Hello, I am trying to update SBL using the method shown in the documentation https://slimbootloader.github.io/security/firmware-update.html but I get the following error: =================Read Capsule Image============== BootMediumPciBase(0xE00A8000) Init USB XHCI - Success XHCI: Don't support multi-TT feature for Hub now. (force to disable MTT) XhcPeiCheckUrbResult: STALL_ERROR! Completecode = 6 XhcPeiControlTransfer: error - Device Error, transfer - 2 XhcPeiCheckUrbResult: STALL_ERROR! Completecode = 6 XhcPeiControlTransfer: error - Device Error, transfer - 2 Enumerate Bus - Success Found 7 USB devices on bus Found mass storage on device 0 find boot partition Partition type: MBR (1 logical partitions) Find partion success Find partition Detected FAT on HwDev 0 Part 0 Capsule Image found, ImageSize=0x22128C First 256Bytes of capsule image 00000000: 58 AE 3E 1A 80 B5 EF 4F-AC A3 A1 6D 9E 00 DF 5F *X.>....O...m..._* 00000010: 40 00 00 00 01 00 00 00-00 00 00 00 80 11 22 00 *@.............".* 00000020: 0C 01 00 00 40 00 00 00-38 10 22 00 78 10 22 00 *....@...8.".x.".* 00000030: 08 01 00 00 00 00 00 00-00 00 00 00 00 00 00 00 *................* 00000040: 01 00 00 00 00 00 01 00-10 00 00 00 00 00 00 00 *................* 00000050: 02 00 00 00 13 68 5C 60-C7 C2 42 42 9C 27 50 A4 *.....h\`..BB.'P.* 00000060: C3 63 DB A4 01 00 00 00-00 10 22 00 00 00 00 00 *.c........".....* 00000070: 42 49 4F 53 00 00 00 00-42 49 4F 53 02 00 00 00 *BIOS....BIOS....* 00000080: 00 00 00 00 00 00 00 00-49 42 42 50 00 10 00 00 *........IBBP....* 00000090: 00 D0 0C 00 00 00 00 00-4F 42 42 50 00 E0 0C 00 *........OBBP....* 000000A0: 00 30 15 00 00 00 00 00-FF FF FF FF FF FF FF FF *.0..............* 000000B0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF *................* 000000C0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF *................* 000000D0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF *................* 000000E0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF *................* 000000F0: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF *................* CapsuleImage: 0x79470010, CapsuleSize: 0x22128C HASH verification for usage (0x00000400) with Hash Alg (0x1): Success SignType (0x1) SignSize (0x100) SignHashAlg (0x1) RSA verification for usage (0x00000400): Success Set next FWU state: 0x7F Get current FWU state: 0x7F GetFfsFileByName: Not Found GetVersionfromFv: Not Found VerifyFwVersion failed with Status = 0x8000000E ApplyFwImage failed with Status = Not Found Firmware Update status updated to reserved region Set next FWU state: 0x77 Firmware update Done! clear CSE flag to normal boot mode. HECI SecMode 0 I think my capsule image is not generated correctly. To do this, follow the steps below: 1. Build SBL for Apollo Lake: python BuildLoader.py build apl 2. Generate IFWI image using StitchIfwi.py which generate the APL_SBL_IFWI.bin file. 3. Flash APL_SBL_IFWI.bin using Dediprog. 4. Generate capsule image: python ./BootloaderCorePkg/Tools/GenCapsuleFirmware.py -v -p BIOS ../bios/IFWI/stitching/Output/APL_SBL_IFWI.bin -k ./BootloaderCorePkg/Tools/Keys/TestSigningPrivateKey.pem -o FwuImage.bin 5. Enter in SBL shell and run fwupdate whit a USB key connected. 6. I get the log shown at the beginning. Could you tell me if capsule image is correctly generated, if it is not, which BIOS file must I use as argument for GenCapsuleFirmware.py? Thanks. Best regards.