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************************************************
Release Notes:  Linux Image V2.x for Colibri T30
************************************************

Contents:
- U-Boot 2015.04 boot loader
- Linux 3.1.10 kernel, based on NVIDIA's Linux for Tegra (L4T) release R16.5
- Angstrom 2015.06/OpenEmbedded fido/Yocto 1.8 based root file system, using
  LXDE desktop environment

==> Flashing instructions can be found on the Toradex developer article:
http://developer.toradex.com/knowledge-base/flashing-linux-on-tegra-modules

Licensing:
- proprietary multimedia codecs included for evaluation purpose only
- customer required to obtain proper re-distribution license

********************************************************************************
Linux Image V2.5 Beta 3 (December 15, 2015)
- U-Boot boot loader:
  - disable delete-null-pointer-checks compiler flag fixing memory test crashes
- Linux kernel:
  - enable RTL8192CU driver e.g. for LM006 USB Wi-Fi stick
  - add multitouch HID support
  - ADV7280 V4L2 integration e.g. for new Toradex ACA V2.x (formerly ACM)
- Linux user-space:
  - make sure USB RNDIS Gadget is started before networkd
  - use new Toradex feed server as default feed URI
- OpenEmbedded build system:
  - fix memcpy.patch to apply to Linaro layer and openembedded layer glibc
  - remove create_configblock.sh from deployment tarball
  - add rtl8192cu firmware for LM006 USB Wi-Fi adapter
  - add README with dependency and contribution information
  - backport rtl8192cx for latest available firmware

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.5Beta3_20151215
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch 2015.04-toradex

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that
    neither headphone out nor mic in works anymore. Workaround: Have mic
    connected before boot or change the output source between DAC/LineIn
- on first boot the resizing process adversely affects system performance for
    the first few minutes until completed
- Ethernet aka TFTP update requires manual splitting of the root.ext3 file
    which can be taken care of by the -c argument of our update.sh script.
- LP1 suspend might fail due to pending USB interrupts
- LP1 suspend might hang due to display controller issue

********************************************************************************
Linux Image V2.5 Beta 2 (November 6, 2015)
- U-Boot boot loader:
  - add return code for cfgblock commands which allows scripting
  - increase TFTP blocksize for better performance
  - fix framebuffer console regression
  - integrate display driver
  - enabled zero bootdelay check (allows entering U-Boot when bootdelay is 0)
  - move environment to the end of the eMMC boot area before the config block
- Linux kernel:
  - integrate ASIX USB-to-Ethernet driver 4.17.0
  - fix USB performance regression
  - integrate various eMMC fixes
  - fix USB host device detection with Colibri OTG driver
  - changed Fusion multi touch event reporting to adhere to multitouch slot
  - fix HS UART HW buffer overrun issue
- Linux user-space:
  - updated to latest Angstrom 2015.06/OpenEmbedded fido:
    - glibc 2.22
    - systemd 219
    - Xorg 1.16.1
  - glibc: force memcpy_arm to improve memcpy performance
  - fw_printenv/setenv: follow U-Boot environment move
  - fix USB RNDIS operation
  - nv-conf-systemd: cpu hot-plug configuration and startup
- OpenEmbedded build system:
  - change default tune to Thumb-2
  - local.conf: add Toradex source mirror as pre-mirror
- Update scripts:
  - Ethernet aka TFTP update: provide option to split rootfs output file
  - update.sh: delete intermediate files after use
  - improved update.sh to use module type specific folders allowing update of
    different modules with just one update media

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.5Beta2_20151106
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch 2015.04-toradex

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that
    neither headphone out nor mic in works anymore. Workaround: Have mic
    connected before boot or change the output source between DAC/LineIn
- on first boot the resizing process adversely affects system performance for
    the first few minutes until completed
- Ethernet aka TFTP update requires manual splitting of the root.ext3 file
    which can be taken care of by the -c argument of our update.sh script.
- LP1 suspend might fail due to pending USB interrupts
- LP1 suspend might hang due to display controller issue

