Thanks. I was able to resolve the issue. I looked into KWin System Settings as suggested.
A feature in the latest version of KDE Plasma is to blame. System Settings> Application Style> Fine Tuning> Menubar style> In Application resolves it. Regards Karthik Tayur On 9 July 2017 at 20:52, John Coppens <j...@jcoppens.com> wrote: > On Sun, 9 Jul 2017 12:24:32 +0530 > Karthik Tayur <karthiksta...@gmail.com> wrote: > > > The menu bar has disappeared on LyX. I am using Arch Linux. I haven't > > observed this happening on any of my other applications. My system is up > to > > date. Any idea as to what might have gone wrong? > > If you're using Unity: > > Older versions of unity 'grabbed' the menu bar of the active program > and displayed it at the top of the screen (not window), but only if the > cursor is there. Try moving the cursor to the top of the screen. I > remember having to delete (or rename) an executable to restore 'normal' > behaviour. > > Newer versions seem to have another system, which is configurable in a > more practical way, and allow to auto-hide the menu. I believe this is > a property of the window manager - not of LyX. > > John >