On Wed, Mar 3, 2021 at 10:29 PM asavah <asa...@avh.od.ua> wrote: > > printf changes in grub git seem to have broken uefi network boot. > > last good commit 968de8c23c1cba0f18230f778ebcf6c412ec8ec5 > first bad commit 83603bea6ce8fdff5ab3fbc4c9e592a8c71a8706 > > I did not test commits in between as they seem to be parts of the same > thing. > During testing the machine was rebooted many times, including cold boots > to try to avoid possible firmware glitches. > > How to reproduce: > Build grub from git, --with-platform=efi. > Build grub image grub-mkimage -c "embed.cfg" -p "/netboot/current" -d > "/test_prefix/lib/grub/x86_64-efi" --format=x86_64-efi > --output=grubx64-test.efi $(ls /test_prefix/lib/grub/x86_64-efi| sed -n > 's/\.mod//gp') > The contents of embed.cfg are as follows: > set root=(http,192.168.0.5) > set prefix=/netboot/current > > Have a grub.cfg (doesn't matter whats there) and kernel+initrd on the > http server. > > Try booting the machine via uefi pxe. > > Expected result: > The machine boots, grabs grub.cfg and whatnot from the http server and > presents the menu, works up to and including > 968de8c23c1cba0f18230f778ebcf6c412ec8ec5 . > > Actual result: > The machine waits for a while with a black screen and a after that falls > back to grub prompt. > No http requests can be seen in http server log or tcpdump. > Adding set debug=all to embed.cfg produces: > kern/disc.c:196: Opening `(http,192.168.36.5)' ... > kern/disc.c:281: Opening `(http,192.168.36.5)' failed. > kern/disc.c:295: Closing `http'. > net/net.c:1512: error receiving: 28: couldn't send network packet > * repeats last line many times >
Thank you for the report. I build an image with install_efi64/bin/grub-mkimage -c "embedded.cfg" -p "/netboot/current" -d "install_efi64/lib/grub/x86_64-efi/" --format=x86_64-efi --output grubx64-test.efi $(ls install_efi64/lib/grub/x86_64-efi/*.mod) and could not reproduce the problem on current master. When I start that image through pxe I do see http requests on the target machine and if I add a grub.cfg it does get loaded. I use the newly build grub-mkimage. Could you test if that makes a difference for you?
