boot - Unable to get to desktop on Ubuntu 16.04 LTS - Ask Ubuntu


i running ubuntu 16.04 couple of months without problems. however, since 2 days ago got message on start saying system program problem detected. have had same message on laptop, running 14.04, quite long time without issues, ignored it.

now, however, 16.04 installation cannot login anymore. login screen, enter account credentials, , after familiar system program problem detected message can not see else of (unity) desktop. after 2 seconds, screen goes black , after again presented login screen. can repeat cycle indefinitely.

any suggestions on how fix this? tried booting in recovery mode no avail.


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