********************************************************************************
Linux Image V2.4 Beta 1 (May 18, 2015)
- U-Boot:
  - update to U-Boot 2015.04
  - add generic Toradex config block handling, print exact product description,
    board revision and serial number to the console
  - add command to restore Toradex config block ("cfgblock create")
  - optionally create device-tree properties which make board information
    available from within Linux userspace through procfs (/proc/device-tree/
    serial-number, toradex,board-rev and toradex,product-id)
- Linux kernel:
  - integrate NVIDIA L4T R16.5
  - optional ADV7280 analogue video decoder support
  - fix eMMC issues by retrying commands up to 10 times
  - media: fix work of analog cameras
  - enable module versioning support
  - initial support for IT modules
  - fix/improve optional 1-wire driver
  - SPI driver fix number of words in transfer
  - cleaned-up module configuration/deployment
  - SGTL5000 analogue audio codec driver improvements
- Linux user-space:
  - update OpenEmbedded from daisy to dizzy:
    - glibc 2.20 (instead of eglibc)
    - systemd 2.18
    - Xorg 1.14.7
    - updated various LXDE packages to newer versions
  - libgstomx fix to validate input frame rate
  - build tegrarcm using static cryptopp library to avoid issues e.g. on 64-bit
    Fedora
  - replace full NTP daemon with systemd's NTP client only systemd-timesyncd
  - blacklist USB RNDIS for connman, use systemd-networkd to configure RDNIS
    network interface (new standard IP of the module is 192.168.11.1!)
  - enable BusyBox resize command to resize the terminal on serial console
  - optionally deploy device-tree

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.4Beta1_20150518
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch 2015.04-toradex

Note:
- mount point names changed from /media/<block device name> to /media<label>
- no SD boot integration yet but copying cbootimage to beginning of SD card
  will at least boot

Known Issues:
- default vidargs includes 'fbcon=map:1' which causes the framebuffer console
    only ever to be visible on a DVI-D aka HDMI screen should there any such
    actually be connected. Just removing this either from within the U-Boot
    console as follows:
      setenv vidargs video=tegrafb0:640x480-16@60; saveenv
    or from within Linux:
      fw_setenv vidargs video=tegrafb0:640x480-16@60
    fixes this by defaulting back to showing it on DVI-A aka VGA resp. parallel
    RGB.
- connecting an analogue mic to the on module codec resets the codec, so that
    neither headphone out nor mic in works anymore. Workaround: Have mic
    connected before boot or change the output source between DAC/LineIn
- on first boot the resizing process adversely affects system performance for
    the first few minutes until completed
- flash_eth.img requires manual splitting of the root.ext3 file.
    see the colibri-t30_bin/flash_eth.scr script
- LP1 suspend might fail due to pending USB interrupts
- LP1 suspend might hang due to display controller issue

********************************************************************************
Linux Image V2.3 Beta 5 (December 19, 2014)
- U-Boot:
  - no changes
- Linux kernel:
  - optional ADV7180 analogue video decoder as found on ACA (formerly ACM) now
      works at 25 fps
  - fix HDMI display controller disable state
  - fix pixel clock polarity
  - fix USB low-speed issue hack
- Linux user-space:
  - fix 32-bit build of our bsp/devtools (e.g. cbootimage/tegrarcm)
  - fix fw_setenv
  - fix resizefs
  - integrate NVIDIA L4T R16.5 (fixes gstreamer memory leak)
  - add eglinfo application
  - update X server to 1.14.7 (fixes broken X server rotation)
  - don't check last mounttime on superblock
  - /etc/machine-id: ensure it is saved non-volatile
- Update script
  - reduce rootfs partition size in the MBR to the available eMMC size
      to have a valid MBR
  - fix flash_eth update scripts

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.3Beta5_20141219
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch 2014.10-toradex

