Hi all, That coreboot fork does not automate the process of obtaining mrc.bin at all. Instead, it contains a disassembled/decompiled version of MRC and uses that instead. I would not recommend using that fork because it's outdated. On coreboot master, there's https://review.coreboot.org/43559 which should fix hangs with libgfxinit when a VGA display is plugged in, and https://review.coreboot.org/44155 which might help with https://ticket.coreboot.org/issues/259 or similar issues. I don't have a T440p, though.
On Fri, Aug 21, 2020 at 5:54 AM Harshit Sharma <harshitsharm...@gmail.com> wrote: > > Hi yk, > > As Matt said It is not just meant for chromebooks but haswell in general. > Just follow the instructions given on the coreboot page to obtain mrc.bin and > place it in the root coreboot directory as it says. > > That tutorial seems fishy to me as well. I'd suggest just run 'make > menuconfig' and select t440p from mainboard menu. You don't need to change > any values. The default values should work. > > Finally, build the coreboot image, split into 8MB + 4MB chunks and just flash > the 4MB chip. > > > Best, > Harshit > > > On Thu, Aug 20, 2020, 5:13 PM yk via coreboot <coreboot@coreboot.org> wrote: >> >> To anyone who has corebooted a t440p: >> >> I followed the instructions here >> https://doc.coreboot.org/northbridge/intel/haswell/mrc.bin.html to >> obtain an mrc.bin for the t440p, but it seems like these instructions >> are generalized and are meant for chromebooks, and not thinkpads. I >> gave it a try anyways and my t440p beeps and flashes LED's (as >> configured in .config, to do so on fatal error). Months of searching, >> and I can't find any documentation or archived emails from this >> mailing list for obtaining an mrc.bin specifically for the t440p. >> >> There exists this tutorial https://0xcb.dev/lenovo-t440p-coreboot/ but >> it tells me to use a forked version of coreboot which seems really >> fishy. I browsed the commits from that fork and I couldn't find anything >> that "automates obtaining mrc.bin" as it promises. >> >> What is the proper way to obtain the mrc.bin and configure for t440p? >> >> CONFIG_DCACHE_RAM_MRC_VAR_SIZE=0x30000 <-- also what should this value >> be if the mrc.bin is 186K? >> _______________________________________________ >> coreboot mailing list -- coreboot@coreboot.org >> To unsubscribe send an email to coreboot-le...@coreboot.org > > _______________________________________________ > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
