I have recently played through TNT with Brutal Doom v20b without any problems. Now Brutal Doom freezes after Plutonia map 6 Baron's Lair, right before the intermission screen. When I load map 7 with idclev, the game works correctly. I went back to TNT and tested level 6, now the game freezes after completing that level too.
I am not sure what is causing this change in behaviour. I have not updated Brutal Doom itself. GZDoom itself might have been updated by Ubuntu, but intermission screens work correctly without Brutal Doom. I am currently running GZDoom version 3.2.5 on Linux. nVidia drivers have recently been upgraded. Perhaps this is the root cause of the problem?
Any ideas how to fix the problem? Is it possible to to somehow disable intermission screens?