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that
    neither headphone out nor mic in works anymore. Workaround: Have mic
    connected before boot or change the output source between DAC/LineIn
- on first boot the resizing process adversely affects system performance for
    the first few minutes until completed
- LP1 suspend might fail due to pending USB interrupts
- LP1 suspend might hang due to display controller issue

********************************************************************************
Linux Image V2.3 Beta 3 (October 31, 2014)
- U-Boot:
  - update to mainline U-Boot 2014.10 with new partition layout and
      cbootimage/tegrarcm based update concept
  - common config block code
  - improved NFS boot functionality
  - fw_printenv integration
- Linux kernel:
  - add a mapping for H.264 payloads to the UVC aka USB webcam driver
  - various analogue audio codec fixes/improvements noteworthy driver probe after reset
  - mark host as eMMC CMD23 capable to force using reliable write command
  - fix audio hub lock-up
  - prevent null pointer dereference in Tegra nvmap video driver
- Linux user-space:
  - switch to ARMv7 hard-float Thumb2 builds (armv7at2hf-vfp-neon)
  - add cbootimage, libcryptopp and tegrarcm recipes
  - use latest u-boot git migrated to cbootimage/tegrarcm
  - fix noisy analogue audio playback
  - introduce and deploy fw_printenv/setenv
  - updated LXDM to 0.5 with proper systemd-logind support
  - removed ConsoleKit session/login manager (superseded by systemd-logind)
  - lxsession shows hibernate button only when kernel support is available
  - various build and dependency fixes for LXDE recipes

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.3Beta3_20141031
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch 2014.10-toradex

Note:
- As we no longer rely on proprietary Fastboot/NvFlash for flashing the
  instructions at the very bottom of this release notes changed.

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that
    neither headphone out nor mic in works anymore. Workaround: Have mic
    connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- LP1 suspend might fail due to pending USB interrupts
- LP1 suspend might hang due to display controller issue
- partition resizing on first boot not working
    Change the script /usr/sbin/resizefs.sh and then run the script to have 
    it work for you:
    PART="mmcblk0p1" -> PART="mmcblk0p2"
- fw_setenv not working
- due to the flash_eth.img update script currently being broken please use the
    SD card flashing method (e.g. flash_mmc.img) for now

********************************************************************************
Linux Image V2.3 Beta 1 (August 4, 2014)
- U-Boot
  - Fix USB device enumeration problem
  - Fix out-of-tree build
- Linux kernel:
  - Fix locking in BERR counter functionality of MCP251x CAN driver
  - Disable DC when frame buffer off detected
  - Clarify MCP2515 reset
  - Add SPI controller platform data for hardware chip select
  - Use 1.8V MMC/SD quirk only on affected instances
  - Retry eMMC transfers if aborted due to argument out of range
  - Fix issue with slow SPDIF clock
  - Enable CONFIG_FHANDLE required for later systemd
  - Swap on-board vs. HDA sound card order and use HDA HDMI audio
  - Remove synchronize_rcu() from cgroup_attach_{task|proc}() to speed-up systemd boot-up
  - Enable VLAN functionality
  - Fix memset-related crashes caused by recent GCC (4.7.2) optimisations
- Linux user-space
  - Update from oe's dylan to daisy
  - Fix comments in xorg.conf files
  - Add BCT parameter sets 1-3
  - Provide the khronos headers locally
  - Replace "eglplatform.h" file
  - Prefer using EGL GLES from toradex-nv-binaries package
  - Remove machine feed URL, as it does not exist
  - Only start xinput-calibrator.service when LXDM is enabled
  - Use X server 1.14.4
  - Disable openssh's use of reverse DNS
  - Add gstreamer-rtp-manager and unclutter
  - Update GPIO config tool to V1.2

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.3Beta1_20140804
  - repository linux-toradex branch tegra
  - repository u-boot-toradex branch colibri

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that 
    neither headphone out nor mic in works anymore. Workaround: Have mic 
    connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
    the first few minutes until completed
- The Angstrom-Distribution since switched to using ARM Thumb2 instruction set.
  To use their binary feeds e.g. using the opkg package manager please change in
  /etc/opkg/base-feed.conf et. al. armv7ahf-vfp-neon to armv7at2hf-vfp-neon.
  We consider switching in our next release.

