Dear all, (please Cc)
I am seeing hard lockups with 5.9-rc2 and -rc3, while 5.8.N (1,2,3,4,5) work without any problems. THe lockups are hard to debug, since not even Sysrq works anymore. The screen freezes completely, no reaction. Ports are also dead, ssh into the machine is not possible. Hangs are repeatable, but not triggerable (at least I didn't find a way). Last time I left the screen locked and went shopping to find it locked up coming back. In total I got about 10 lock ups. This is an Intel CPU with AMD 5700xt GPU, running Debian/unstable. My feeling is somehow GPU related, but that might be a wide grasp. Any suggestions how to debug this? The kernel logs after reboot are empty. Best Norbert -- PREINING Norbert https://www.preining.info Accelia Inc. + IFMGA ProGuide + TU Wien + JAIST + TeX Live + Debian Dev GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13