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Subscribe to BugBase Y.T. hangs at "booting the kernel"  8 posts, 5 voices , Tagged: bugbase boot

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Mar 26, 2011 8:17am
User_img_not_found_02_med brian.roma... 2 posts

I have a BUGbase that boots up to the point where it says booting the kernel and then hangs.  Reading through past posts I am guessing that I have an SD card partition or format problem, but I am not sure what is wrong. 

When I run fdisk -l on my host system (fdisk 2.17.2 on Ubuntu), I get the following details for my SD card:

Disk /dev/sdb: 1977 MB, 1977614336 bytes
        62 heads, 61 sectors/track, 1021 cylinders
        Units = cylinders of 3782 * 512 = 1936384 bytes
        Sector size (logical/physical): 512 bytes / 512 bytes
        I/O size (minimum/optimal): 512 bytes / 512 bytes
        Disk identifier: 0x00000000
        Device     Boot Start End   Blocks   Id System
        /dev/sdb1  *    1     1021  1930680+ 83 Linux

I have loaded the filesystem image from “Angstrom-bug-image-production-glibc-ipk-2009.X-stable-bug20.rootfs.ext3”, verified it using e2fsck, resized using resize2fs, re-verified with e2fsck.  I can mount and view the partition and everything looks fine. 

Below is the full terminal session from my boot sequence.  Once it gets to booting the kernel it just hangs.  Any suggestions?

Texas Instruments X-Loader 1.42
        Starting OS Bootloader…
        U-Boot 2010.06-00708-g7c5d5cf (Oct 06 2010 – 09:59:24)
        OMAP3530-GP ES3.1, CPU-OPP2 L3-165MHz
        OMAP3 BUGBase 2.0 board + LPDDR/NAND
        I2C: ready
        DRAM: 256 MiB
        NAND: 256 MiB
        In: serial
        Out: serial
        Err: serial
        Die ID #349200040000000004037b700d01400c
        Net: No ethernet found.
        Hit any key to stop autoboot: 0
        mmc1 is available
        Loading file ”/boot/uImage” from mmc device 0:1 (xxa1)
        2681580 bytes read
        ## Booting kernel from Legacy Image at 80000000 …
        Image Name: Angstrom/2.6.31/bug20
        Image Type: ARM Linux Kernel Image (uncompressed)
        Data Size: 2681516 Bytes = 2.6 MiB
        Load Address: 80008000
        Entry Point: 80008000
        Verifying Checksum … OK
        Loading Kernel Image … OK
        Starting kernel 
        Uncompressing Linux..........................................................
        ....................................... done, booting the kernel.


Mar 27, 2011 5:45pm
Medium Bug Labs team jconnolly 285 posts

I’m betting that this is related to the machid variable that needs to be set in uboot.  For more info, see the README here: 


Mar 29, 2011 1:50am
User_img_not_found_02_med brian.roma... 2 posts

Yup, that fixed it.  Thanks!

I suppose this is a relatively rare problem, but it would be nice if Bug could publish a table showing which boot loader versions work with which filesystem images.  I thought that my bootloader was “new enough” that it would just work with the latest filesystem image. 


Mar 29, 2011 6:31pm
Medium Bug Labs team jconnolly 285 posts

Yeah this is really the only case in which your bootloader environment variables will impact your ability to boot.  In the future, with a planned next revision to the bugbase, that bootloader will be incompatible with BUG2.0, and bears documentation.  I’ll kick off a wiki soon and reply to this thread.

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