********************************************************************************
Linux Image V2.1 Beta 3 (March 18, 2014)
- U-Boot:
  - Enable hardware boot partition support (via 'mmc dev [dev] [part]' command).
  - Get rid of the spurious 'video=tegrafb' kernel boot argument and add
    'noatime' to the usbargs.
- Linux kernel:
  - Initialise high speed UART with lower default baudrate to avoid issues.
  - Merge with NVIDIA's latest L4T R16.4 kernel.
  - Added OmniVision OV7670 and Texas Instruments TVP5150 V4L2 drivers.
  - Added initial Aptina AS0260 V4L2 driver.
  - Solved low framerate issue with analogue cameras.
- rootfs / oe-core:
  - nv-binaries: update to L4T R16.4
  - Added gst-plugins-good-jpeg
- sources git.toradex.com tag Colibri_T30_LinuxImageV2.1Beta3_20140318

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that 
    neither headphone out nor mic in works anymore. Workaround: Have mic 
    connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
    the first few minutes until completed

********************************************************************************
Linux Image V2.1 Beta 2 (February 6, 2014)
- U-Boot:
  - Add more UART configurations to the device trees allowing easy switching of
    the console UART port by changing the UART base address of the console node
    within the device tree.
  - Fix EHCI periodic list handling.
  - Add default VESA VGA vidargs for our now modedb enabled kernel. This allows
    easy specifying an alternate parallel RGB resolution.
  - Fix usbboot option to be more in-line with how we do optional MMC/SD card
    boot on Colibri VF50/VF61. Loads the uimage kernel from the first partition
    being formatted as VFAT and instructs the kernel to mount the second
    partition formatted as ext3 as root file system.
- Linux kernel:
  - Use TPS6591X IRQ base define to calculate correct IRQ number.
  - Remove vdd_hdmi_con regulator from dc1 since we don't have a dedicated
    regulator for this connector on our baseboards.
  - Fix HDMI suspend/resume by avoiding division by zero oops.
  - Don't register KEY_BACK for wakeup.
  - Add STMPE ADC driver using IIO framework
    (see http://developer.toradex.com/knowledge-base/adc-(linux)).
  - Use modedb to specify framebuffer resolution (see
    http://developer.toradex.com/knowledge-base/framebuffer-(linux) and
    http://developer.toradex.com/knowledge-base/x-server-(linux)).
  - Check null pointers for sysfs calls.
  - Hack to avoid 24 Hz mode in X resulting in no display at all. This has been
    encountered using e.g. a Samsung SyncMaster F2380 if connected by HDMI.
  - Add kernel parameters to change RGB clock polarity.
  - Re-work Fusion multi-touch touchscreen driver.
  - Before updating modes on HDMI hotplug, check if framebuffer is registered
    at all. This allows to disable framebuffers completely.
- rootfs / oe-core:
  - Fix build and texinfo errors for stress.
  - Add sections for both monitor outputs to xorg.conf. Add example
    configuration to disable an output as well as select preferred mode.
  - Add entry for fusion touchscreen driver to xorg.conf.
  - Add fstrim from util-linux.
  - Add kernel module for fusion touch screens (see
    http://developer.toradex.com/knowledge-base/capacitive-multi-touch-display-(linux)).
  - burnflash: Account for fs overhead and many files.
- sources git.toradex.com tag Colibri_T30_LinuxImageV2.1Beta2_20140206

Known Issues:
- connecting an analogue mic to the on module codec resets the codec, so that 
    neither headphone out nor mic in works anymore. Workaround: Have mic 
    connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
    the first few minutes until completed

