I just now got a chance to try this. Sadly it did not work -- same behavior as described in the first post. Any ideas?

OK, I'll try that tonight. Normally I'm running this from an icon in the GUI. So for this test, I'll open a terminal window, set the variable (do I need to export it?) then run DOSBox from the command line. Right? Will that environment variable be SDL_DISABLE_LOCK_KEYS or sdl_disable_lock_keys?

That's interesting, thanks rfnagel. I have DOSBox 0.73 and have confirmed that the system has SDL 1.2.14 . Can someone else comment how the above solution might work in a Linux system?

Hi all - I have a new Ubuntu 10.04 LTS Linux system that is running DOSBox 0.73 (the latest version approved for 10.04). Happily DOSBox runs my one DOS app just fine, except I've found that NumLock doesn't work right. In fact, it exhibits the problem even at a simple DOS prompt, so it's not the app. …