Prithwiraj Shome

i.MX53 QSB Boots up with Ubuntu Demo Image but there is no VGA output!--HELP HELP HELP

Discussion created by Prithwiraj Shome on Jun 29, 2011
Latest reply on May 3, 2012 by Vincent Chou



I am new to QSB and Linux.


As per the user guide, i did flash the SD card with U-Boot.bin and uImage in the first 4 MB. Then created Ext3 partition for the root file system and uncompressed the root FS in that partition.


For U-Boot.bin:

sudo dd if=u-boot-mx53-loco.bin of=/dev/sde bs=512 && sync && sync


For Kernel Image:

sudo dd if=uImage of=/dev/sde bs=512 seek=2048 && sync && sync


For root FS:

1. sudo fdisk /dev/sde



u (to change from cylinder to sector)



2. sudo mkfs.ext3 /dev/sde1

3. sudo mount /dev/sde1 /home/mount1 (mount point)

4. cd /home/mount1

5. sudo tar --numeric-owner -xjvf /<path>/rootfs.tar.bz2

6. sudo umount /home/mount1


Boot Environment Variables are set as follows:

setenv bootfile 'dexter/uImage'


setenv filesize '2D47BC'


setenv fileaddr '70800000'


setenv bootcmd_mmc 'run bootargs_base bootargs_mmc; mmc read 0 ${loadaddr} 0x800 0x1800; bootm'


setenv lvds 'video=mxcdi0fb:RGB666,XGA ldb'


setenv bootcmd_obds 'ext2load mmc 0:1 0x70800000 /unit_tests/obds.bin; go 70800000'


setenv lcd 'video=mxcdi0fb:RGB24,SEIKO-WVGA'


setenv vga 'video=mxcdi1fb:GBR24,XGA di1_primary tve'


setenv hdmi 'video =mxcdi0fb:RGB24,1024x768M@60'


setenv bootcmd 'run bootcmd_mmc'


setenv bootargs_mmc 'set bootargs ${bootargs} root=/dev/mmcblk0p1 rw rootwait'


setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 ${vga}'


The system comes up and i am able to login successfully with "lucid" as both login id and password BUT VGA output is not present.


The UART log is as attached below. PLEASE HELP.