I was finally able to test this with the mainline kernel: 6.1.10-060110-generic #202302060840
taken from: https://kernel.ubuntu.com/~kernel- ppa/mainline/v6.1.10/amd64/linux-image- unsigned-6.1.10-060110-generic_6.1.10-060110.202302060840_amd64.deb and it works! this is specific about hot swap. i suspect the following commits are missing from the HWE kernel in 18.04. to make this work: 2baa85d6927d11b8d946da2e4ad00dddca5b8da2 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2baa85d6927d11b8d946da2e4ad00dddca5b8da2) and 85ae3970a0e393cbb07ec30ac99d82cfd6c3f922 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=85ae3970a0e393cbb07ec30ac99d82cfd6c3f922) -- 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/1998224 Title: pcie hotplug not working in linux-generic-hwe-18.04 5.4.0.135.152~18 Status in linux package in Ubuntu: Confirmed Bug description: situation: ubuntu 18.04 server install on a supermicro x64 host. hot plug NVME ssd into NVME U.2 HotSwap Slot. problem: hot plug does not work/ nvme is not recognised. how to test: echo 1 > /sys/bus/pci/rescan dmesg output: [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.1: bridge window [io 0x1000-0x0fff] to [bus 41] add_size 1000 [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.2: bridge window [io 0x1000-0x0fff] to [bus 42] add_size 1000 [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.1: BAR 13: no space for [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.1: BAR 13: failed to assign [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.2: BAR 13: no space for [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.2: BAR 13: failed to assign [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.2: BAR 13: no space for [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.2: BAR 13: failed to assign [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.1: BAR 13: no space for [io size 0x1000] [Mon Nov 28 15:46:33 2022] pcieport 0000:40:01.1: BAR 13: failed to assign [io size 0x1000] Kernel Version: 5.4.0-107-generic #121~18.04.1-Ubuntu SMP Thu Mar 24 17:21:33 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux hardware information: tried with micron and intel NVME, e.g: INTEL SSDPE2KE016T8 after a reboot, the NVME is recognized, so there is no hardware problem. if you need additional debug information, feel free to ask. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1998224/+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
