[K12OSN] Thin clients freezing?

[David Hopkins]

This morning all of the users' sessions are freezing after 3-5 minutes of
use. The mouse  'moves', but the keyboard is unresponsive, and you can't
click on anything at all.  Given that nothing has been patched or upgraded,
it is very confusing as since this just started yesterday.  Rebooting the
thin client and you can log back in, but then 3-5 minutes later, everything
hangs again. Is it some sort of X-server issue?
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