Here is what we know so far,
Disco Kernel 5.0.0-38 , reboots just fine on S390x Zvm and KVM.
This appears to only affect the lpar.
The Lpar reboots just fine if we boot the previous cycles kernel and
issue a "$sudo reboot" from the command lines.
Looking at the commits for disco, it could be one of these causing this.
b3ff8122bafa s390/idle: fix cpu idle time calculation
98f8642e75cd s390/cmm: fix information leak in cmm_timeout_handler()
72006d0879eb s390/uaccess: avoid (false positive) compiler warnings
fced71a08bdf s390/mm: fix -Wunused-but-set-variable warnings
Will try to isolate and see if reverting these makes any difference in
behavior.
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Sean Feole (sfeole)
** Changed in: linux (Ubuntu)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1855237
Title:
Unable to reboot Disco on Ubuntu LPAR s390x (5.0.0-38)
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