I am having a problem in Lazarus 1.4.2 under x86_64-linux Kubuntu. After working in a project for several days the m key on my keyboard stopped printing the letter 'm' in the editor. Instead it creates a CR LF operation. I tried the usual things, re-booting, re-opening, etc. I checked that the m key performed normally in jEdit, libre office, Konsole, etc.
I uninstalled lazarus, did a fresh compile of source code and re-installed. Initially, the m key worked fine for a couple of hours, then the same thing. I tried deleting my project file and created a new one with no effect. I went though the options for Lazarus and the project to see if a different combination of options would clear the problem, but no luck.
I checked the properties of my various code files and found nothing amiss. I looked at system settings and even changed the keyboard settings from generic to the specific make and model for my HP keyboard.
I don't know what else to do. I hope someone else has some ideas.