Hallo, ich habe das merkwürdige Problem, dass auf meinem kleinen Server mit Mainboard Fujitsu D3400-B alle linux kernel 5.3 nach einigen Stunden einfrieren. Das Journal zeigt für mich nichts : Sep 17 04:24:05 linux postfix/smtpd[6350]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:24:05 linux postfix/smtpd[7070]: lost connection after CONNECT from unknown[unknown] Sep 17 04:24:05 linux postfix/smtpd[7070]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:24:05 linux kernel: rx_data returned -104, expecting 48. Sep 17 04:24:05 linux kernel: iSCSI Login negotiation failed. Sep 17 04:24:05 linux kernel: nfsd: peername failed (err 107)! Sep 17 04:25:01 linux CRON[8825]: (root) CMD ( /usr/local/bin/update-rrds.sh >/dev/null) Sep 17 04:25:05 linux postfix/smtpd[6350]: connect from unknown[unknown] Sep 17 04:25:05 linux kernel: nfsd: peername failed (err 107)! Sep 17 04:25:05 linux postfix/smtpd[7070]: connect from unknown[unknown] Sep 17 04:25:05 linux postfix/smtpd[7070]: lost connection after CONNECT from unknown[unknown] Sep 17 04:25:05 linux postfix/smtpd[7070]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:25:05 linux postfix/smtpd[7070]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:25:05 linux postfix/smtpd[6350]: lost connection after CONNECT from unknown[unknown] Sep 17 04:25:05 linux postfix/smtpd[6350]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:25:05 linux kernel: rx_data returned -104, expecting 48. Sep 17 04:25:05 linux kernel: iSCSI Login negotiation failed. Sep 17 04:26:06 linux postfix/smtpd[6350]: connect from unknown[unknown] Sep 17 04:26:06 linux postfix/smtpd[7070]: connect from unknown[unknown] Sep 17 04:26:06 linux postfix/smtpd[7070]: lost connection after CONNECT from unknown[unknown] Sep 17 04:26:06 linux postfix/smtpd[7070]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:26:06 linux postfix/smtpd[6350]: lost connection after CONNECT from unknown[unknown] Sep 17 04:26:06 linux postfix/smtpd[6350]: disconnect from unknown[unknown] commands=0/0 Sep 17 04:26:06 linux kernel: nfsd: peername failed (err 107)! Sep 17 04:26:06 linux kernel: rx_data returned -104, expecting 48. Sep 17 04:26:06 linux kernel: iSCSI Login negotiation failed. -- Reboot -- Ein alter Kernel 4.4.79-18.26-default funktioniert problemlos. Was kann ich tun, um das Problem zu identifizieren. Im Moment habe ich den alten Kernel fest eingestellt, und die neuen werden nicht benutzt. Vielen Dank für Hilfe, K. Müller