I changed the video-mode in u-boot prompt (unfortunately to a wrong resolution). that was in order to use hdmi.
now i am getting an ennoying unsupported resolution error, and i am unable to get back the u-boot command promt to change it to a good value.
Any one can help ? thank
btw, usual esc at boot doesn't work
i am using the twr-ls1021A board
You could erase the uboot_env, using for example CodeWarrior for ARMv7. When uboot_env is erased, uboot will recreate a default env and this may be helpful in your case.