********************************************************************************
Linux Image V2.1 Beta 1 (October 22, 2013)
- U-Boot:
  - Fix possible uninitialised array member issue in serial number to
      hexadecimal coded decimal conversion routine (e.g. as used for
      /proc/cpuinfo in Linux).
- Linux kernel:
  - Fix several HDMI hang issues.
  - Support default watchdog API (see
      http://developer.toradex.com/knowledge-base/watchdog-(linux)).
  - Disable magic SysRq key configuration as this is not only a potential
       security thread but can cause serious trouble if for some reason UART pins
       are left floating and therefore cause unexpected break conditions.
  - Add DDR speed definition for 400 and 800 MHz.
  - HDMI: Retry EDID reads up to 4 times until failing.

- rootfs / oe-core:
  - OpenEmbedded: layers updated to dylan
      xserver update to version 1.14
      gtk+ updated to 2.24.15
      firefox update to 10.0.11esr
      connman now has a command line tool, connmanctl
      split the meta-lxde layer from oe-tworaz and serve it from
        git.toradex.com
  - NEON enabled build
  - hdmi: add udev rule to start an X output on hotplug
  - feed-config: use the new feed armv7ahf-vfp-neon
  - evdev: backport V2.8.1 from dora to get a fix for multitouch events
  - burnflash: script for configblock generation
  - added packages: ethtool
  - burnflash: change the Colibri image names to start with Colibri
  - burnflash: add sanity checks

- sources git.toradex.com tag Colibri_T30_LinuxImageV2.1Beta1_20131022

Known Issues:
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
    comments with timings for other resolutions provided
- connecting an analogue mic to the on module codec resets the codec, so that 
    neither headphone out nor mic in works anymore. Workaround: Have mic 
    connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
    the first few minutes until completed

********************************************************************************
Linux Image V2.0 Beta 3 (August 20, 2013)
This updates u-boot and kernel to cope with the increased eMMC and changed T30
CPU SKU on Colibri T30
- U-Boot:
  - eMMC and RAM size / offset detection
  - rename shell prompt to Colibri T30
- Linux kernel:
  - workaround limited CPU clock
  - provision for the Analogue Camera Module
  - v4l kernel drivers configured as kernel modules
- rootfs / oe-core:
  - update to latest git revision for kernel and u-boot
  - image added v4l-utils
  - removed warning output from commandline tegrastats

- sources git.toradex.com tag T30_LinuxImageV2.0Beta3_20130820

Known Issues:
- If a a monitor is connected to DVI, the kernel sometime hangs when the 
  display controller DC1 is initialised. -> reboot required. 
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
  comments with timings for other resolutions provided
- lxappearance is segfaulting upon start
- connecting an analogue mic to the on module codec resets the codec, so that 
  neither headphone out nor mic in works anymore. Workaround: Have mic 
  connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
  the first few minutes until completed

********************************************************************************
Linux Image V2.0 Beta 2 (June 26, 2013)
- U-Boot:
  - integrate NVIDIA partition table parsing incl. Toradex Colibri configuration block
  - increase CPU frequency at boot
  - decrease boot delay
  - fix overflow in HCD conversion
- Linux kernel:
  - allow easy integration of a custom Linux boot logo
  - add TouchRev Fusion 10 aka CPT CLAA101NC05 display timings
  - integrate TouchRev Fusion 7 and 10 multi-touch driver
  - fix gpio-key pull-ups
  - enable back key wake-up
  - rename UARTs and PWM LEDs
  - explicitly configure for 4-bit MMC/SD cards by default
  - integrate MCP251x and SJA1000 CAN support
  - fix Ethernet MAC address assignment after suspend
  - hack to make newer SD cards work by adding a quirk for lack of 1.8v support
  - export some GPIOs via /sys/class/gpio
  - add comment about GMI_ADV_N usage
  - remove spurious tegra_aes_device
  - video4linux adv7180 and max9526 integration
  - set board local critical temperature to 95°C
  - hack to avoid 24 Hz mode in X resulting in no display at all
- rootfs / oe-core:
  - update to latest git revision for kernel and u-boot
  - extend rootfs partition on eMMC to its full partition size on first boot
  - unified update procedure for all T20/T30
  - limit journal size
  - nv-binaries: update to L4T R16.3
  - added packages: gstreamer deinterlacer, scrot
  - lxterminal, florence: fix garbled titlebar

