Bug In Unknown Package

[Cole Creps <pyrolizard11@gmail.com>]

Hello, I recently upgraded to Debian Buster and now experience severe 
graphical lag(10-15FPS on a blank desktop, less with a window open 
according to KDE's built in FPS monitor) after resuming from suspend.  
Reportbug said to contact this address because I don't know which 
package is causing the problem - how would I go about finding that out?