albi74 Posted July 5, 2020 Share Posted July 5, 2020 Hi all, I bought a new Lenovo ThinkBook 13s-IML laptop and these are the specs: Codename Kaby Lake-U/Y Specification Intel(R) Core(TM) i5-10210U CPU @ 1.60GHz Chipset Northbridge Intel Comet Lake rev. 0C Southbridge Intel Comet Lake PCH rev. 00 Memory SPD Memory type DDR4 Module format SO-DIMM Module Manufacturer(ID) Samsung (CE00000000000000000000) SDRAM Manufacturer (ID) Samsung (CE00000000000000000000) Size 8192 MBytes Max bandwidth DDR4-2666 (1333 MHz) Mainboard Model LNVNB161216 (0x000002B1 - 0x9FAA9BE0) Display Adapters Name Intel(R) UHD Graphics Board Manufacturer Lenovo Codename Comet Lake GT2 Technology 14 nm PCI device bus 0 (0x0), device 2 (0x2), function 0 (0x0) Vendor ID 0x8086 (0x17AA) Model ID 0x9B41 (0x3F15) Revision ID 0x2 I'm trying to install catalina 10.15.5 with opencore 0.5.9 but any configuration I try get stuck : EB # LOG:Exitbs: Start +++++++++++++++++++++++++++++++++++++++++++++++++ and I can't do the installation. cfg_lock in bios is enabled and cannot be disabled. When I tried to extract the BIOS to patch it up and edit it with ifrextract it tells me protocol: Unknown The bios, however, is locked for writing, therefore the various methods of modifying the cfg lock do not work. So i've enable AppleCpuPmCfgLock e AppleXcpmCfgLock I've try SetupVirtualMap e RebuildAppleMemoryMap n/n n/y y/y e y/n nothing Then i've try with DevirtualiseMmio and AppleXcpmExtraMsrs and Fakecpuid but rest Stuck at EB # LOG:Exitbs: Start Sorry for my english and please help me. EFI 2.zip opencore log.rar Link to comment Share on other sites More sharing options...
albi74 Posted July 5, 2020 Author Share Posted July 5, 2020 Hi, I know the comet lake platform, from what cpuz says I should have a GT2 igpu. With that said is there a way to get past this exitbs ?? I have tried several booter and kernel quirks with opencore but I have not been able to overcome it. I also tried cpu and gpu spoof but nothing. A help would be really appreciated Link to comment Share on other sites More sharing options...
albi74 Posted July 7, 2020 Author Share Posted July 7, 2020 I tried different versions of opencore from 0.5.7 to 0.5.9 and also 0.6.0 but the result does not change. It seems that the same problem afflicts the lenovo carbon x1 7th with comet lake on board, and my thinkbook shares with the latter 99% of the hardware only changes the chassis, and no one has managed to boot it up to now . Link to comment Share on other sites More sharing options...
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