Randomly freezes on boot

[quirinovix]

Sometimes my Ubuntu does not boot. After boot menu (Ubuntu is default, W10 another option, 10 sec to choose) it freezes. Alt+sysrq, ctrl+alt+del, ctrl+alt+Fx, nothing works. It also does not respond ping. So i have to hard reset. Following boot, the boot menu gives me 30 sec instead of default 10 sec. During boot, it shows


/dev/sda3: recovering journal
/dev/sda3: clean xxx/xxxx files, xxx/xxx blocks


and everything goes fine. When it happens, no syslog is written.


Ubuntu 18.04.3, 64 bit CPU. I thought it could be the SSD. So i bought a new and bigger one. But got the same error. Fresh install. I do not got the error every time. It's completely random.


Any ideas?

[Skaperen]

there is no other text than those 2 lines? not even temporarily?

do you get those 2 lines every time it freezes or just when it comes up?

how much time do you give it to come up?

[quirinovix]

Thank you for your reply.
There is all the stuff during a normal boot. The only difference i can notice are this 2 lines. But i will get all the messages next time it freezes. I'm using the PC very often.