** Description changed: When creating an r5.metal instance on AWS, the default kernel is bionic/linux-aws-5.4(5.4.0-1056-aws), when changing to bionic/linux- aws(4.15.0-1113-aws) the machine fails to boot 4.15 kernel. + + If I remove these patches the instance correctly boots the 4.15 kernel + + https://lists.ubuntu.com/archives/kernel-team/2021-September/123963.html + + But after successfully updating to the 4.15 without those patches + applied, I can then upgrade to a test kernel with the above patches + included, and the instance will boot properly. + + This problem only appears on metal instances, which uses NVME instead of + XVDA devices. + + AWS instances also use the 'discard' mount option with ext4, thought + maybe there could be a race condition between ext4 discard and journal + flush. Removed 'discard' mount and rebooted 5.4 kernel prior to 4.15 + kernel installation, but still wouldn't boot.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946149 Title: Bionic/linux-aws Boot failure downgrading from Bionic/linux-aws-5.4 on r5.metal To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/1946149/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
