I need to do 10 damage but doesn't show how many damage I'm doing.
Yup ... if your damage is "not enough" it dont show you what damage you did, bcs it was "absorbed" and therefore you effectively did none. :-/
(I think that boosted barbarian is able to do more than 10 damage but let's assume it is not a bug)
Depends ...
The wall is also resistant to many types of damage (you can find yout if you examine it) ...
If you are using Greatsword, wich is Slashing damage ... on iwich i believe its almost certainly resistant.
You do 2d6 + Str ... so even if your Barbarian have 18 Str (since Ethel Hair is not working right now, so im affraid 20 is impossible) ...
That means you can give 12+4 = 16 damage at best ... but since the wall is resistant, your damage is then divided by 2 ... meaning 8 ... wich is not enough.
But if you only switch your weapon to Torch (yeah a bit silly, but it works)
Your damage will be 1d4+Str ... (not sure if it is resistant to Fire, so i ignore that part ... lets say your torch isnt lighted
)
Meaning 4+4=8 at best ... but since the wall is vulneable, your damage is then multiplied with 2 ... meaning 16 ... wich is more than enough.
So yeah, silly as it seems, torch is
twice as effective in tearing wall down than greatsword.
(Even more actualy ... since Greatsword will never do any damage to that wall ... but im too lazy to count chances so late. :-/ )