- sources git.toradex.com tag T30_LinuxImageV2.0Beta2_20130626

Known Issues:
- If a a monitor is connected to DVI, the kernel sometime hangs when the 
  display controller DC1 is initialised. -> reboot required. 
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
  comments with timings for other resolutions provided
- lxappearance is segfaulting upon start
- connecting an analogue mic to the on module codec resets the codec, so that 
  neither headphone out nor mic in works anymore. Workaround: Have mic 
  connected before boot or change the output source between DAC/LineIn
- certain low-speed USB devices might not get detected
- on first boot the resizing process adversely affects system performance for 
  the first few minutes until completed

********************************************************************************
Linux Image V2.0 Beta 1 (March 28, 2013)
- U-Boot:
  - no changes
- Linux kernel:
  - fbcon: logo: allow easy integration of a custom Linux boot logo
- rootfs / oe-core:
  - use newer Linux kernel
  - use latest GPIOConfig, fixed SODIMM numbers
  - use a unified recipe for the Linux kernel
  - UBOOT_MACHINE variable definition moved to machine .conf file
  - add setxkbmap package
  - add florence package, virtual keyboard application
  - burnflash: fix race condition in genext3fs.sh and use -F option for mount
  - xorg framebuffer depth 16bit
  - use new Toradex CI

- sources git.toradex.com tag T30_LinuxImageV2.0Beta1_20130314

Known Issues:
- If a a monitor is connected to DVI, the kernel sometime hangs when the 
  display controller DC1 is initialised. -> reboot required. 
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
  comments with timings for other resolutions provided
- some windows have garbled titlebar, e.g. lxterminal
- lxappearance is segfaulting upon start
- connecting an analogue mic to the on module codec resets the codec, so that 
  neither headphone out nor mic in works anymore. Workaround: Have mic 
  connected before boot or change the output source between DAC/LineIn


********************************************************************************
Linux Image V2.0 Alpha 1 (January 22, 2013)
- U-Boot:
  - moved to proper machine type
- Linux kernel:
  - added one wire platform data (conditional, CONFIG_W1_MASTER_TEGRA must be enabled)
  - fix USB hang on device insertion
  - added correct spidev platform data (/dev/spidev0.0)
  - PWM B, PWM C, PWM D now accessible from userspace, /sys/class/leds/
  - refined pin muxing
  - added thermal throttling, i.e. CPU freq. is reduced when CPU gets hot
  - updated audio codec driver, audio input now working
  - GPIO keys implementation
  - LP1 suspend support
  - moved to proper machine type
  - fix PMIC regulator platform data
- oe-core:
  - use latest u-boot and Linux kernel
  - use latest GPIOConfig, fixes issues with tristated pins and GPIO with num >222
  
- sources git.toradex.com tag T30_LinuxImageV2.0Alpha1_20130122

Known Issues:
- We are in an early Alpha state, not all functions are tested.
- If a a monitor is connected to DVI, the kernel sometime hangs when the 
  display controller DC1 is initialised. -> reboot required. 
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
  comments with timings for other resolutions provided
- some windows have garbled titlebar, e.g. lxterminal
- lxappearance is segfaulting upon start
- issues with the genext3.sh scripts: if your language settings expect 
  something different to 'y' to a question, the script failes.
  The rootfs is empty resulting in a kernel panic during boot.
  Workaround: edit line 38 of bin/genext3.sh as follows:
  old: echo y | mkfs.ext3 $@ -L arm 
  new: mkfs.ext3 -F -L arm $@

