I tripped across a situation where one of my Qt5 applications that used a periodic QTimer stops receiving timeout signals after 1 hour 10 minutes of normal operation.

(This is in Genode 18.08, x86_32 and x86_64, nova and seL4.)

The same application keeps on ticking (for many hours at least) when compiled and run under Linux.

A Qt Forum participant speculates "a 2^32 wraparound? Because 4294967296 (2^32) microseconds is 4295 seconds." This is just about the observed time.

The Qt5 documentation suggests that some Qt timers on some platforms can have this problem--it depends on the underlying clock source.

Can anyone comment on the relevant clock source for QTimer in the Genode port?

For reference, a native Genode Timer connection does not exhibit this problem, so using it in this application was a viable workaround.

// Steve