Hi, booting a bare metal machine with kernel 5.0.21, partitioning the nvme disk with: /boot/EFI with vfat / with ext4 /var/lib with ext4 and writing a ubuntu image onto that layout works. Booting with 5.1.18 or 5.2.1 with the same static (no modules) kernel configuration always fails with: [ 132.236757] nvme nvme0: I/O 323 QID 10 timeout, aborting [ 132.242091] nvme nvme0: I/O 324 QID 10 timeout, aborting [ 132.247414] nvme nvme0: Abort status: 0x0 [ 132.251437] nvme nvme0: I/O 325 QID 10 timeout, aborting [ 132.256752] nvme nvme0: I/O 326 QID 10 timeout, aborting [ 132.262074] nvme nvme0: I/O 327 QID 10 timeout, aborting [ 132.267392] nvme nvme0: I/O 328 QID 10 timeout, aborting [ 132.272707] nvme nvme0: I/O 329 QID 10 timeout, aborting [ 132.278027] nvme nvme0: I/O 330 QID 10 timeout, aborting [ 132.283340] nvme nvme0: I/O 331 QID 10 timeout, aborting [ 132.288674] nvme nvme0: Abort status: 0x0 [ 132.292690] nvme nvme0: Abort status: 0x0 [ 132.296701] nvme nvme0: Abort status: 0x0 [ 132.300714] nvme nvme0: Abort status: 0x0 [ 132.304727] nvme nvme0: Abort status: 0x0 [ 132.308741] nvme nvme0: Abort status: 0x0 [ 132.312753] nvme nvme0: Abort status: 0x0 [ 132.316769] nvme nvme0: Abort status: 0x0 ..... [ 310.716746] nvme nvme0: Device not ready; aborting reset [ 310.722068] nvme nvme0: Removing after probe failure status: -19 [ 310.734040] Buffer I/O error on dev nvme0n1, logical block 4, async page read [ 310.734044] print_req_error: I/O error, dev nvme0n1, sector 2049 flags 0 [ 310.734050] print_req_error: I/O error, dev nvme0n1, sector 5139312 flags 801 [ 310.734119] Aborting journal on device nvme0n1p2-8. [ 310.734132] Buffer I/O error on dev nvme0n1p2, logical block 557056, lost sync page write [ 310.734135] JBD2: Error -5 detected when updating journal superblock for nvme0n1p2-8. [ 310.775898] print_req_error: I/O error, dev nvme0n1, sector 3567 flags 100001 [ 310.775909] FAT-fs (nvme0n1p1): bread failed in fat_clusters_flush [ 310.783036] Buffer I/O error on dev nvme0n1p1, logical block 1519, lost async page write [ 310.783038] print_req_error: I/O error, dev nvme0n1, sector 3566 flags 100001 [ 310.783039] Buffer I/O error on dev nvme0n1p1, logical block 1518, lost async page write [ 310.783040] print_req_error: I/O error, dev nvme0n1, sector 3565 flags 100001 [ 310.783040] Buffer I/O error on dev nvme0n1p1, logical block 1517, lost async page write [ 310.783041] print_req_error: I/O error, dev nvme0n1, sector 3564 flags 100001 [ 310.783042] Buffer I/O error on dev nvme0n1p1, logical block 1516, lost async page write [ 310.783045] print_req_error: I/O error, dev nvme0n1, sector 3563 flags 100001 [ 310.789253] Buffer I/O error on dev nvme0n1p2, logical block 1, lost async page write [ 310.797310] Buffer I/O error on dev nvme0n1p1, logical block 1515, lost async page write [ 310.797311] print_req_error: I/O error, dev nvme0n1, sector 3562 flags 100001 [ 310.797313] Buffer I/O error on dev nvme0n1p1, logical block 1514, lost async page write [ 310.804451] Buffer I/O error on dev nvme0n1p2, logical block 594, lost async page write [ 310.812535] print_req_error: I/O error, dev nvme0n1, sector 3561 flags 100001 [ 310.812535] print_req_error: I/O error, dev nvme0n1, sector 3561 flags 100001 [ 310.896373] print_req_error: I/O error, dev nvme0n1, sector 3303 flags 100001 [ 310.903626] Aborting journal on device nvme0n1p3-8. [ 310.908527] JBD2: Error -5 detected when updating journal superblock for nvme0n1p3-8. [ 311.094887] FAT-fs (nvme0n1p1): unable to read inode block for updating (i_pos 19713) [ 311.102729] FAT-fs (nvme0n1p1): unable to read inode block for updating (i_pos 19843) [ 311.110557] FAT-fs (nvme0n1p1): unable to read inode block for updating (i_pos 19844) No Idea where to start digging, any help welcome. regards -- Stefan Majer