I had an IdeaPad S145 of lenovo with Windows. For last 2 years I am using OS ubuntu boot. Now the computer volume partition didn't have enough memory to install more packages, so I tried to accommodate the other volume partition by resizing the memory, And I successfully changed a volume partition. (but not changed computer volume till now and left memory was 0 bytes) By accident I restarted my computer. After that, I try to power on and off many times but still get black screen and 2 lines error before black screen.
""8.5395821 integrity: Problem loading X.509 certificate -65 /dev/sda?: recovering journal
/dev/sda?: clean, 311252/1525920 files, 5807083/6103552 block""
Please help me, what should i do?