********************************************************************************
Linux Image V2.0 Alpha 0 (December 27, 2012)
(ported form the Linux Image V2.0 Beta1 for Colibri T20)
- U-Boot:
  - first release
- Linux kernel:
  - first release
- oe-core:
  - first release
- sources git.toradex.com tag T30_LinuxImageV2.0Alpha0_20121227

Known Issues:
- We are in an early Alpha state, not all functions are tested.
- If a a monitor is connected to DVI, the kernel sometime hangs when the 
  display controller DC1 is initialised. -> reboot required. 
- When no device was attached to the USB host port during boot, the 
  system crashes when one is attached when the system is up.
- LVDS aka TFTLCD resolution hard-coded in kernel to VESA VGA resolution, 
  comments with timings for other resolutions provided
- some windows have garbled titlebar, e.g. lxterminal
- lxappearance is segfaulting upon start

********************************************************************************
Notes:
- 115200 baud serial debug console on UARTA aka FFUART (lower X25 on EvalBoards
    resp. X27 on V3.1a depending on JP17/19, X13 on Iris) without any handshake
- user account: root with empty password
- eMMC: partition 1: vfat with kernel, partition 2 ext3 root file system
- opkg package manager
- HDMI aka DVI-D: not all pixel clock frequencies allow for HDMI audio
- CRT: the T30 internal video DAC output is unsupported by NVIDIA's L4T Linux
    SW stack
- Linux host used for update preparation requires proper 32-bit execution
    environment (e.g. install ia32-libs on 64-bit Ubuntu), awk and libusb
    (e.g. install gawk and libusb-1.0-0 on Ubuntu)

Working on latest image:
- U-Boot boot loader
  - environment storage in eMMC
  - Ethernet
  - MMC/SD cards
  - eMMC flash
  - serial console debug UARTA
  - Toradex Colibri configuration block handling
  - USB storage as host on USB host port
  - USB device firmware upgrade (DFU) and USB mass storage (UMS) as device on USB OTG port
  - TFTLCD framebuffer support
- Linux kernel
  - GPIOlib /sys/class/gpio
  - temperature sensor /sys/bus/i2c/devices/4-004c
  - RTC (Tegra internal, PMIC and board level I2C RTC)
  - Ethernet eth0
  - eMMC ext3
  - serial console debug UARTA ttyS0
  - high speed serial UARTB and UARTD ttyHSX
  - I2C via /dev/i2c-X
  - MMC/SD card, optional 8-bit SDHCI
  - PWM LEDs /sys/class/leds/
  - HDMI HDA audio
  - analogue audio capture, playback and resistive touch
    - audio noise is high, workaround is to set headphone volume to maximum and use the DAC volume
    - touch has some jitter
  - SPI via /dev/spidev0.0
  - GMI with multiplexed nPWE and RDnWR
  - framebuffer console
  - custom Ethernet MAC address
  - serial number and board revision
  - watchdog
  - USB host port
  - USB audio driver
  - USB webcam
  - USB raw HID device /dev/hidrawX
  - USB device Ethernet RNDIS, provided by Android gadget
  - automatic USB device/host detection aka OTG support
  - analogue inputs
  - suspend LP1
  - DVFS power management
  - optional parallel camera interface
- Linux user-space
  - graphics (LVDS-1 aka TFTLCD and HDMI-1 aka DVI-D)
  - tegrastats
  - Firefox browser
  - Gstreamer video encode and playback, independent dual full HD video decode
  - GPIO config tool
  - LXDE
  - tegrastats-gtk, CPU information visible in graphical environment

Not working or not tested:
- U-Boot USB keyboard
- Linux kernel
  - IrDA
  - RS-422/485
- Adobe Flash not provided by L4T (and probably never will)

******************************************************************************
Flashing instruction have been moved to the Toradex developer article:
http://developer.toradex.com/knowledge-base/flashing-linux-on-tegra-modules

Toradex, December 17, 2015