Perhaps a bit late, but I've found a coreboot's memtest86+ payload is buggy compared to memtest86+ floppy (which could be downloaded from memtest.org and added to CBFS to be accessible as SeaBIOS menu entry). In addition to your observed problem: at AMD Lenovo G505S and maybe some other coreboot laptops, the USB devices like keyboard are not working at coreboot's memtest86+ while working fine at all the other payloads using "libpayload" (i.e. coreinfo or tint) - so it's not a libpayload problem - and also the same USB keyboards are working at memtest86+ floppy. So it is obvious something is broken at 86+ payload source code.
Also, with LZMA compression 86+ floppy occupies much less space than 86+ payload. So, aside from academic/research purposes, I do not see any advantages of 86+ payload compared to 86+ floppy - only disadvantages: larger size and troubled USB. I've seriously considered submitting a patch which replaces coreboot's memtest86+ payload with a floppy (download, compare its' checksum and then insert to CBFS), but then I thought that maybe someone could need 86+ payload as a coding example. If you would like to try out a floppy (e.g. because something else - like 2GB support - could be also broken at 86+ payload, while working fine at 86+ floppy booted through SeaBIOS) , here are the instructions: 1) Download the latest 5.01 version of memtest86+ from memtest86.org : wget https://www.memtest.org/download/5.01/memtest86+-5.01.floppy.zip 2) Calculate its' sha256 : sha256sum ./memtest86+-5.01.floppy.zip should be 2a2d4c1234c9130e1da5fea941ccfbaa343739d5b3302b5f3f9b24077868f8ee ./memtest86+-5.01.floppy.zip 3) If sha256 is correct, unzip ./memtest86+-5.01.floppy.zip . You'll get a "floppy" directory with these files: ls ./floppy/ dd.exe install64.bat install.bat memtestp.bin rawrite.exe README.txt You only need memtestp.bin , sha256 of which is " ddd4a2ba44c312aa4f2c7506a388cc2ca7f1caec60c3c6d80ed8a9f0b43d529c " 4) Size of memtestp.bin file is 150024 bytes. To be understood by SeaBIOS, it needs to be expanded to 1474560 bytes (by zeroes), which could be done with this command: dd if=/dev/zero of=./memtestp.bin bs=1 count=1 seek=1474559 conv=notrunc sha256 of expanded memtestp.bin file will be " 364535abd0d105da9396df6015e480c4d4c52b07dcc4e1d4756bde8ef87a30f1 " 5) Now it could be added to the compiled coreboot.rom with this command: ./build/cbfstool ./build/coreboot.rom add -f ./floppy/memtestp.bin -n floppyimg/memtestp.lzma -t raw -c lzma If done everything correctly, it will be available at SeaBIOS boot menu as Ramdisk [memtestp] Best regards, Mike Banon On Sun, Jul 28, 2019 at 8:40 AM Martin Kepplinger <mart...@posteo.de> wrote: > > Hi, > > I use the simple coreboot config > https://github.com/merge/skulls/blob/master/x230/free-defconfig-555419f356 > > on today's coreboot master branch HEAD (403f433238), using SeaBIOS 1.12.1. > > When choosing memtest86+ in SeaBIOS' menu, "Booting from CBFS" gets > printed but nothing else happens. > > Booting into nvramcui or coreinfo works though. > > (earlier, at least on coreboot 555419f356, using the same version of > SeaBIOS, things were fine). > > Can you imagine why? > > thanks, > martin > _______________________________________________ > SeaBIOS mailing list -- seab...@seabios.org > To unsubscribe send an email to seabios-le...@seabios.org _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
