Randomly on my laptop screen this appears and debian just freezes. Sometimes these vertical lines don’t appear and system freezes anyway. Its just random. How do i identify if this is hardware or software issue? and then how to identify exact piece of hardware or software causing this problem.
yeah, entire machine locks up. Yeah have tried ssh’ing from mobile and it was stuck one time when i did that during a freeze. have replugged RAM let’s see if system freezes again,
May just be bad RAM as well on a 12 year old machine. Should be cheapish to replace. Try running a memtest