On 4/8/23 19:55, Luna Celeste wrote: Sounds very annoying Couple of thoughts: - does the system journal reveal anything? If not it seems less like a kernel crash and more like graphics type hangs - good to avoid any nvidia drivers. Not just kernel but 'other processes' - journal --since -1h or whatever. - Can you keep a remote ssh from another computer - and when hang occurs is the remote ssh also dead or just the console/monitor keyboard? - Definitely worth checking memtest86+ as well as smarctl test your disk(s). While bad mem is possible your symptoms dont seem quite consistent with that - i'd check anyway. - is your CPU AMD? Can you turn off sleep and see if it makes a difference - there were some issues with s2idle and AMD, though I thought the were worked around/fixed back in 6.1. Also is your bios fully up to date?