.
mmcblk1: p1 p2 p3 < p5 p6 p7 p8 p9 > p4
NF_TPROXY: Transparent proxy support initialized, version 4.1.0
NF_TPROXY: Copyright (c) 2006-2007 BalaBit IT Ltd.
xt_time: kernel timezone is -0000
IPv4 over IPv4 tunneling driver
GRE over IPv4 demultiplexor driver
ip_tables: (C) 2000-2006 Netfilter Core Team
arp_tables: (C) 2002 David S. Miller
TCP cubic registered
NET: Registered protocol family 10
Mobile IPv6
ip6_tables: (C) 2000-2006 Netfilter Core Team
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
NET: Registered protocol family 15
can: controller area network core (rev 20090105 abi 8)
NET: Registered protocol family 29
can: raw protocol (rev 20090105)
can: broadcast manager protocol (rev 20090105 t)
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: HIDP (Human Interface Emulation) ver 1.2
L2TP core driver, V2.0
PPPoL2TP kernel driver, V2.0
L2TP IP encapsulation support (L2TPv3)
L2TP netlink interface
L2TP ethernet pseudowire support (L2TPv3)
lib80211: common routines for IEEE802.11 drivers
lib80211_crypt: registered algorithm 'NULL'
lib80211_crypt: registered algorithm 'WEP'
lib80211_crypt: registered algorithm 'CCMP'
lib80211_crypt: registered algorithm 'TKIP'
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
Bus freq driver module loaded
Bus freq driver Enabled
mxc_dvfs_core_probe
DVFS driver module loaded
regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN3: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN2: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN1: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-02 00:59:59 UTC (89999)
eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:01, irq=-1)
ADDRCONF(NETDEV_UP): eth0: link is not ready
ehci_fsl_bus_suspend begins, Host 1
ehci_fsl_bus_suspend ends, Host 1
PHY: 1:01 - Link is Up - 100/Full
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
IP-Config: Complete:
     device=eth0, addr=192.168.233.128, mask=255.255.255.0, gw=192.168.233.1,
     host=sabresd_6dq, domain=, nis-domain=(none),
     bootserver=192.168.233.1, rootserver=192.168.233.1, rootpath=
VFS: Mounted root (nfs filesystem) on device 0:12.
Freeing init memory: 244K

[BernardDAUTREVA]

I just tried with the NFS filesystem provided in the ga_image package and both my kernel and the official kernel works fine, as long as I use the u-boot image provided with the 4.2.2-1.1.0-ga_image package. If I use the u-boot on the original SD Card (R13.4.1 ICS) I get the abort soon in the kernel boot as explained in my first post.

So there is at least two differences between the two u-boot versions:

     Some initializations are different, thus the newe kernels can't boot from a board initialized by the older u-boot

     The new u-boot REFUSES to save the "botcmd" environment variable: I can change and save the content of ANY variable EXCEPT bootcmd

          I think that is VERY unconvenient! I will look at the u-boot source code to try to understand what happens;

          I wonder if the variable is saved correctly but overwritten at u-boot start...

The kernel stop I noticed after the "Freeing init memory: 244K" message seems to be caused by the root filesystem; however I still have to understand what as different between the released NFS image and the one I constructed, but I have some ideas about that an shoud be able to solve that.

I will post again when everything works and I was able to correct the u-boot behavior.