Hi Michal, On 07.08.24 08:38 Michal Suchánek wrote:
probably something generates a key event, either on a keyboard or there is a noise on serial port if you have one. If it hangs reliably the noise should be quite frequent, and you should see it with evtest or reading the serial port(s).
Grub can probably be configured to not boot automatically as well. Make sure the grub.cfg as well as the environment is really identical between the machines.
Grub booted automatically on this machine until Sunday or so, without me changes anything. So either something surfaced that was there for a long time, or some update changed something. But a hardware issue that only affects one machine is more likely in this case, I'll check that. Kind Regards, Johannes