Commandblock given with datavalue different than 0 has no texture

do /give @p minecraft:command_block 1 1
Thisone does not give a texture.
Remove the no texture command block from your inventory (you have to do this because even when the commandblock has a damage value, it still stacks when using /give with a 0 damage value) and do /give @p minecraft;command_block 1 0, thisone has a texture.