〜だけで and 〜でだけ

Found that this nuance is quite interesting and would like to make a note of it.

話し合いだけでこの問題を解決できる。
This problem can be solved just by discussion.

This implies the problem can be solved other ways, but we can simply do it with discussion alone.

話し合いでだけこの問題を解決できる。
It is only by means of discussion that this problem can be solved.

This implies that solving the problem in other ways is meaningless.

だけで is used more commonly as でだけ has a strong exclusivity which people may use when they want to put the emphasis on ONLY BY DOING….