Laptop stalls after 15-20 minutes

Hello. My Toshiba Satellite C655-S5307 (Intel Core i3) freezes up after being on for 15-20 minutes at which time I have to do a hard shutdown. Have not had system monitor open at the time to see what is happening. Is there a log or some way to find out what is causing the freeze-up? The fan starts to rev and then the mouse pointer stops responding.

Thank you.

Update: just ran it for 30 minutes and it was fine. Not sure what is happening.

You can get he log for the last boot with:
journalctl -b-1 -p4 --no-pager

Also post the output of:
inxi -Fazy

Considering your laptop uses Mobile Intel ® HD graphics with 64MB-1696MB dynamically allocated
shared graphics memory I guess you probably running out of memory if you running anything graphics heavy on the model with 4GB ram. If there’s no swap it will crash for sure.


High GPU usages → it gets hot → it cannot keep up → freeze.

journalctl --boot=-1
journalctl --boot=-1 --dmesg --grep="i915|radeon|amdgpu|nvidia|nouveau"

Gentle shut down a suddenly hanged PC to minimize a chance of getting a broken filesystem and data loss:

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