According to AHCI spec v1.3.1, "7.3 Native Hot Plug Support", once LPM is enabled the hotplug needs to be disabled.
So I agree with 2), I think we should write document and let users know how to change the LPM for hotplugging detection. For 3) I don't think we need to change the way it works, because there can be lots of corner cases to cover, and not all servers need AHCI hotplug feature. We just need a good documentation to instruct users how to disable it. 4) is kicking the can down the road, the same issue will re-appear once those servers get upgraded. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1971576 Title: SATA device hot plug regression on AMD EPYC (Asus) server Status in linux package in Ubuntu: Confirmed Bug description: SATA disk hot plug can't work on Ubuntu 20.04 ga-kernel of "Linux version 5.4.0-109-generic", but it works on earlier version of " Linux version 5.4.0-42-generic" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1971576/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
