I had Firefox running on a Parted Magic LiveCD, then (possibly) as a result of a key combination I don't recall, it quickly vanished from screen and Task Bar/Window List.
ps ax | grep firefoxreturns the below (and the unneeded
grep firefoxline). Both
psand the GUI Task Manager, show firefox with seemingly unchanging RSS, VM-SIZE and 0% CPU usage.
johndoe 1916 36.6 14.0 923772 504372 tty1 Sl 13:30 12:15 firefox
pstree | grep firefoxreturns:
strace -p 1916returns, and seemingly stays on this line forever:
futex(0xac975608), FUTEX_WAIT_PRIVATE, 1, NULL
I understand from an answer to What do the STAT column values in ps mean? that
Sl) indicates that the process is in an
interruptible sleep state.
Can anyone elaborate as to what the state is, in more detail?
I will start a new question, with more specifics on my distro, to address the original 2nd question.