it is looping this:
nanosleep({0, 50000000}, NULL) = 0
lseek(3, 87, SEEK_SET) = 87
read(3, " ", 1) = 1
lseek(3, 88, SEEK_SET) = 88
read(3, "\0", 1) = 1
lseek(3, 94, SEEK_SET) = 94
read(3, "\247", 1) = 1
lseek(3, 96, SEEK_SET) = 96
read(3, "\215", 1) = 1
--
screensaver doesn't activate
https://launchpad.net/bugs/37555