I have the Lenovo R61 Thinkpad with Ubuntu 18.04. It has 4GB memory, Samsung SSD 860 EVO 500GB with 9GBs swap partition, Corexe2x84xa22 Duo CPU T7500 @ 2.20GHz xc3x97 2 and Intelxc2xae 965GM (CL) graphics.
Soon after I starts using memory heavy software like GIMP or Google Map for a while, all of sudden, the swapping begins and it freezes up with the hardware led light continuously flickering. The clock sometimes does not advance for more than 20 to 30 minutes, and sometimes it crashes with the blank screen and restarts by itself. I do not think it uses up all 9GB swap space.
I tried to solve this myself by researching, but so far all the suggestions on the web failed. Previous, it had the Kingston SSD, and I learned that it has a firmware problem with Linux, so I changed to Samsung SSD. But still the freeze problem persists.
Is this normal because of my old hardware or faulty hardware? Or is my software configuration or setting not correct? Where can I start looking further?
Thank you very much.