Sharing in case this helps others. Also posted to arch forum: https://bbs.archlinux.org/viewtopic.php?id=288095 There is a bug with the rtsx driver in 6.4.11 that prevented 1 machine from booting. It presented in my case as NVME failure, thus preventing machine from booting. 6.4.10 is fine. The hardware that triggers this is in my case is: 03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01) Solution: A work around is simply to blacklist the driver (its only a card reader). i.e. Add blacklist rtsx_pci blacklist rtsx_pci_sdmmc to /etc/modprobe.d/blacklist_rtsx.conf rebuild the initramfs so that the blacklist gets put into it. More details on this are available on lkml: https://lkml.org/lkml/2023/8/16/1183 regards gene