> I have a xen guest that hangs after a while if running 4.9 kernel > (since upgrade to stretch)
You might try the 4.9.110-3 kernel from stretch-proposed-updates, which I noticed is required to fix a reboot-loop on stretch: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903767 That doesn't seem to match your situation 100% as you do seem to gain access, albeit briefly, but it might be worth a go. > When running on jessie's 3.16 kernel, the guest is running fine. > I have other VMs on this host running 4.9 kernel without problem. It is interesting that not all guests fail .. Steve -- https://steve.fi/