Wireless mouse delay - sleep issue / waking up?

No idea if this is the mouse itself or LMDE or the computer hardware so this is a deep warren - but basically there's a second or two delay between using the mouse and it doing stuff if it hasn't been used for X time.

No files or tests are mentioned. Start by reproducing the delayed mouse response after it has been idle, then isolate whether the cause is the mouse, LMDE, or computer hardware; done requires a confirmed cause and a documented next step.

Written by the indexing model from the issue text.